| Genus |
Order |
Reference |
Note |
Nomenclature |
| D | |
| Daboecia | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Daboia | Squamata | Vitt & Caldwell (2009) | Serpentes. Viperidae. | ICZN |
| Dacelo | Coraciiformes | Clements (2007) | . | ICZN |
| Dacnis | Passeriformes | Clements (2007) | . | ICZN |
| Dacnomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dacochordodes | Gordioidea | Schmidt-Rhaesa (2002); Poinar Jr. (2008) | . | ICZN |
| Dacrycarpus | Araucariales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Dacrydium | Araucariales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Dacryodes | Sapindales | Mabberley (2008) | Burseraceae. | ICBN |
| Dacryotrichia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dactylactis | Ceriantharia | Tiffon (1987) | . | ICZN |
| Dactyladenia | Malpighiales | Mabberley (2008) | Chrysobalanaceae. | ICBN |
| Dactylaena | Brassicales | Mabberley (2008) | Capparaceae. | ICBN |
| Dactylamoeba | Dactylopodida | Rogerson & Patterson (2000); Smirnov et al. (2005) | Paramoebidae. | ICZN |
| Dactylanthus | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Dactylanthus | Santalales | Mabberley (2008) | Balanophoraceae. | ICBN |
| Dactylia | Haplosclerida | Desqueyroux-Faúndez & Valentine (2002) | . | ICZN |
| Dactyliandra | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Dactylicapnos | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Dactyliophora | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Dactylis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dactylobatus | Rajiformes | Nelson (2006) | . | ICZN |
| Dactylobiotus | Parachela | Kinchin (1994) | . | ICZN |
| Dactylocalyx | Hexactinosida | Reiswig (2002) | . | ICZN |
| Dactylocardamum | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dactylochlamys | Haptorida | Lynn (2008) | . | ICZN |
| Dactylocladus | Myrtales | Mabberley (2008) | Crypteroniaceae. | ICBN |
| Dactylococcopsis | | Yamagishi (2007) | The type species is chlorophyceae, while some species were transferred to Myxobaktron and Rhabdogloea.. | ICBN |
| Dactyloctenium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dactylolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dactylomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dactylophorella | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dactylophorus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dactylopodola | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Dactylopsila | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dactylorhiza | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dactylortyx | Galliformes | Clements (2007) | . | ICZN |
| Dactylosaccus | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Allogromiidae. | ICZN |
| Dactylosoma | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Dactylosphaerium | Dactylopodida | Rogerson & Patterson (2000); Smirnov et al. (2005) | Vexilliferidae. | ICZN |
| Dactylospongia | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Dactylosporangium | Micromonosporales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Dactylostalix | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dactylostoma | Endogenida | Lynn (2008) | . | ICZN |
| Dactylothele | Euonychophora | Reid (1996) | Peripatopsidae. | ICZN |
| Dactylotrochus | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Dadayiella | Tintinnida | Lynn (2008) | . | ICZN |
| Daedalopelta | | Pisera & Lévi (2002) | Domain Eucarya - Kingdom Animalia - Phylum Porifera - Class Demospongiae (lithistids) Neopeltidae. | ICZN |
| Daeguia | Rhizobiales | Yoon et al. (2008) | . | ICNB |
| Daemonorops | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Daenikera | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Dahlgrenodendron | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Dahlia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dahliaphyllum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dahlstedtia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dais | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Daitrona | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hemisphaeramminidae. | ICZN |
| Daknopholis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Daku | Acoela | Hooge (2003) | . | ICZN |
| Dalatias | Squaliformes | Nelson (2006) | . | ICZN |
| Dalbergaria | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Dalbergia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dalbergiella | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dalea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dalechampia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dalembertia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dalenia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dalhousiea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dallachya | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Dallwatsonia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dalmatella | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Dalophia | Squamata | Vitt & Caldwell (2009) | Amphisbaenidae. | ICZN |
| Daltonia | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Dalzellia | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Dama | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Damaliscus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Damasonium | Alismatales | Mabberley (2008) | Alismataceae. | ICBN |
| Damiria | Poecilosclerida | Hooper (2002) | . | ICZN |
| Damiriopsis | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Damnacanthus | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Damnamenia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Damnxanthodium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Damophila | Apodiformes | Clements (2007) | . | ICZN |
| Dampiera | Asterales | Mabberley (2008) | Goodeniaceae. | ICBN |
| Danae | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Danaea | Marattiales | Christenhusz et al. (2011) | . | ICBN |
| Danais | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dananemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Dandya | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Danguya | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Danhatchia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Daniela | Alcyonacea | Bayer (1981) | Nephtheidae. | ICZN |
| Daniellia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dansiea | Myrtales | Mabberley (2008) | Combretaceae. | ICBN |
| Danthonia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Danthonidium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Danthoniopsis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Daontesia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Dapania | Oxalidales | Mabberley (2008) | Oxalidaceae. | ICBN |
| Dapedophrya | Tetrahymenida | Lynn (2008) | . | ICZN |
| Daphnandra | Laurales | Mabberley (2008) | Atherospermataceae. | ICBN |
| Daphne | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Daphniphyllum | Saxifragales | Mabberley (2008) | Daphniphyllaceae. | ICBN |
| Daphnopsis | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Dapsilanthus | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Daption | Procellariiformes | Clements (2007) | . | ICZN |
| Daptrius | Falconiformes | Clements (2007) | . | ICZN |
| Darcya | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Darcyanthus | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Darevskia | Squamata | Vitt & Caldwell (2009) | Lacertidae. | ICZN |
| Darlingia | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Darlingtonia | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Darlingtonia | Ericales | Mabberley (2008) | Sarraceniaceae. | ICBN |
| Darmera | Saxifragales | Mabberley (2008) | Saxifragaceae. | ICBN |
| Darwinella | Dendroceratida | Bergquist & Cook (2002) | . | ICZN |
| Darwinia | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Dasania | Pseudomonadales | Lee et al. (2007) | . | ICNB |
| Dasia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Dasispermum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dasistoma | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Dasmosmilia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Dasoclema | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Dasya | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasyatis | Myliobatiformes | Nelson (2006) | . | ICZN |
| Dasycercus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dasychalina | Haplosclerida | Desqueyroux-Faúndez & Valentine (2002) | . | ICZN |
| Dasyclonium | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasycondylus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dasydytes | Chaetonotida | Balsamo et al. (2009) | . | ICZN |
| Dasyella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasygloea | Oscillatoriales | Hoffmann et al. (2005) | . | ICBN |
| Dasygrammitis | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dasykaluta | Dasyuromorphia | Groves (2005) | . | ICZN |
| Dasylepis | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Dasylirion | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Dasymaschalon | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Dasymys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dasynotus | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Dasyochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dasyornis | Passeriformes | Clements (2007) | . | ICZN |
| Dasypeltis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dasyphila | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasyphloea | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Dasyphyllum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dasypogon | Dasypogonales | Mabberley (2008) | Dasypogonaceae. | ICBN |
| Dasypops | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Dasyprocta | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dasyptilon | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasypus | Xenarthra | McKenna & Bell (1997) | . | ICZN |
| Dasypyrum | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dasysiphonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasysphaera | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Dasystenella | Alcyonacea | Bayer (1981) | Primnoidae. | ICZN |
| Dasythamniella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dasytricha | Vestibuliferida | Lynn (2008) | . | ICZN |
| Dasytropis | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Dasyuroides | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dasyurus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Datisca | Cucurbitales | Mabberley (2008) | Datiscaceae. | ICBN |
| Datura | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Daturella | Tintinnida | Lynn (2008) | nomen dubium. | ICZN |
| Daubentonia | Primates | McKenna & Bell (1997) | . | ICZN |
| Daubenya | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Daucosma | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Daucus | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dauphinea | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Dauresia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Daurotheca | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Davallia | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Davallodes | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Daveaua | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Davewakeum | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Davidia | Cornales | Mabberley (2008) | Nyssaceae. | ICBN |
| Davidsonia | Oxalidales | Mabberley (2008) | Cunoniaceae. | ICBN |
| Daviesia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Davilla | Dilleniales | Mabberley (2008) | Dilleniaceae. | ICBN |
| Davisia | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Dawsonia | Polytrichales | Goffinet et al. (2009) | . | ICBN |
| Dawsoniella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dawsoniocolax | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dayaoshania | Lamiales | Mabberley (2008); Möller et al. (2011) | Gesneriaceae. Later synonym of Oreocharis. | ICBN |
| Dayia | Ericales | Mabberley (2008) | Polemoniaceae. | ICBN |
| Deanea | Hexactinosida | Reiswig (2002) | . | ICZN |
| Deania | Squaliformes | Nelson (2006) | . | ICZN |
| Debarya | Zygnematales | Gontcharov (2008) | . | ICBN |
| Debregeasia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Decachaeta | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Decagonocarpus | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Decaisnea | Ranunculales | Mabberley (2008) | Lardizabalaceae. | ICBN |
| Decaisnina | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Decalepidanthus | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Decalepis | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Decalobanthus | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Decaphellia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Decarya | Caryophyllales | Mabberley (2008) | Didiereaceae. | ICBN |
| Decarydendron | Laurales | Mabberley (2008) | Monimiaceae. | ICBN |
| Decaryella | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Decaryochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Decaschistia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Decaspermum | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Decastylocarpus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Decatoca | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Decatropis | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Decazesia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Decazyx | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Deccania | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Deceptor | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dechloromonas | Rhodocyclales | Garrity et al. (2005) | . | ICNB |
| Dechlorosoma | Rhodocyclales | Garrity et al. (2005) | . | ICNB |
| Decipisagitta | Aphragmophora | Bieri (1991) | Sagittidae. | ICZN |
| Deckenia | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Declieuxia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Decodon | Myrtales | Mabberley (2008) | Lythraceae. | ICBN |
| Deconychura | Passeriformes | Clements (2007) | . | ICZN |
| Decorsea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Decorsella | Malpighiales | Mabberley (2008) | Violaceae. | ICBN |
| Decumaria | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Dedeckera | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Deefgea | Neisseriales | Stackebrandt et al. (2007) | . | ICNB |
| Deeringia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Deeringothamnus | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Deferribacter | Geovibriales | Garrity et al. (2005) | . | ICNB |
| Deferrisoma | | Slobodkina et al. (2012) | Domain Bacteria - Phylum Proteobacteria - Class Deltaproteobacteria (phylogenetically nested within the order Syntrophobacterales). | ICNB |
| Defluvibacter | Rhizobiales | Garrity et al. (2005); Kämpfer et al. (2009) | Later synonym of Aquamicrobium. | ICNB |
| Defluvicoccus | Rhodospirillales | Maszenan et al. (2005) | Incorrect spelling of Defluviicoccus. | ICNB |
| Defluviicoccus | Rhodospirillales | Maszenan et al. (2005) | . | ICNB |
| Defluviitalea | Clostridiales | Jabari et al. (2012) | . | ICNB |
| Defluviitoga | Thermotogales | Ben Hania et al. (2012) | . | ICNB |
| Degeneria | Magnoliales | Mabberley (2008) | Degeneriaceae. | ICBN |
| Degenia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Degranvillea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Deguelia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dehaasia | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Dehalobacter | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Dehalogenimonas | | Moe et al. (2009) | Domain Bacteria - Phylum Chloroflexi. | ICNB |
| Dehalospirillum | Campylobacterales | Garrity et al. (2005) | . | ICNB |
| Deharvengia | Euglyphida | Meisterfeld (2000) | . | ICZN |
| Deherainia | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Deianira | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Deidamia | Malpighiales | Mabberley (2008) | Passifloraceae. | ICBN |
| Deilanthe | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Deinacanthon | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Deinagkistrodon | Squamata | Vitt & Caldwell (2009) | Serpentes. Viperidae. | ICZN |
| Deinandra | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Deinanthe | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Deinbollia | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Deinobacterium | Deinococcales | Ekman et al. (2011) | . | ICNB |
| Deinocheilos | Lamiales | Mabberley (2008); Möller et al. (2011) | Gesneriaceae. Later synonym of Oreocharis. | ICBN |
| Deinococcus | Deinococcales | Garrity et al. (2005) | . | ICNB |
| Deinostema | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Deinostigma | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Deiopea | Lobata | Harbison & Madin (1982) | . | ICZN |
| Deiregyne | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Deirochelys | Testudinata | Vitt & Caldwell (2009) | Emydidae. | ICZN |
| Delairea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Delamerea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Delamurea | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Delanymys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Delarbrea | Apiales | Mabberley (2008) | Myodocarpaceae. | ICBN |
| Delavaya | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Delavayella | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Delectona | Hadromerida | Rützler (2002) | . | ICZN |
| Deleornis | Passeriformes | Clements (2007) | . | ICZN |
| Delesseria | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Delesseriopsis | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Deleya | Oceanospirillales | Garrity et al. (2005) | . | ICNB |
| Delftia | Burkholderiales | Garrity et al. (2005) | . | ICNB |
| Delichon | Passeriformes | Clements (2007) | . | ICZN |
| Delilia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Delisea | Bonnemaisoniales | Schneider & Wynne (2007) | . | ICBN |
| Delissea | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Dellochus | Heterotrichida | Lynn (2008) | . | ICZN |
| Delma | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Delomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Delonix | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Delosina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Delosinidae. | ICZN |
| Delosperma | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Delostoma | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Delothraupis | Passeriformes | Clements (2007) | . | ICZN |
| Delphinapterus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Delphinium | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Delphinus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Delphyella | Astomatida | Lynn (2008) | . | ICZN |
| Delpinophytum | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Delpydora | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Deltacanthus | Gyracanthocephala | Amin (1985) | . | ICZN |
| Deltamys | Rodentia | Musser & Carleton (2005) | . | ICZN |
| Deltarhynchus | Passeriformes | Clements (2007) | . | ICZN |
| Deltaria | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Deltocyathoides | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Deltocyathus | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Deltopylum | Tetrahymenida | Lynn (2008) | . | ICZN |
| Deltotrichonympha | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Demansia | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Demavendia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Demequina | Micrococcales | Yi et al. (2007); Ludwig et al. (2012) | . | ICNB |
| Demetria | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Demisagitta | Aphragmophora | Bieri (1991) | Sagittidae. | ICZN |
| Demosthenesia | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Dendoricella | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Dendragama | Squamata | Vitt & Caldwell (2009) | Agamidae. | ICZN |
| Dendragapus | Galliformes | Clements (2007) | . | ICZN |
| Dendrelaphis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dendrexetastes | Passeriformes | Clements (2007) | . | ICZN |
| Dendrilla | Dendroceratida | Bergquist & Cook (2002) | . | ICZN |
| Dendritina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Peneroplidae. | ICZN |
| Dendroalsia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dendroaspis | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Dendrobangia | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Dendrobates | Anura | Vitt & Caldwell (2009) | Dendrobatidae. | ICZN |
| Dendrobathypathes | Antipatharia | Opresko (2002) | . | ICZN |
| Dendrobazzania | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dendrobium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dendrobrachia | Alcyonacea | Opresko & Bayer (1991) | Dendrobrachiidae. | ICZN |
| Dendrocacalia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dendrocalamopsis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dendrocalamus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dendroceros | Dendrocerotales | Renzaglia et al. (2009) | . | ICBN |
| Dendrochilum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dendrocincla | Passeriformes | Clements (2007) | . | ICZN |
| Dendrocitta | Passeriformes | Clements (2007) | . | ICZN |
| Dendrocnide | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Dendrocolaptes | Passeriformes | Clements (2007) | . | ICZN |
| Dendrocometes | Evaginogenida | Lynn (2008) | . | ICZN |
| Dendroconche | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dendrocopos | Piciformes | Clements (2007) | . | ICZN |
| Dendrocousinsia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dendrocryphaea | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dendrocyathophorum | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Dendrocygna | Anseriformes | Clements (2007) | . | ICZN |
| Dendrodasys | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Dendrodoa | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Styelidae. | ICZN |
| Dendrogale | Scandentia | McKenna & Bell (1997) | . | ICZN |
| Dendrogyra | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Dendro-hypnum | Hypnodendrales | Goffinet et al. (2009) | . | ICBN |
| Dendrohypopterygium | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Dendrohyrax | Hyracoidea | McKenna & Bell (1997) | . | ICZN |
| Dendroica | Passeriformes | Clements (2007) | . | ICZN |
| Dendrokingstonia | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Dendrolagus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dendrolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dendroligotrichum | Polytrichales | Goffinet et al. (2009) | . | ICBN |
| Dendrolobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dendrolycus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dendromastigophora | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dendromecon | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Dendromonas | Ochromonadales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chromulinaceae (biflagellate). | ICBN |
| Dendromus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dendromyza | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Dendronanthus | Passeriformes | Clements (2007) | . | ICZN |
| Dendronema | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dendronina | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Rhabdamminidae. | ICZN |
| Dendronucleata | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Dendropanax | Apiales | Mabberley (2008) | Araliaceae. | ICBN |
| Dendropathes | Antipatharia | Opresko (2005) | . | ICZN |
| Dendropemon | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Dendrophidion | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dendrophorbium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dendrophrya | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Rhabdamminidae. | ICZN |
| Dendrophryniscus | Anura | Vitt & Caldwell (2009) | Bufonidae. | ICZN |
| Dendrophthoe | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Dendrophthora | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Dendrophylax | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dendrophyllia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Dendropicos | Piciformes | Clements (2007) | . | ICZN |
| Dendroplex | Passeriformes | Clements (2007) | . | ICZN |
| Dendropodola | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Dendropogonella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dendroprionomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dendropsophus | Anura | Vitt & Caldwell (2009) | Hylidae. | ICZN |
| Dendrorhynchus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dendrorhynchus | Heteronemertea | Gibson (1995); Kajihara et al. (2008) | Junior homonym. Replaced by Polydendrorhynchus. | ICZN |
| Dendrortyx | Galliformes | Clements (2007) | . | ICZN |
| Dendrosenecio | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dendroseris | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dendrosicyos | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Dendrosida | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Dendrosipanea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dendrosoma | Endogenida | Lynn (2008) | . | ICZN |
| Dendrosomides | Exogenida | Lynn (2008) | . | ICZN |
| Dendrosporobacter | Selenomonadales | Garrity et al. (2005); Marchandin et al. (2010) | . | ICNB |
| Dendrospyris | Nassellaria | Anderson et al. (2000) | . | ICZN |
| Dendrothrix | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dendrotriton | Caudata | Vitt & Caldwell (2009) | Plethodontidae. | ICZN |
| Dendrotrophe | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Dendrotuba | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Allogromiidae. | ICZN |
| Dendroxea | Haplosclerida | De Weerdt (2002) | . | ICZN |
| Dendya | Clathrinida | Borojevic et al. (2002) | . | ICZN |
| Denekia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Denhamia | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Denhartogia | Alcyonacea | Ocaña & van Ofwegen (2003) | Clavulariidae. | ICZN |
| Denisonia | Squamata | Mattison (2007); Vitt & Caldwell (2009) | Serpentes. Elapidae. Not "Densonia". | ICZN |
| Denitratisoma | Rhodocyclales | Fahrbach et al. (2006) | . | ICNB |
| Denitrobacterium | Coriobacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Denitrovibrio | Geovibriales | Garrity et al. (2005) | . | ICNB |
| Denmoza | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Dennstaedtia | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Denotarisia | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Denscantia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dentacineta | Exogenida | Lynn (2008) | . | ICZN |
| Dentalina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nodosariidae. | ICZN |
| Dentella | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dentichona | Cryptogemmida | Lynn (2008) | . | ICZN |
| Dentitheca | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Dentitruncus | Echinorhynchida | Amin (1985) | . | ICZN |
| Dentomuricea | Alcyonacea | Bayer (1981) | Plexauridae. | ICZN |
| Dentostomina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hauerinidae. | ICZN |
| Deomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Depanthus | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Deparia | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Depastromorpha | Stauromedusae | Kramp (1961) | . | ICZN |
| Depastrum | Stauromedusae | Kramp (1961) | . | ICZN |
| Dephomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Deplanchea | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Deppea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Deprea | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Dercitus | Astrophorida | Maldonado (2002) | . | ICZN |
| Derepyxis | Hibberdiales | Kristiansen & Preisig (2001) | Stylococcaceae. | ICBN |
| Dermabacter | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Dermacoccus | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Dermamoeba | Dermamoebida | Rogerson & Patterson (2000); Cavalier-Smith et al. (2004); Smirnov et al. (2011) | . | ICZN |
| Dermatemys | Testudinata | Vitt & Caldwell (2009) | Dermatemydidae. | ICZN |
| Dermatobotrys | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Dermatochrysis | Hibberdiales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chrysocapsaceae (uniflagellate). | ICBN |
| Dermatonotus | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Dermatophilus | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Dermatreton | Leucosolenida | Borojevic et al. (2002) | . | ICZN |
| Dermocarpa | Chroococcales | Yamagishi (2007) | This genus was divided into Chamaecalyx, Cyanocystis, Dermocarpella, Xenococcus and Xenotholos.. | ICBN |
| Dermocarpella | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Dermochelys | Testudinata | Vitt & Caldwell (2009) | Dermochelyidae. | ICZN |
| Dermocystidium | Dermocystida | Mendoza et al. (2002) | . | ICZN |
| Dermonema | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Dermophis | Gymnophiona | Vitt & Caldwell (2009) | "Caeciliidae". | ICZN |
| Deroptyus | Psittaciformes | Clements (2007) | . | ICZN |
| Derris | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Derxia | Burkholderiales | Garrity et al. (2005) | . | ICNB |
| Desbordesia | Malpighiales | Mabberley (2008) | Irvingiaceae. | ICBN |
| Deschampsia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Descurainia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Desemzia | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Desertibacter | Rhodospirillales | Liu et al. (2011) | . | ICNB |
| Desertifilum | Oscillatoriales | Dadheech et al. (2012) | . | ICBN |
| Desfontainia | Bruniales | Mabberley (2008) | Desfontainiaceae. | ICBN |
| Desideria | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Desikacharyella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Desmacella | Poecilosclerida | Hajdu & Van Soest (2002) | . | ICZN |
| Desmacidon | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Desmana | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Desmanthodium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Desmanthus | | Pisera & Lévi (2002) | Domain Eucarya - Kingdom Animalia - Phylum Porifera - Class Demospongiae (lithistids) Desmanthidae. | ICZN |
| Desmanthus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Desmapsamma | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Desmarella | Craspedida | Leadbeater & Thomsen (2000) | . | ICZN |
| Desmazeria | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Desmidium | Desmidiales | Gontcharov (2008) | . | ICBN |
| Desmocapsa | Desmocapsales | Fensome et al. (1993) | . | ICBN |
| Desmocladus | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Desmococcus | Prasiolales | Eliáš & Neustupa (2009) | As Stichococcus/Raphidonema clade. | ICBN |
| Desmodasys | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Desmodiastrum | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Desmodilliscus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Desmodillus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Desmodium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Desmodus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Desmognathus | Caudata | Vitt & Caldwell (2009) | Plethodontidae. | ICZN |
| Desmomastix | Desmocapsales | Fensome et al. (1993) | . | ICBN |
| Desmomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Desmoncus | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Desmonema | Semaeostomeae | Kramp (1961) | . | ICZN |
| Desmophrya | Astomatida | Lynn (2008) | . | ICZN |
| Desmophyes | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Desmophyllum | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Desmopsis | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Desmos | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Desmoscelis | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Desmoschoenus | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Desmosiphon | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Desmospora | Bacillales | Yassin et al. (2009) | . | ICNB |
| Desmostachya | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Desmostachys | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Desmotes | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Desmotheca | Orthotrichales | Goffinet et al. (2009) | . | ICBN |
| Desplatsia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Desportesia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Desseria | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Desulfacinum | Syntrophobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfarculus | Desulfarcales | Garrity et al. (2005) | . | ICNB |
| Desulfatibacillum | Desulfobacterales | Cravo-Laureae et al. (2004) | . | ICNB |
| Desulfatiferula | Desulfobacterales | Cravo-Laureau et al. (2007) | . | ICNB |
| Desulfatirhabdium | Desulfobacterales | Balk et al. (2008) | . | ICNB |
| Desulfitibacter | Clostridiales | Nielsen et al. (2006); Sorokin & Muyzer (2010) | . | ICNB |
| Desulfitispora | Clostridiales | Sorokin & Muyzer (2010) | . | ICNB |
| Desulfitobacterium | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Desulfobacca | Syntrophobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfobacter | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfobacterium | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfobacula | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfobaculum | Desulfovibrionales | Zhao et al. (2012) | . | ICNB |
| Desulfobotulus | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfobulbus | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfocapsa | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfocella | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfococcus | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfocurvus | Desulfovibrionales | Klouche et al. (2009) | . | ICNB |
| Desulfofaba | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfofrigus | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfofustis | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfoglaeba | Syntrophobacterales | Davidova et al. (2006) | . | ICNB |
| Desulfohalobium | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfoluna | Desulfobacterales | Suzuki et al. (2008) | . | ICNB |
| Desulfomicrobium | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfomonas | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfomonile | Syntrophobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfomusa | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfonatronobacter | Desulfobacterales | Sorokin et al. (2012) | . | ICNB |
| Desulfonatronospira | Desulfovibrionales | Sorokin et al. (2008) | . | ICNB |
| Desulfonatronovibrio | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfonatronum | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfonauticus | Desulfovibrionales | Audiffrin et al. (2003) | . | ICNB |
| Desulfonema | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfonispora | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Desulfopila | Desulfobacterales | Suzuki et al. (2007) | . | ICNB |
| Desulforegula | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulforhabdus | Syntrophobacterales | Garrity et al. (2005) | . | ICNB |
| Desulforhopalus | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfosalsimonas | Desulfobacterales | Kjeldsen et al. (2010) | . | ICNB |
| Desulfosarcina | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfosoma | Syntrophobacterales | Baena et al. (2011) | . | ICNB |
| Desulfospira | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfosporosinus | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Desulfotalea | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfothermus | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfotignum | Desulfobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfotomaculum | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Desulfovermiculus | Desulfovibrionales | Belyakova et al. (2006) | . | ICNB |
| Desulfovibrio | Desulfovibrionales | Garrity et al. (2005) | . | ICNB |
| Desulfovirga | Syntrophobacterales | Garrity et al. (2005) | . | ICNB |
| Desulfovirgula | Thermoanaerobacterales | Kaksonen et al. (2007) | . | ICNB |
| Desulfurella | Desulfurellales | Garrity et al. (2005) | . | ICNB |
| Desulfurispira | Chrysiogenales | Sorokin & Muyzer (2010) | . | ICNB |
| Desulfurispirillum | Chrysiogenales | Sorokin et al. (2007) | . | ICNB |
| Desulfurispora | Clostridiales | Kaksonen et al. (2007) | . | ICNB |
| Desulfurivibrio | Desulfobacterales | Sorokin et al. (2008) | . | ICNB |
| Desulfurobacterium | Aquificales | Garrity et al. (2005) | . | ICNB |
| Desulfurococcus | Desulfurococcales | Garrity et al. (2005) | . | ICNB |
| Desulfurolobus | Sulfolobales | Garrity et al. (2005) | Later synonym of Acidianus. | ICNB |
| Desulfuromonas | Desulfuromonales | Garrity et al. (2005) | . | ICNB |
| Desulfuromusa | Desulfuromonales | Garrity et al. (2005) | . | ICNB |
| Detarium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dethawia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dethiobacter | Clostridiales | Sorokin et al. (2008) | . | ICNB |
| Dethiosulfatibacter | Clostridiales | Takii et al. (2007) | . | ICNB |
| Dethiosulfovibrio | Synergistales | Garrity et al. (2005); Jumas-Bilak et al. (2007); Jumas-Bilak et al. (2009) | . | ICNB |
| Deucalion | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Deuterammina | Trochamminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Trochamminidae. | ICZN |
| Deuteramoeba | Euamoebida | Rogerson & Patterson (2000); Smirnov et al. (2005) | . | ICZN |
| Deuterocohnia | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Deuterogonaria | Acoela | Dörjes (1968) | . | ICZN |
| Deuteromera | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Deutzia | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Deutzianthus | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Devaleraea | Palmariales | Schneider & Wynne (2007) | . | ICBN |
| Developayella | Developayellales | Cavalier-Smith & Chao (2006) | . | ICZN |
| Devendrosentis | Gyracanthocephala | Amin (1985) | . | ICZN |
| Deverra | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Devescovina | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Devia | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Deviata | Stichotrichida | Lynn (2008) | . | ICZN |
| Devogelia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Devosia | Rhizobiales | Garrity et al. (2005) | . | ICNB |
| Devriesea | Micrococcales | Martel et al. (2008); Ludwig et al. (2012) | . | ICNB |
| Dewevrea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dewevrella | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dewildemania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dexiostoma | Tetrahymenida | Lynn (2008) | . | ICZN |
| Dexiotricha | Philasterida | Lynn (2008) | . | ICZN |
| Dexiotrichides | Philasterida | Lynn (2008) | . | ICZN |
| Dextrocarpa | Stolidobranchia | Monniot & Monniot (1972) | Styelidae. | ICZN |
| Dextrogaster | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Pyuridae (or possibly Corellidae in Phlebobranchia). | ICZN |
| Dhofaria | Brassicales | Mabberley (2008) | Capparaceae. | ICBN |
| Diacalpe | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Diacarnus | Poecilosclerida | Kelly & Samaai (2002) | . | ICZN |
| Diachea | Physarales | Yamamoto (1998) | . | ICBN |
| Diacheopsis | Stemonitales | Yamamoto (1998) | . | ICBN |
| Diachros | Mischococcales | Ettl (1978) | . | ICBN |
| Diacidia | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Diacranthera | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Diacrodon | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Diacronema | Pavlovales | Edvardsen et al. (2000); Jordan et al. (2004) | Pavlovaceae. | ICBN |
| Diadenium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diadophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Diadumene | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Diaemus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Diafolliculina | Heterotrichida | Lynn (2008) | nomen nudum. | ICZN |
| Dialister | Selenomonadales | Garrity et al. (2005); Marchandin et al. (2010) | . | ICNB |
| Dialium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dialyceras | Malvales | Mabberley (2008) | Sphaerosepalaceae. | ICBN |
| Dialypetalanthus | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dialypetalum | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Dialytheca | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Dialytrichia | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Diamantina | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Diamena | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Diandrolyra | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dianella | Asparagales | Mabberley (2008) | Hemerocallidaceae. | ICBN |
| Dianema | Trichiales | Yamamoto (1998) | . | ICBN |
| Dianthoseris | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dianthoveus | Pandanales | Mabberley (2008) | Cyclanthaceae. | ICBN |
| Dianthus | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Diapensia | Ericales | Mabberley (2008) | Diapensiaceae. | ICBN |
| Diaperia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Diaphananthe | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diaphanodon | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Diaphanoeca | Acanthoecida | Leadbeater & Thomsen (2000) | . | ICZN |
| Diaphanoptera | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Diaphorobacter | Burkholderiales | Garrity et al. (2005) | . | ICNB |
| Diaphorolepis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Diaphoropodon | Tectofilosida | Meisterfeld (2000); Cavalier-Smith & Chao (2003) | Chlamydophryidae. | ICZN |
| Diaphractanthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Diapse | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Diaretula | Hexactinosida | Reiswig (2002) | . | ICZN |
| Diarrhena | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Diarthron | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Diascia | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Diaseris | Scleractinia | Veron (2000) | . | ICZN |
| Diaspora | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Diasporangium | Pythiales | Dick (2001); Kirk et al. (2008) | Pythiaceae. | ICBN |
| Diastatea | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Diastema | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Diaster | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Diatenopteryx | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Diatomovora | Acoela | Dörjes (1968); Hooge & Tyler (2005) | . | ICZN |
| Diaxonella | Urostylida | Lynn (2008) | . | ICZN |
| Diazona | Aplousobranchia | Monniot & Monniot (1972); Kott (1998); Monniot (2001) | Diazonidae. | ICZN |
| Dibamus | Squamata | Vitt & Caldwell (2009) | Dibamidae. | ICZN |
| Dibrachionostylus | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dicaeum | Passeriformes | Clements (2007) | . | ICZN |
| Dicamptodon | Caudata | Vitt & Caldwell (2009) | Ambystomatidae. | ICZN |
| Dicarpa | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Styelidae. | ICZN |
| Dicarpellum | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Dicarpidium | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Dicauda | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Dicella | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Dicellandra | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dicellostyles | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Dicentra | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Dicerandra | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Diceratella | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Diceratostele | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diceratula | Haptorida | Lynn (2008) | Later synonym of Spathidium?. | ICZN |
| Dicercoclados | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dicerocaryum | Lamiales | Mabberley (2008) | Pedaliaceae. | ICBN |
| Dicerorhinus | Perissodactyla | McKenna & Bell (1997) | . | ICZN |
| Diceros | Perissodactyla | McKenna & Bell (1997) | . | ICZN |
| Dichaea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dichaetanthera | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dichaetaria | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dichaetophora | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dichaetura | Chaetonotida | Balsamo et al. (2009) | . | ICZN |
| Dichanthelium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dichanthium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dichapetalum | Malpighiales | Mabberley (2008) | Dichapetalaceae. | ICBN |
| Dichasianthus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dichazothece | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Dichelachne | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dichelobacter | Cardiobacteriales | Garrity et al. (2005) | . | ICNB |
| Dichelodontium | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Dichelostemma | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Dichelyma | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dicheranthus | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Dichilanthe | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dichilum | Tetrahymenida | Lynn (2008) | . | ICZN |
| Dichilus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dichocarpum | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Dichocoenia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Dichodontium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dichondra | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Dichonemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Dichopsammia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Dichorisandra | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Dichosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dichostemma | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dichothrix | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Dichotomanthes | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Dichotomaria | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Dichotomia | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Dichotomicrobium | Rhizobiales | Garrity et al. (2005) | . | ICNB |
| Dichotomococcus | Mischococcales | Ettl (1978) | . | ICBN |
| Dichroa | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Dichrocephala | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dichromanthus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dichromochlamys | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dichrostachys | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dichrozona | Passeriformes | Clements (2007) | . | ICZN |
| Dickasonia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dickeya | Enterobacteriales | Samson et al. (2005) | . | ICNB |
| Dickinsia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dicksonia | Cyatheales | Christenhusz et al. (2011) | . | ICBN |
| Dicladanthera | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Diclidanthera | Fabales | Mabberley (2008) | Polygalaceae. | ICBN |
| Diclidurus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Diclinanona | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Dicliptera | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Diclis | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Dicloster | Chlorellales | Krienitz et al. (2010) | Parachlorella clade in Chlorellaceae. | ICBN |
| Dicnemon | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicnida | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dicodonium | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dicoelia | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Dicoelophrya | Astomatida | Lynn (2008) | . | ICZN |
| Dicoma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dicontophrya | Astomatida | Lynn (2008) | . | ICZN |
| Dicopia | Phlebobranchia | Monniot & Monniot (1972); Monniot (2001) | Octacnemidae. | ICZN |
| Dicoria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dicoryne | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dicorynia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dicoryphe | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Dicraeanthus | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Dicraeopetalum | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dicranella | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicranema | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Dicranocarpus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dicranodontium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicranolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dicranolepis | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Dicranoloma | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicranophora | Symphyacanthida | Febvre et al. (2000) | . | ICZN |
| Dicranophoroides | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Dicranophorus | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Dicranopteris | Gleicheniales | Christenhusz et al. (2011) | . | ICBN |
| Dicranopygium | Pandanales | Mabberley (2008) | Cyclanthaceae. | ICBN |
| Dicranostigma | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Dicranostyles | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Dicranoweisia | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicranum | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dicraspedella | Craspedida | Nitsche et al. (2011) | . | ICZN |
| Dicraspidia | Malvales | Mabberley (2008) | Muntingiaceae. | ICBN |
| Dicrastylis | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Dicrateria | Isochrysidales | Jordan et al. (2004) | Isochrysidaceae. | ICBN |
| Dicrocaulon | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Dicrodon | Squamata | Vitt & Caldwell (2009) | Teiidae. | ICZN |
| Dicroerisma | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Dicroglossum | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dicrostonyx | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dicrurus | Passeriformes | Clements (2007) | . | ICZN |
| Dictamnus | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Dictiomyxa | | Bass et al. (2009) | Domain Eucarya - Rhizaria - incertae sedis - Family Rhizoplasmidae. | ICZN |
| Dictyacantha | Arthracanthida | Febvre et al. (2000) | . | ICZN |
| Dictyandra | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dictyaspis | Arthracanthida | Febvre et al. (2000) | . | ICZN |
| Dictyaulus | Lyssacinosida | Tabachnick (2002) | . | ICZN |
| Dictydiaethalium | Liceales | Yamamoto (1998) | . | ICBN |
| Dictydium | Liceales | Yamamoto (1998) | Later synonym of Cribraria. | ICBN |
| Dictymia | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dictyocalyx | Lyssacinosida | Tabachnick (2002) | . | ICZN |
| Dictyocaryum | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Dictyocha | Dictyochales | Moestrup (2000) | . | ICBN |
| Dictyochloropsis | | Neustupa et al. (2009); Darienko et al. (2010) | Domain Eucarya - Phylum Chlorophyta - Class Trebouxiophyceae. Watanabea-clade. | ICBN |
| Dictyocladium | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Dictyocysta | Tintinnida | Lynn (2008) | . | ICZN |
| Dictyodendrilla | Dendroceratida | Bergquist & Cook (2002) | . | ICZN |
| Dictyoglomus | Dictyoglomales | Garrity et al. (2005) | . | ICNB |
| Dictyolimon | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Dictyoloma | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Dictyomenia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dictyonella | Halichondrida | Van Soest et al. (2002) | . | ICZN |
| Dictyoneura | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Dictyophimus | Nassellaria | Anderson et al. (2000) | . | ICZN |
| Dictyophleba | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dictyophragmus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dictyophyllaria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dictyosperma | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Dictyospermum | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Dictyosphaerium | Chlorellales | Krienitz et al. (2010) | Parachlorella clade in Chlorellaceae. | ICBN |
| Dictyostega | Dioscoreales | Mabberley (2008) | Burmanniaceae. | ICBN |
| Dictyostelium | Dictyosteliales | Hagiwara (1989) | . | ICBN |
| Dictyostyela | Stolidobranchia | Monniot & Monniot (1972); Kott (1998) | Junior synonym of Polyzoa. | ICZN |
| Dictyothamnion | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Dictypleiosporus | Saprolegniales | Kirk et al. (2008) | Saprolegniaceae. | ICBN |
| Dictyuchus | Saprolegniales | Dick (2001); Kirk et al. (2008) | Saprolegniaceae. | ICBN |
| Dictyurus | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dicyclocoryne | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dicyclophora | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dicycloposthium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Dicyclotrichium | Haptorida | Lynn (2008) | . | ICZN |
| Dicyema | Dicyemida | Stunkard (1982); Furuya et al. (2007) | . | ICZN |
| Dicyemennea | Dicyemida | Stunkard (1982); Furuya et al. (2007) | . | ICZN |
| Dicyemodeca | Dicyemida | Furuya et al. (2007) | . | ICZN |
| Dicymbe | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dicypellium | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Didascalus | Schizopyrenida | Brown & De Jonckheere (1994); Patterson et al. (2000); De Jonckheere & Brown (2005) | Junior synonym of Tetramitus. | ICZN |
| Didelotia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Didelphis | Ameridelphia | McKenna & Bell (1997) | . | ICZN |
| Didelta | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Didemnum | Aplousobranchia | Monniot & Monniot (1972); Monniot (2001) | Didemnidae. | ICZN |
| Diderma | Physarales | Yamamoto (1998) | . | ICBN |
| Didesmandra | Dilleniales | Mabberley (2008) | Dilleniaceae. | ICBN |
| Didesmis | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Didesmus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Didierea | Caryophyllales | Mabberley (2008) | Didiereaceae. | ICBN |
| Didieria | Peniculida | Lynn (2008) | . | ICZN |
| Didinium | Haptorida | Lynn (2008) | . | ICZN |
| Didiscus | Halichondrida | Hooper (2002) | . | ICZN |
| Didissandra | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Didonica | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Didunculus | Columbiformes | Clements (2007) | . | ICZN |
| Didymaea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Didymanthus | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Didymaotus | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Didymeles | Buxales | Mabberley (2008) | Buxaceae. | ICBN |
| Didymiandrum | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Didymium | Physarales | Yamamoto (1998) | . | ICBN |
| Didymocarpus | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Didymochlaena | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Didymochlamys | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Didymochrysis | Ochromonadales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chromulinaceae (biflagellate). | ICBN |
| Didymocistus | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Didymocyrtis | Spumellaria | Anderson et al. (2000) | . | ICZN |
| Didymodactylos | Bdelloida | Segers (2002); Segers (2007) | . | ICZN |
| Didymodon | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Didymodoxa | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Didymoeca | Acanthoecida | Doweld (2003); Nitsche et al. (2011) | Replacement name for Diplotheca. | ICZN |
| Didymogenes | Chlorellales | Luo et al. (2009) | Chlorella clade in Chlorella clade in Chlorellaceae. | ICBN |
| Didymoglossum | Hymenophyllales | Christenhusz et al. (2011) | . | ICBN |
| Didymophyes | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Didymophysa | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Didymoplexiella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Didymoplexiopsis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Didymoplexis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Didymopogon | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Didymosalpinx | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Didymostigma | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Didynamipus | Anura | Vitt & Caldwell (2009) | Bufonidae. | ICZN |
| Dieffenbachia | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Diegodendron | Malvales | Mabberley (2008) | Bixaceae. | ICBN |
| Dielitzia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dielsantha | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Dielsia | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Dielsiocharis | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dielsiochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dielsiothamnus | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Dientamoeba | Tritrichomonadida | Cepicka et al. (2010) | . | ICZN |
| Dierama | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Dierogekko | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Diervilla | Dipsacales | Mabberley (2008) | Caprifoliaceae. | ICBN |
| Dieteria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dietes | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Dietzia | Corynebacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Difficilina | Eugregarinorida | Simdyanov (2009) | . | ICZN |
| Difflugia | Arcellinida | Meisterfeld (2000) | Difflugina -- Difflugiidae. | ICZN |
| Diffusilina | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Diffusilinidae. | ICZN |
| Digenea | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Digera | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Digilchristia | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Digitacalia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Digitalis | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Digitaria | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Diglossa | Passeriformes | Clements (2007) | . | ICZN |
| Diglossopis | Passeriformes | Clements (2007) | . | ICZN |
| Diglyphosa | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dignathia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dignonemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Digomphia | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Digoniopterys | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Digordius | Gordioidea | Schmidt-Rhaesa (2002); Poinar Jr. (2008) | . | ICZN |
| Digyalum | Archigregarinorida | Perkins et al. (2000); Rueckert & Leander (2009) | Selenidiidae. | ICZN |
| Diheteropogon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dilatris | Commelinales | Mabberley (2008) | Haemodoraceae. | ICBN |
| Dileptus | Haptorida | Lynn (2008) | . | ICZN |
| Dilkea | Malpighiales | Mabberley (2008) | Passifloraceae. | ICBN |
| Dillandia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dillenia | Dilleniales | Mabberley (2008) | Dilleniaceae. | ICBN |
| Dilleria | Vestibuliferida | Lynn (2008) | . | ICZN |
| Dillwynia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dilobeia | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Dilochia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dilodendron | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Dilomilis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dilophia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dilophotriche | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dilsea | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Dimacrocaryon | Haptorida | Lynn (2008) | . | ICZN |
| Dimastigella | Neobodonida | Moreira et al. (2004) | . | ICZN |
| Dimerandra | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dimeresia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dimeria | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dimerocostus | Zingiberales | Mabberley (2008) | Costaceae. | ICBN |
| Dimerodontium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dimerostemma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dimetra | Lamiales | Mabberley (2008) | Oleaceae. | ICBN |
| Dimocarpus | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Dimophyes | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Dimorpha | Aplousobranchia | Monniot & Monniot (1972) | Polycitoridae. | ICZN |
| Dimorphandra | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dimorphanthera | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Dimorphina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Vaginulinidae. | ICZN |
| Dimorphocalyx | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dimorphocarpa | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dimorphocladon | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dimorphococthurnia | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Dimorphocoma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dimorphophyton | Alcyonacea | Williams (2000) | Alcyoniidae. | ICZN |
| Dimorphorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dimorphosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dimorphotheca | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dinamoeba | Phytodiniales | Fensome et al. (1993) | . | ICBN |
| Dinaromys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dinastridium | Phytodiniales | Fensome et al. (1993) | . | ICBN |
| Dinebra | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dinema | Heteronematales | Silva (1960); Leedale (1967) | Later homonym. Replaced by Dinematomonas. | ICBN |
| Dinemagonum | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Dinemandra | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Dinematomonas | Heteronematales | Silva (1960); Leedale (1967); Nakada (2010) | . | ICBN |
| Dinematospora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dinemellia | Passeriformes | Clements (2007) | . | ICZN |
| Dinenympha | Oxymonadida | Moriya et al. (2003) | . | ICZN |
| Dinetus | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Dinizia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dinklageella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dinklageodoxa | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Dinobryon | Ochromonadales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Dinobryaceae (biflagellate). | ICBN |
| Dinochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dinoclonium | Phytodiniales | Fensome et al. (1993) | . | ICBN |
| Dinodasys | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Dinodon | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dinofurcula | Dinophysiales | Fensome et al. (1993) | . | ICBN |
| Dinomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dinonemertes | Pelagica | Gibson (1995) | . | ICZN |
| Dinophora | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dinophysis | Dinophysiales | Fensome et al. (1993) | . | ICBN |
| Dinopium | Piciformes | Clements (2007) | . | ICZN |
| Dinoroseobacter | Rhodobacterales | Biebl et al. (2005) | . | ICNB |
| Dinosperma | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Dinosphaera | | Fensome et al. (1993) | Domain Eucarya - Phylum Dinozoa - Class Dinophyceae - Subclass Peridiniphycidae. | ICBN |
| Dinothrix | Phytodiniales | Fensome et al. (1993) | . | ICBN |
| Dintera | Lamiales | Mabberley (2008) | Linderniaceae. | ICBN |
| Dinteranthus | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Diobelonella | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Dioclea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Diodia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Diodogorgia | Alcyonacea | Bayer (1981) | Anthothelidae. | ICZN |
| Diodontium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dioecrescis | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Diogenesia | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Diogoa | Santalales | Mabberley (2008) | Olacaceae. | ICBN |
| Dioicodendron | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Diomedea | Procellariiformes | Clements (2007) | . | ICZN |
| Diomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dionaea | Caryophyllales | Mabberley (2008) | Droseraceae. | ICBN |
| Dioncophyllum | Caryophyllales | Mabberley (2008) | Dioncophyllaceae. | ICBN |
| Dione | Bangiales | Schneider & Wynne (2007) | . | ICBN |
| Dionisia | Haemospororida | Perkins et al. (2000) | . | ICZN |
| Dionycha | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dionychastrum | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dionysia | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Dioon | Cycadales | Mabberley (2008); Christenhusz et al. (2011) | . | ICBN |
| Diophryopsis | Euplotida | Lynn (2008) | . | ICZN |
| Diophrys | Euplotida | Lynn (2008) | . | ICZN |
| Diopisthoporus | Acoela | Dörjes (1968); Faubel & Noreña (2001) | . | ICZN |
| Dioplitophrya | Haptorida | Lynn (2008) | . | ICZN |
| Diopsittaca | Psittaciformes | Clements (2007) | . | ICZN |
| Diopsonemertes | Eumonostilifera | Chernyshev (2005); Kajihara (2007); Kajihara et al. (2008) | Poseidonemertidae. | ICZN |
| Diora | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Dioscorea | Dioscoreales | Mabberley (2008) | Dioscoreaceae. | ICBN |
| Dioscoreophyllum | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Diosma | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Diospyros | Ericales | Mabberley (2008) | Ebenaceae. | ICBN |
| Diostea | Lamiales | Mabberley (2008) | Verbenaceae. | ICBN |
| Dioxys | Mischococcales | Ettl (1978) | . | ICBN |
| Dipartiella | Mobilida | Lynn (2008) | . | ICZN |
| Dipelta | Dipsacales | Mabberley (2008) | Caprifoliaceae. | ICBN |
| Dipentodon | Huerteales | Mabberley (2008) | Dipentodontaceae. | ICBN |
| Diphascon | Parachela | Kinchin (1994) | . | ICZN |
| Diphasia | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Diphyes | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Diphylax | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diphylla | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Diphyllarium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Diphylleia | Diphylleida | Cavalier-Smith (2003) | . | ICZN |
| Diphylleia | Ranunculales | Mabberley (2008) | Berberidaceae. | ICBN |
| Diphysa | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Diphyscium | Diphysciales | Goffinet et al. (2009) | . | ICBN |
| Diplacrum | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Diplarche | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Diplarpea | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Diplarrhena | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Diplasia | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Diplasiolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Diplaspis | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Diplastrella | Hadromerida | Rützler (2002) | . | ICZN |
| Diplatia | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Diplauxis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Diplaziopsis | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Diplazium | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Diplazoptilon | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Diplectria | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dipleuchlanis | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Dipleurosoma | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Diplites | Haptorida | Lynn (2008) | . | ICZN |
| Diploastrea | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Diplobatis | Torpediniformes | Nelson (2006) | . | ICZN |
| Diplobryum | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Diplocalyx | Spirochaetales | Garrity et al. (2005) | . | ICNB |
| Diplocaulobium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diplocentrum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diplochlamys | Arcellinida | Meisterfeld (2000) | Arcellina -- Microcoryciidae. | ICZN |
| Diplocladia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Diploclisia | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Diplocolea | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Diploconus | Arthracanthida | Febvre et al. (2000) | . | ICZN |
| Diplocyclos | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Diplocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Diplodactylus | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Diplodasys | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Diplodinium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Diplodiscus | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Diploeca | Craspedida | Leadbeater & Thomsen (2000) | . | ICZN |
| Diplogale | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Diploglossus | Squamata | Vitt & Caldwell (2009) | Anguidae. | ICZN |
| Diploglottis | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Diplogmus | Heterotrichida | Lynn (2008) | . | ICZN |
| Diplogromia | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Allogromiidae. | ICZN |
| Diplois | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Diplokeleba | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Diploknema | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Diplolaemus | Squamata | Vitt & Caldwell (2009) | Iguanidae. | ICZN |
| Diplolaena | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Diplolepis | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Diplolophium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Diplomeris | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diplomesodon | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Diplometopon | Squamata | Vitt & Caldwell (2009) | Trogonophidae. | ICZN |
| Diplomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Diplonema | Diplonemida | Cavalier-Smith (2003) | . | ICZN |
| Diploneuron | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Diplonympha | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Diploon | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Diplopanax | Cornales | Mabberley (2008) | Nyssaceae. | ICBN |
| Diplopelta | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Diplopeltis | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Diplophrys | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Lagynidae. | ICZN |
| Diplophrys | Thraustochytriales | Dick (2001); Kirk et al. (2008) | Thraustochytriales. | ICBN |
| Diplophyllum | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Diploplastron | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Diplopleura | Heteronemertea | Gibson (1995) | . | ICZN |
| Diplopodospongia | Poecilosclerida | Sim-Smith & Kelly (2011) | . | ICZN |
| Diploprora | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diplopsalis | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Diplopsalopsis | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Diplopteroides | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Diplopterygium | Gleicheniales | Christenhusz et al. (2011) | . | ICBN |
| Diplopterys | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Diplorhynchus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Diploria | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Diplorickettsia | Legionellales | Mediannikov et al. (2010) | . | ICNB |
| Diplosentis | Echinorhynchida | Amin (1985) | . | ICZN |
| Diplosiga | Craspedida | Nitsche et al. (2011) | . | ICZN |
| Diplosigopsis | Craspedida | Nitsche et al. (2011) | . | ICZN |
| Diplosoma | Aplousobranchia | Monniot & Monniot (1972); Monniot (2001) | Didemnidae. | ICZN |
| Diplosoma | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Diplospinifer | Polymorphida | Amin (1985) | . | ICZN |
| Diplospora | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Diplostephium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Diplostigma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Diplotaenia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Diplotaxis | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Diplothamnion | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Diplotheca | Acanthoecida | Leadbeater & Thomsen (2000); Doweld (2003); Özdikmen (2009) | Later homonym. Substituted by Didymoeca. | ICZN |
| Diplothrix | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Diplotropis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Diplulmaris | Semaeostomeae | Kramp (1961) | . | ICZN |
| Diplusodon | Myrtales | Mabberley (2008) | Lythraceae. | ICBN |
| Dipodillus | Rodentia | Musser & Carleton (2005) | . | ICZN |
| Dipodium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dipodomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dipogon | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dipoma | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Diporiphora | Squamata | Vitt & Caldwell (2009) | Agamidae. | ICZN |
| Diposis | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dipsacus | Dipsacales | Mabberley (2008) | Caprifoliaceae. | ICBN |
| Dipsadoboa | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dipsas | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dipsina | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dipsochelys | Testudinata | Vitt & Caldwell (2009) | Testudinidae. | ICZN |
| Dipsosaurus | Squamata | Vitt & Caldwell (2009) | Iguanidae. | ICZN |
| Dipteranthus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dipteris | Gleicheniales | Christenhusz et al. (2011) | . | ICBN |
| Dipterocarpus | Malvales | Mabberley (2008) | Dipterocarpaceae. | ICBN |
| Dipterocladia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dipterocolax | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dipterocome | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dipterocypsela | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dipteropeltis | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Dipterosiphonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dipterygium | Brassicales | Mabberley (2008) | Cleomaceae. | ICBN |
| Dipteryx | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dipturus | Rajiformes | Nelson (2006) | . | ICZN |
| Diptychandra | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Diptychocarpus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dipurena | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dipus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dipyrena | Lamiales | Mabberley (2008) | Verbenaceae. | ICBN |
| Dirachma | Rosales | Mabberley (2008) | Dirachmaceae. | ICBN |
| Dirca | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Dirhamphis | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Dirhynchocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Disa | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Disanthus | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Discammina | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discamminidae. | ICZN |
| Discamoeba | Vannellida | Rogerson & Patterson (2000); Smirnov et al. (2005) | Vannellidae. | ICZN |
| Discanomalina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Gavelinellidae. | ICZN |
| Discaria | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Discelium | Funariales | Goffinet et al. (2009) | . | ICBN |
| Dischidia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dischidodactylus | Anura | Vitt & Caldwell (2009) | Brachycephalidae. | ICZN |
| Dischisma | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Dischistocalyx | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Disciphania | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Discobotellina | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hemisphaeramminidae. | ICZN |
| Discocactus | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Discocalyx | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Discocapnos | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Discocarpus | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Discocelis | Discocelida | Cavalier-Smith (2003) | . | ICZN |
| Discocephalus | Euplotida | Lynn (2008) | . | ICZN |
| Discoclaoxylon | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Discocleidion | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Discocnide | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Discodeles | Anura | Vitt & Caldwell (2009) | Ceratobatrachidae. | ICZN |
| Discodermia | | Pisera & Lévi (2002) | Domain Eucarya - Kingdom Animalia - Phylum Porifera - Class Demospongiae (lithistids) Theonellidae. | ICZN |
| Discoglossus | Anura | Vitt & Caldwell (2009) | Alytidae. | ICZN |
| Discoglypremna | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Discogypsina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Acervulinidae. | ICZN |
| Discolobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Discomedusa | Semaeostomeae | Kramp (1961) | . | ICZN |
| Discomonas | | Howe et al. (2011) | Domain Eucarya - Phylum Cercozoa - Class Imbricatea. | ICZN |
| Discomorphella | Odontostomatida | Lynn (2008) | . | ICZN |
| Disconorbis | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discorbidae. | ICZN |
| Discophora | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Discophrya | Evaginogenida | Lynn (2008) | . | ICZN |
| Discophryson | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Discoplastis | Euglenales | Triemmer et al. (2006) | . | ICBN |
| Discopodium | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Discopyge | Torpediniformes | Nelson (2006) | . | ICZN |
| Discoramulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Discorbia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cibicididae. | ICZN |
| Discorbinella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discorbinellidae. | ICZN |
| Discorbinoides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glabratellidae. | ICZN |
| Discorbis | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discorbidae. | ICZN |
| Discorbitina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discorbinellidae. | ICZN |
| Discorhabdella | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Discorhyncus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Discosoma | Corallimorpharia | Fautin et al. (2007) | . | ICZN |
| Discosomatella | Evaginogenida | Lynn (2008) | . | ICZN |
| Discospermum | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Discosphaera | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | Rhabdosphaeraceae. | ICBN |
| Discospirina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discospirinidae. | ICZN |
| Discosura | Apodiformes | Clements (2007) | . | ICZN |
| Discotheca | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Discotricha | Microthoracida | Lynn (2008) | . | ICZN |
| Discozoon | Tetrahymenida | Lynn (2008) | . | ICZN |
| Discretitheca | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Discyphus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diselma | Cupressales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Disematostoma | Peniculida | Lynn (2008) | . | ICZN |
| Disepalum | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Disocactus | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Disolenia | Spumellaria | Anderson et al. (2000) | . | ICZN |
| Disparago | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Disperis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dispholidus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Disphyma | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Dispiron | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Disporopsis | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Disporum | Liliales | Mabberley (2008) | Colchicaceae. | ICBN |
| Dissanthelium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dissiliaria | Malpighiales | Mabberley (2008) | Picrodendraceae. | ICBN |
| Dissocarpus | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Dissochaeta | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dissochondrus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dissodinium | | Fensome et al. (1993); Skovgaard et al. (2007) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Dinozoa - Class Dinophyceae. Former Blastodiniales. | ICBN |
| Dissodium | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Dissomeria | Malpighiales | Mabberley (2008) | Salicaceae. | ICBN |
| Dissonema | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Dissothigma | Prorodontida | Lynn (2008) | . | ICZN |
| Dissothrix | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dissotis | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Dissotrocha | Bdelloida | Segers (2002); Segers (2007) | . | ICZN |
| Distaplia | Aplousobranchia | Monniot & Monniot (1972); Kott (1998); Monniot (2001) | Holozoidae. | ICZN |
| Distarcon | Exogenida | Lynn (2008) | . | ICZN |
| Disteganthus | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Distemonanthus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Distephanus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Disterigma | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Distichia | Poales | Mabberley (2008) | Juncaceae. | ICBN |
| Distichirrhops | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Distichium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Distichlis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Distichochlamys | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Distichogorgia | Alcyonacea | Bayer (1981) | Chrysogorgiidae. | ICZN |
| Distichopathes | Antipatharia | Opresko (2004) | . | ICZN |
| Distichophyllidium | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Distichophyllum | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Distichopora | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Distichoptilum | Pennatulacea | Williams (1995) | . | ICZN |
| Distichoselinum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Distichostemon | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Distigma | | Leedale (1967); Leedale (2000); Busse & Preisfeld (2003) | Domain Eucarya - Phylum Euglenozoa - Class Euglenophyceae (closely related to Rhabdomonadales). | ICBN |
| Distigmopsis | Eutreptiales | Leedale (1967); Leedale (2000) | . | ICBN |
| Distoechurus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Distomatopyxis | Arcellinida | Meisterfeld (2000) | Difflugina -- Distomatopyxidae. | ICZN |
| Distomus | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Styelidae. | ICZN |
| Distrianthes | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Distyliopsis | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Distylium | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Distylodon | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Disynaphia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Disynstemon | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Disyringa | Astrophorida | Uriz (2002) | . | ICZN |
| Ditassa | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Ditaxis | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Ditaxodon | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Ditepalanthus | Santalales | Mabberley (2008) | Balanophoraceae. | ICBN |
| Dithyrea | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dithyrostegia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ditoxum | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Ditria | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Ditrichomonas | Honigbergiellida | Cepicka et al. (2010) | . | ICZN |
| Ditrichopsis | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Ditrichum | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Ditrypanocystis | Archigregarinorida | Perkins et al. (2000); Rueckert & Leander (2009) | Selenidiidae. | ICZN |
| Ditrysinia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Ditta | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dittoceras | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dittrichia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ditypophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Diuca | Passeriformes | Clements (2007) | . | ICZN |
| Diuris | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Diuronotus | Chaetonotida | Balsamo et al. (2009); Hummon & Todaro (2010) | . | ICZN |
| Divanella | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Dives | Passeriformes | Clements (2007) | . | ICZN |
| Dixiphia | Passeriformes | Clements (2007) | . | ICZN |
| Dixonia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dixoniella | Dixoniellales | Schneider & Wynne (2007); Yokoyama et al. (2009) | . | ICBN |
| Dixonius | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Diyaminauclea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dizygostemon | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Djaloniella | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Djinga | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Dobellia | Piroplasmorida | Perkins et al. (2000) | . | ICZN |
| Dobera | Brassicales | Mabberley (2008) | Salvadoraceae. | ICBN |
| Dobinea | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Dobsonia | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Docidium | Desmidiales | Gontcharov (2008) | . | ICBN |
| Doconestes | Lyssacinosida | Tabachnick (2002) | . | ICZN |
| Docosaccus | Lyssacinosida | Tabachnick (2002) | . | ICZN |
| Docynia | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Dodartia | Lamiales | Mabberley (2008) | Phrymaceae. | ICBN |
| Dodecadenia | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Dodecadicyema | Dicyemida | Furuya et al. (2007) | . | ICZN |
| Dodecahema | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Dodecastigma | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dodecatheon | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Dodonaea | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Dodsonia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Doellia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Doellingeria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Doerpfeldia | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Dofleinia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Dogania | Testudinata | Vitt & Caldwell (2009) | Trionychidae. | ICZN |
| Dogelodinium | Syndinida | Fensome et al. (1993) | . | ICZN |
| Dogielella | Tetrahymenida | Lynn (2008) | . | ICZN |
| Dohrniella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dokdonella | Xanthomonadales | Yoon et al. (2006) | . | ICNB |
| Dokdonia | Flavobacteriales | Yoon et al. (2005) | . | ICNB |
| Dokonemertes | Heteronemertea | Gibson (1995) | . | ICZN |
| Dolianthus | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dolichacantha | Poecilosclerida | Hooper (2002) | . | ICZN |
| Dolichandra | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Dolichandrone | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Dolichlasium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dolichodasys | Macrodasyida | Hummon & Todaro (2010) | . | ICZN |
| Dolichodelphys | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dolichodinium | Gonyaulacales | Fensome et al. (1993) | . | ICBN |
| Dolicholobium | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dolicholoma | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Dolichomastix | Dolichomastigales | Marin & Melkonian (2010) | . | ICBN |
| Dolichometra | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dolichomitra | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dolichomitriopsis | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Dolichonyx | Passeriformes | Clements (2007) | . | ICZN |
| Dolichopetalum | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dolichopsis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dolichorrhiza | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dolichos | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dolichoscelis | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dolichospermum | Nostocales | Wacklin et al. (2009) | . | ICBN |
| Dolichostachys | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Dolichostemon | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Dolichothrix | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dolichotis | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dolichoura | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Doliocarpus | Dilleniales | Mabberley (2008) | Dilleniaceae. | ICBN |
| Doliocatella | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Dolioletta | Doliolida | Godeaux (1998) | . | ICZN |
| Doliolina | Doliolida | Godeaux (1998) | . | ICZN |
| Dolioloides | Doliolida | Godeaux (1998) | . | ICZN |
| Doliolum | Doliolida | Godeaux (1998) | . | ICZN |
| Doliopsis | Doliolida | Neumann (1913); Godeaux (1998); Godeaux & Harbison (2003) | . | ICZN |
| Doliopsoides | Doliolida | Godeaux (1998) | . | ICZN |
| Doliornis | Passeriformes | Clements (2007) | . | ICZN |
| Doliospora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dolium | Sphenomonadales | Leedale (2000) | . | ICBN |
| Dollfusentis | Echinorhynchida | Amin (1985) | . | ICZN |
| Dologale | Carnivora | Wozencraft (2005) | . | ICZN |
| Dolomiaea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dolosicoccus | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Dolosigranulum | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Dolospingus | Passeriformes | Clements (2007) | . | ICZN |
| Dolotortula | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Domadracunculus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dombeya | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Domeykoa | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Domingoa | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Donacobius | Passeriformes | Clements (2007) | . | ICZN |
| Donacospiza | Passeriformes | Clements (2007) | . | ICZN |
| Donatia | Asterales | Mabberley (2008) | Stylidiaceae. | ICBN |
| Donax | Zingiberales | Mabberley (2008) | Marantaceae. | ICBN |
| Donghaeana | Flavobacteriales | Yoon et al. (2006) | . | ICNB |
| Donghicola | Rhodobacterales | Yoon et al. (2007) | . | ICNB |
| Dongia | Rhodospirillales | Liu et al. (2010) | . | ICNB |
| Doniophyton | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Donnellia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Donnellsmithia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Donneria | Ploima | De Smet (2003); Segers (2007) | . | ICZN |
| Donrichardsia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Donsissonia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Eponididae. | ICZN |
| Dontostemon | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dopatrium | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Dorataspis | Arthracanthida | Febvre et al. (2000) | . | ICZN |
| Doratoxylon | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Dorcatragus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Dorcopsis | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dorcopsulus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dorea | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Dorema | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Doricera | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Doricha | Apodiformes | Clements (2007) | . | ICZN |
| Dorisa | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Dorisiella | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Dorobaea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Doronicum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dorotheanthus | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Dorria | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Dorstenia | Rosales | Mabberley (2008) | Moraceae. | ICBN |
| Doryanthes | Asparagales | Mabberley (2008) | Doryanthaceae. | ICBN |
| Dorycnium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dorycnopsis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Doryfera | Apodiformes | Clements (2007) | . | ICZN |
| Doryopteris | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Doryphora | Laurales | Mabberley (2008) | Atherospermataceae. | ICBN |
| Doryphoribius | Parachela | Kinchin (1994) | . | ICZN |
| Dorystoechas | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Dorystoma | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Doryxylon | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dosilia | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Dossinia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dotona | Hadromerida | Rützler (2002) | . | ICZN |
| Dotyella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Dotyophycus | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Douepea | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Douinia | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Douradoa | Santalales | Mabberley (2008) | Olacaceae. | ICBN |
| Dovyalis | Malpighiales | Mabberley (2008) | Salicaceae. | ICBN |
| Downingia | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Doxodasya | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Doyerea | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Doyrana | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992); Özdikmen (2009) | Bagginidae. Substitute name for Natlandia. | ICZN |
| Dozya | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Draba | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Drabastrum | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dracaena | Squamata | Vitt & Caldwell (2009) | Teiidae. | ICZN |
| Dracaena | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Drachiella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Draco | Squamata | Vitt & Caldwell (2009) | Agamidae. | ICZN |
| Dracocephalum | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Dracoderes | Cyclorhagida | Higgins & Shirayama (1990) | . | ICZN |
| Dracoglossum | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dracomonticola | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dracontioides | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Dracontium | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Dracontomelon | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Dracophilus | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Dracophyllum | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Dracosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dracula | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Draculiciteria | Chaetonotida | Balsamo et al. (2009); Hummon & Todaro (2010) | . | ICZN |
| Dracunculus | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Dragescoa | Pleuronematida | Lynn (2008) | . | ICZN |
| Dragescozoon | Colpodida | Lynn (2008) | . | ICZN |
| Dragmacidon | Halichondrida | Alvarez & Hooper (2002) | . | ICZN |
| Dragmatella | Poecilosclerida | Hajdu & Van Soest (2002) | . | ICZN |
| Dragmaxia | Halichondrida | Alvarez & Hooper (2002) | . | ICZN |
| Drakaea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Drake-Brockmania | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dransfieldia | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Draperia | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Drapetes | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Dravidogecko | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Dregea | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dregeochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dremomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Drepanobanda | Reptantia | Gibson (1995) | . | ICZN |
| Drepanocaryum | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Drepanocladus | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Drepanogigas | Reptantia | Gibson (1995) | . | ICZN |
| Drepanoides | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Drepanolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Drepanomonas | Microthoracida | Lynn (2008) | . | ICZN |
| Drepanophorella | Reptantia | Gibson (1995) | . | ICZN |
| Drepanophoresta | Reptantia | Gibson (1995); Kajihara et al. (2008) | Junior synonym of Drepanophorella. | ICZN |
| Drepanophoria | Reptantia | Gibson (1995); Kajihara et al. (2008) | Junior synonym of Drepanophorella. | ICZN |
| Drepanophoriella | Reptantia | Gibson (1995) | . | ICZN |
| Drepanophorina | Reptantia | Gibson (1995) | . | ICZN |
| Drepanophoringia | Reptantia | Gibson (1995); Kajihara et al. (2008) | Junior synonym of Drepanophorella. | ICZN |
| Drepanophorus | Reptantia | Gibson (1995) | . | ICZN |
| Drepanoptila | Columbiformes | Clements (2007) | . | ICZN |
| Drepanorhynchus | Passeriformes | Clements (2007) | . | ICZN |
| Drepanostachyum | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dreptes | Passeriformes | Clements (2007) | . | ICZN |
| Dresslerella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dressleria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dresslerothamnus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Drewiana | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Driessenia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Drifa | Alcyonacea | Bayer (1981) | Nephtheidae. | ICZN |
| Drillactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Drilocineta | Thigmotrichida | Lynn (2008) | . | ICZN |
| Drilophaga | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Drimia | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Drimycarpus | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Drimys | Canellales | Mabberley (2008) | Winteraceae. | ICBN |
| Droceloncia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Droguetia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Dromaeocercus | Passeriformes | Clements (2007) | . | ICZN |
| Dromaius | Struthioniformes | Clements (2007) | . | ICZN |
| Dromalia | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Dromas | Charadriiformes | Clements (2007) | . | ICZN |
| Dromiciops | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Dromicodryas | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dromococcyx | Cuculiformes | Clements (2007) | . | ICZN |
| Dromophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Droogmansia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Drosanthemum | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Drosera | Caryophyllales | Mabberley (2008) | Droseraceae. | ICBN |
| Drosophyllum | Caryophyllales | Mabberley (2008) | Drosophyllaceae. | ICBN |
| Drouetia | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Drucella | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Drulia | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Drummondia | Scouleriales | Goffinet et al. (2009) | . | ICBN |
| Drummondita | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Druppatractus | Spumellaria | Anderson et al. (2000) | . | ICZN |
| Drusa | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dryadella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dryadodaphne | Laurales | Mabberley (2008) | Atherospermataceae. | ICBN |
| Dryadophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dryadorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dryandra | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Dryas | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Drymarchon | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Drymaria | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Drymoanthus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Drymobius | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Drymocichla | Passeriformes | Clements (2007) | . | ICZN |
| Drymoda | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Drymodes | Passeriformes | Clements (2007) | . | ICZN |
| Drymoluber | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Drymonema | Semaeostomeae | Kramp (1961) | . | ICZN |
| Drymonia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Drymophila | Passeriformes | Clements (2007) | . | ICZN |
| Drymophila | Liliales | Mabberley (2008) | Luzuriagaceae. | ICBN |
| Drymophloeus | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Drymoreomys | Rodentia | Percequillo et al. (2011) | . | ICZN |
| Drymornis | Passeriformes | Clements (2007) | . | ICZN |
| Drynaria | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dryobalanops | Malvales | Mabberley (2008) | Dipterocarpaceae. | ICBN |
| Dryocalamus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dryocopus | Piciformes | Clements (2007) | . | ICZN |
| Dryodora | Cydippida | Harbison & Madin (1982) | . | ICZN |
| Dryolimnas | Gruiformes | Clements (2007) | . | ICZN |
| Dryomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Dryopetalon | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Dryophiops | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dryopoa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Dryopolystichum | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dryopsis | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dryopteris | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Dryoscopus | Passeriformes | Clements (2007) | . | ICZN |
| Dryotriorchis | Falconiformes | Clements (2007) | . | ICZN |
| Drypetes | Malpighiales | Mabberley (2008) | Putranjivaceae. | ICBN |
| Drypis | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Dryptodon | Grimmiales | Goffinet et al. (2009) | . | ICBN |
| Drysdalia | Squamata | Mattison (2007); Vitt & Caldwell (2009) | Serpentes. Elapidae. Not "Drysadalia". | ICZN |
| Duabanga | Myrtales | Mabberley (2008) | Lythraceae. | ICBN |
| Dubautia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Duberria | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Dublinia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Asterigerinatidae. | ICZN |
| Duboisia | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Duboscia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Duboscqia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Duboscquella | | Fensome et al. (1993); Coats et al. (2012) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Dinozoa - Class Dinophyceae. | ICBN |
| Duboscquodinium | | Fensome et al. (1993); Coats et al. (2010) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Dinozoa - Class Dinophyceae. | ICBN |
| Dubouzetia | Oxalidales | Mabberley (2008) | Elaeocarpaceae. | ICBN |
| Dubridinium | Peridiniales | Fensome et al. (1993) | Holocene. | ICBN |
| Dubusia | Passeriformes | Clements (2007) | . | ICZN |
| Dubyaea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ducellieria | Leptomitales | Dick (2001); Kirk et al. (2008) | Ducellieriaceae. | ICBN |
| Ducellieria | Mischococcales | Ettl (1978); Greuter et al. (1993) | Not Ducelliera (Greuter et al., 1993). | ICBN |
| Duckeanthus | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Duckeella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Duckeodendron | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Duckerella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Duckesia | Malpighiales | Mabberley (2008) | Humiriaceae. | ICBN |
| Ducrosia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Ducula | Columbiformes | Clements (2007) | . | ICZN |
| Dudleya | Saxifragales | Mabberley (2008) | Crassulaceae. | ICBN |
| Dudresnaya | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Duellmanohyla | Anura | Vitt & Caldwell (2009) | Hylidae. | ICZN |
| Dufrenoya | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Duganella | Burkholderiales | Garrity et al. (2005) | . | ICNB |
| Dugesia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dugong | Sirenia | McKenna & Bell (1997) | . | ICZN |
| Duguetia | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Duhaldea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Duidaea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Duidania | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dujardina | Glissomonadida | Howe et al. (2011) | . | ICZN |
| Dulacia | Santalales | Mabberley (2008) | Olacaceae. | ICBN |
| Dulichium | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Dulus | Passeriformes | Clements (2007) | . | ICZN |
| Dumasia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dumbbellicephalus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Dumetella | Passeriformes | Clements (2007) | . | ICZN |
| Dumetia | Passeriformes | Clements (2007) | . | ICZN |
| Dumontia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Dumortiera | Marchantiales | Crandall-Stotler et al. (2009) | . | ICBN |
| Dumus | Aplousobranchia | Monniot & Monniot (1972); Kott (1998) | Ritterellidae. | ICZN |
| Dunalia | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Dunbaria | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Duncanopsammia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Dunnia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dunocyathus | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Dunstervillea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Duosclera | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Duosnemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Duosperma | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Duparquetia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Duperrea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Duplella | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ellipsolagenidae. | ICZN |
| Duplipetala | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Dupontia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Duranta | Lamiales | Mabberley (2008) | Verbenaceae. | ICBN |
| Durchoniella | Astomatida | Lynn (2008) | . | ICZN |
| Durinskia | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Durio | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Duroia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Durringtonia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Dusenburyina | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Dusenburyinidae. | ICZN |
| Duseniella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dushia | Heteronemertea | Gibson (1995) | . | ICZN |
| Dusicyon | Carnivora | Wozencraft (2005) | Recently extinct. | ICZN |
| Dussia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dutailliopsis | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Dutaillyea | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Duthiastrum | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Duthiea | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Duthiella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Duttaphrynus | Anura | Vitt & Caldwell (2009) | Bufonidae. | ICZN |
| Duva | Alcyonacea | Bayer (1981) | Nephtheidae. | ICZN |
| Duvalia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Duvaliandra | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dyacopterus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Dyadobacter | Cytophagales | Garrity et al. (2005); Ludwig et al. (2011) | . | ICNB |
| Dyakia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Dyckia | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Dyella | Xanthomonadales | Xie & Yokota (2005) | . | ICNB |
| Dyera | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Dyerophytum | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Dylakosoma | Sphenomonadales | Leedale (1967); Leedale (2000) | . | ICBN |
| Dymecodon | Soricomorpha | Hutterer (2005) | . | ICZN |
| Dymondia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dynamena | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Dyocibicides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cibicididae. | ICZN |
| Dypsis | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Dyschoriste | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Dyscophus | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Dyscritothamnus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dysgonomonas | Bacteroidales | Garrity et al. (2005) | . | ICNB |
| Dysidea | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Dysithamnus | Passeriformes | Clements (2007) | . | ICZN |
| Dysnectes | | Yubuki et al. (2007) | Domain Eucarya - Phylum Metamonada - Subphylum Trichozoa (Fornicata). | ICZN |
| Dysodiopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dysolobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Dysopsis | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Dysosma | Ranunculales | Mabberley (2008) | Berberidaceae. | ICBN |
| Dysoxylum | Sapindales | Mabberley (2008) | Meliaceae. | ICBN |
| Dysphania | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Dyssodia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Dystactotylos | Euonychophora | Reid (1996) | Peripatopsidae. | ICZN |
| Dystaenia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Dysteria | Dysteriida | Lynn (2008) | . | ICZN |
| Dysterioides | | Lynn (2008) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Ciliophora - Class Phyllopharyngea - Subclass Cyrtophoria. | ICZN |
| Dystovomita | Malpighiales | Mabberley (2008) | Guttiferae. | ICBN |
| Dzensia | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| E | |
| Earina | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Earlandammina | Trochamminida | Kaminski (2000) | Trochamminellinae, Trochamminacea. | ICZN |
| Earleria | Leptothecata | Bouillon et al. (2006); Collins et al. (2006) | Replacement name for Foersteria. | ICZN |
| Eastwoodia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eatonella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ebenavia | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Ebenopsis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Ebenus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eberhardtia | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Eberlanzia | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Ebracteola | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Ebria | Ebriida | Patterson et al. (2000) | . | ICZN |
| Ecballium | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Ecclinusa | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Eccoptocarpha | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eccremidium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Eccremis | Asparagales | Mabberley (2008) | Hemerocallidaceae. | ICBN |
| Eccremocarpus | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Eccrinidus | Ichthyophonida | Cafaro (2005); Kirk et al. (2008) | Eccrinales in mycology. | ICZN |
| Eccrinoides | Ichthyophonida | Kirk et al. (2008) | Eccrinales in mycology. | ICZN |
| Ecdeiocolea | Poales | Mabberley (2008) | Ecdeiocoleaceae. | ICBN |
| Echeandia | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Echeveria | Saxifragales | Mabberley (2008) | Crassulaceae. | ICBN |
| Echidnopsis | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Echimys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Echinacanthus | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Echinacea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Echinactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Echinamoeba | Echinamoebida | Rogerson & Patterson (2000); Smirnov et al. (2005); Smirnov et al. (2011) | . | ICZN |
| Echinanthera | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Echinichona | Cryptogemmida | Lynn (2008) | . | ICZN |
| Echinicola | Cytophagales | Nedashkovskaya et al. (2006); Ludwig et al. (2011) | . | ICNB |
| Echinidinium | Peridiniales | Head et al. (2001) | . | ICBN |
| Echiniscoides | Echiniscoidea | Kinchin (1994) | . | ICZN |
| Echiniscus | Echiniscoidea | Kinchin (1994) | . | ICZN |
| Echinisis | Alcyonacea | Bayer (1981) | Isididae. | ICZN |
| Echinocactus | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Echinocereus | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Echinochalina | Poecilosclerida | Hooper (2002) | . | ICZN |
| Echinochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Echinoclathria | Poecilosclerida | Hooper (2002) | . | ICZN |
| Echinoclinum | Aplousobranchia | Monniot & Monniot (1972); Kott (1998) | Junior synonym of Lissoclinum. | ICZN |
| Echinococcidium | Piroplasmorida | Perkins et al. (2000) | . | ICZN |
| Echinocodon | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Echinocolea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Echinocoleum | Chlorellales | Pažoutová et al. (2010) | As Oocystis-clade or Oocystaceae. | ICBN |
| Echinocoryne | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Echinocyclidium | Pleuronematida | Lynn (2008) | . | ICZN |
| Echinocystis | Pterocystida | Mikrjukov et al. (2000); Yabuki et al. (2012) | Pterocystidae. | ICZN |
| Echinocystis | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Echinoderes | Cyclorhagida | Higgins (1990) | . | ICZN |
| Echinodictyum | Poecilosclerida | Hooper (2002) | . | ICZN |
| Echinodium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Echinodorus | Alismatales | Mabberley (2008) | Alismataceae. | ICBN |
| Echinofolliculina | Heterotrichida | Lynn (2008) | . | ICZN |
| Echinogorgia | Alcyonacea | Bayer (1981) | Plexauridae. | ICZN |
| Echinolaena | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Echinolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Echinomera | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Echinomorpha | Scleractinia | Veron (2000) | . | ICZN |
| Echinomuricea | Alcyonacea | Bayer (1981) | Plexauridae. | ICZN |
| Echinoocysta | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Echinopepon | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Echinophora | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Echinophrya | Evaginogenida | Lynn (2008) | . | ICZN |
| Echinophycus | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Echinophyllia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Echinopogon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Echinopora | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Echinoprocta | Rodentia | Woods & Kilpatrick (2005) | . | ICZN |
| Echinops | Afrosoricida | McKenna & Bell (1997); Stanhope et al. (1998) | Tenrecidae. | ICZN |
| Echinops | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Echinopsis | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Echinopterys | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Echinoptilum | Pennatulacea | Williams (1995) | . | ICZN |
| Echinorhinus | Echinorhiniformes | Nelson (2006) | . | ICZN |
| Echinorhynchoides | Echinorhynchida | Amin (1985) | . | ICZN |
| Echinorhynchus | Echinorhynchida | Amin (1985) | . | ICZN |
| Echinosaura | Squamata | Vitt & Caldwell (2009) | Gymnophthalmidae. | ICZN |
| Echinosociella | Pleuronematida | Lynn (2008) | . | ICZN |
| Echinosorex | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Echinospartum | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Echinospongilla | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Echinosporangium | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Echinosteliopsis | Echinosteliopsidales | Olive (1970); Cavalier-Smith et al. (2004) | . | ICBN |
| Echinostelium | Echinosteliales | Yamamoto (1998) | . | ICBN |
| Echinostephia | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Echinostrombidium | Strombidiida | Lynn (2008) | . | ICZN |
| Echinostylinos | Poecilosclerida | Van Soest & Hajdu (2002) | . | ICZN |
| Echinothamnion | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Echinotriton | Caudata | Vitt & Caldwell (2009) | Salamandridae. | ICZN |
| Echinozoon | Piroplasmorida | Perkins et al. (2000) | . | ICZN |
| Echiochilon | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Echiopsis | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Echiostachys | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Echiothrix | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Echis | Squamata | Vitt & Caldwell (2009) | Serpentes. Viperidae. | ICZN |
| Echites | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Echium | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Echiurocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Echymipera | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Ecionemia | Astrophorida | Uriz (2002) | . | ICZN |
| Eclectus | Psittaciformes | Clements (2007) | . | ICZN |
| Eclipta | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ecnomiohyla | Anura | Vitt & Caldwell (2009) | Hylidae. | ICZN |
| Ecpleopus | Squamata | Vitt & Caldwell (2009) | Gymnophthalmidae. | ICZN |
| Ecpoma | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Ectadium | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Ecteinascidia | Phlebobranchia | Monniot & Monniot (1972); Monniot (2001) | Perophoridae. | ICZN |
| Ectophora | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Ectophylla | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Ectopleura | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Ectopopterys | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Ectothiorhodosinus | Chromatiales | Gorlenko et al. (2004) | . | ICNB |
| Ectothiorhodospira | Chromatiales | Garrity et al. (2005) | . | ICNB |
| Ectotropis | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Ectrogella | | Dick (2001); Kirk et al. (2008) | Domain Eucarya - Kingdom Straminipila - Phylum Oomycota. Ectrogellaceae. | ICBN |
| Ectropotheciella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Ectropotheciopsis | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Ectropothecium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Ectrosia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Ectyonopsis | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Ectyoplasia | Poecilosclerida | Hooper (2002) | . | ICZN |
| Ecua | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Ecuadendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Edalorhina | Anura | Vitt & Caldwell (2009) | Leiuperidae. | ICZN |
| Edaphobacter | Acidobacteriales | Koch et al. (2008); Fukunaga et al. (2008) | . | ICNB |
| Edaphonobiotus | Tectofilosida | Meisterfeld (2000); Cavalier-Smith & Chao (2003) | Psammonobiotidae. | ICZN |
| Edaphospathula | Haptorida | Lynn (2008) | . | ICZN |
| Edentostomina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ophthalmidiidae. | ICZN |
| Edgaria | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Edgertonia | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Baculellidae. | ICZN |
| Edgeworthia | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Edhazardia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Edithcolea | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Edmondia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Edmondsacanthus | Echinorhynchida | Smales (2009) | Rhadinorhynchidae. | ICZN |
| Edmundoa | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Edraianthus | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Edwardsia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Edwardsianthus | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Edwardsiella | Enterobacteriales | Garrity et al. (2005) | . | ICNB |
| Edwardsiella | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Efflatounaria | Alcyonacea | Bayer (1981) | Xeniidae. | ICZN |
| Effluviibacter | Cytophagales | Suresh et al. (2006); Ludwig et al. (2011) | . | ICNB |
| Efulensia | Malpighiales | Mabberley (2008) | Passifloraceae. | ICBN |
| Egeria | Alismatales | Mabberley (2008) | Hydrocharitaceae. | ICBN |
| Egernia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eggelingia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eggerella | Textulariida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Eggerellidae. | ICZN |
| Eggerelloides | Textulariida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Eggerellidae. | ICZN |
| Eggerthella | Coriobacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Eggerthia | Erysipelotrichales | Salvetti et al. (2011) | . | ICNB |
| Egleria | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Egletes | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Egmundella | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Egretta | Ciconiiformes | Clements (2007) | . | ICZN |
| Eguchipsammia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Ehrenbergina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cassidulinidae. | ICZN |
| Ehrendorferia | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Ehretia | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Ehrharta | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Ehrlichia | Rickettsiales | Garrity et al. (2005) | . | ICNB |
| Eichhornia | Commelinales | Mabberley (2008) | Pontederiaceae. | ICBN |
| Eidolon | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eidothea | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Eigia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eikenella | Neisseriales | Garrity et al. (2005) | . | ICNB |
| Eilhardia | Baerida | Borojevic et al. (2002) | . | ICZN |
| Eilohedra | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Pseudoparrellidae. | ICZN |
| Eilymophrys | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Eimeria | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Einadia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Einomeia | Piperales | Mabberley (2008) | Aristolochiaceae. | ICBN |
| Eionea | Alteromonadales | Urios et al. (2011) | . | ICNB |
| Eira | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Eirene | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eirenis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Eirmocephala | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eirmodesmus | Hibberdiales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chrysocapsaceae (uniflagellate). | ICBN |
| Eitenia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eizia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Ekebergia | Sapindales | Mabberley (2008) | Meliaceae. | ICBN |
| Ekhidna | Sphingobacteriales | Alain et al. (2010) | . | ICNB |
| Ekimia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Ekmania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ekmanianthe | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Ekmaniopappus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ekmanochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Elachanthemum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elachanthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elachistocleis | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Elachistodon | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Elacholoma | Lamiales | Mabberley (2008) | Phrymaceae. | ICBN |
| Elachyptera | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Elaeagia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Elaeagnus | Rosales | Mabberley (2008) | Elaeagnaceae. | ICBN |
| Elaeis | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Elaenia | Passeriformes | Clements (2007) | . | ICZN |
| Elaeocarpus | Oxalidales | Mabberley (2008) | Elaeocarpaceae. | ICBN |
| Elaeodendron | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Elaeoluma | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Elaeomyxa | Physarales | Yamamoto (1998) | . | ICBN |
| Elaeoselinum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Elaeosticta | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Elanoides | Falconiformes | Clements (2007) | . | ICZN |
| Elanus | Falconiformes | Clements (2007) | . | ICZN |
| Elaphandra | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elaphanthera | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Elaphe | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Elaphodus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Elaphoglossum | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Elaphurus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Elapognathus | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Elapoidis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Elapomorphus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Elapotinus | Squamata | Vitt & Caldwell (2009) | Serpentes. Atractaspididae. | ICZN |
| Elapsoidea | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Elasis | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Elasmodactylus | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Elateriopsis | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Elateriospermum | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Elatine | Malpighiales | Mabberley (2008) | Elatinaceae. | ICBN |
| Elatodiscophrya | Evaginogenida | Lynn (2008) | . | ICZN |
| Elatopathes | Antipatharia | Opresko (2004) | . | ICZN |
| Elatostema | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Elattostachys | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Elburzia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Elcania | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Electostoma | Heterotrichida | Lynn (2008) | . | ICZN |
| Electron | Coraciiformes | Clements (2007) | . | ICZN |
| Elegia | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Eleiodoxa | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Eleiotis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Elekmania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eleocharis | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Eleorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eleothreptus | Caprimulgiformes | Clements (2007) | . | ICZN |
| Elephantomene | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Elephantophilus | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Elephantopus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elephantorrhiza | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Elephantulus | Macroscelidea | McKenna & Bell (1997) | . | ICZN |
| Elephas | Proboscidea | McKenna & Bell (1997) | . | ICZN |
| Elettaria | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Elettariopsis | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Eleusine | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eleutharrhena | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Eleutherandra | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Eleutheranthera | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eleutheria | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eleutherine | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Eleutherobia | Alcyonacea | Verseveldt & Bayer (1988) | Alcyoniidae. | ICZN |
| Eleutherococcus | Apiales | Mabberley (2008) | Araliaceae. | ICBN |
| Eleutherodactylus | Anura | Vitt & Caldwell (2009) | Brachycephalidae. | ICZN |
| Eleutheroschizon | Protococcidiorida | Perkins et al. (2000) | . | ICZN |
| Eleutherospermum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Eleutherostylis | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Elgaria | Squamata | Vitt & Caldwell (2009) | Anguidae. | ICZN |
| Elharveya | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eliea | Malpighiales | Mabberley (2008) | Guttiferae. | ICBN |
| Elifa | Heteronematales | Özdikmen (2009); Nakada (2010) | Later synonym of Dinematomonas. | ICBN |
| Eligmocarpus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eligmodontia | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Elina | Thraustochytriales | Dick (2001); Kirk et al. (2008) | Thraustochytriaceae. | ICBN |
| Elingamita | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Eliomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Elionurus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Elioraea | Rhodospirillales | Albuquerque et al. (2008) | . | ICNB |
| Eliptocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Elisiella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Eliurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Elizabetha | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Elizabethkingia | Flavobacteriales | Kim et al. (2005) | . | ICNB |
| Elleanthus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Elleipsisoma | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Ellenbergia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elliottia | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Ellipanthus | Oxalidales | Mabberley (2008) | Connaraceae. | ICBN |
| Ellipeia | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Ellipeiopsis | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Ellipsobulimina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Pleurostomellidae. | ICZN |
| Ellipsoglandulina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Pleurostomellidae. | ICZN |
| Ellipsoidion | Mischococcales | Ettl (1978) | . | ICBN |
| Ellipsomyxa | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Ellipsopyxella | Arcellinida | Meisterfeld (2000) | Difflugina -- Trigonopyxidae. | ICZN |
| Ellipsopyxis | Arcellinida | Meisterfeld (2000) | Difflugina -- Trigonopyxidae. | ICZN |
| Elliptochloris | | Letsch et al. (2009); Darienko et al. (2010) | Domain Eucarya - Phylum Chlorophyta - Class Trebouxiophyceae. Elliptochloris-clade. | ICBN |
| Elliptothigma | Thigmotrichida | Lynn (2008) | . | ICZN |
| Ellisella | Alcyonacea | Bayer (1981); Bayer & Grasshoff (1994) | Junior synonym of Ctenocella. | ICZN |
| Ellisia | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Ellisiophyllum | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Ellobiocystis | Thalassomycetales | Whisler (1990) | As ellobiopsids. | ICBN |
| Ellobiophrya | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Ellobiopsis | Thalassomycetales | Whisler (1990) | As ellobiopsids. | ICBN |
| Ellobius | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Elmera | Saxifragales | Mabberley (2008) | Saxifragaceae. | ICBN |
| Elmeriobryum | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Elminia | Passeriformes | Clements (2007) | . | ICZN |
| Eloactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Elodea | Alismatales | Mabberley (2008) | Hydrocharitaceae. | ICBN |
| Elongatocystis | Chlorellales | Krienitz & Bock (2011) | As Oocystis-clade or Oocystaceae. | ICBN |
| Elongisporangium | Pythiales | Uzuhashi et al. (2010) | . | ICBN |
| Elosa | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Elphidiella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Elphidiidae. | ICZN |
| Elphidium | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Elphidiidae. | ICZN |
| Elseya | Testudinata | Vitt & Caldwell (2009) | Chelidae. | ICZN |
| Elseyornis | Charadriiformes | Clements (2007) | . | ICZN |
| Elsholtzia | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Elstera | Rhodospirillales | Rahalkar et al. (2012) | . | ICNB |
| Eltaninactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Eltroplectris | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Elusimicrobium | Elusimicrobiales | Geissinger et al. (2009) | . | ICNB |
| Elusor | Testudinata | Vitt & Caldwell (2009) | Chelidae. | ICZN |
| Elvasia | Malpighiales | Mabberley (2008) | Ochnaceae. | ICBN |
| Elvira | Apodiformes | Clements (2007) | . | ICZN |
| Elymandra | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Elymus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Elythranthera | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Elytranthe | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Elytraria | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Elytropappus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Elytrophorus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Elytroplastron | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Elytropus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Elytrostachys | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Emarhendia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Embadium | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Emballonura | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Embata | Bdelloida | Segers (2002); Segers (2007) | . | ICZN |
| Embelia | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Embergeria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Emberiza | Passeriformes | Clements (2007) | . | ICZN |
| Emberizoides | Passeriformes | Clements (2007) | . | ICZN |
| Embernagra | Passeriformes | Clements (2007) | . | ICZN |
| Emblema | Passeriformes | Clements (2007) | . | ICZN |
| Emblemantha | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Emblingia | Brassicales | Mabberley (2008) | Emblingiaceae. | ICBN |
| Embolanthera | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Embothrium | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Embreea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Emelianthe | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Emex | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Emicocarpus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Emilia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Emiliania | Isochrysidales | Edvardsen et al. (2000); Jordan et al. (2004) | Noëlaerhabdaceae. | ICBN |
| Emiliella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eminia | Passeriformes | Clements (2007) | . | ICZN |
| Eminia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eminium | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Eminothigma | Thigmotrichida | Lynn (2008) | . | ICZN |
| Emmenanthe | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Emmenopterys | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Emmenosperma | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Emmeorhiza | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Emmochliophis | Squamata | Mattison (2007); Vitt & Caldwell (2009) | Serpentes. "Colubridae." Not Emmochiliopis. | ICZN |
| Emmotum | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Emoia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Emorya | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Empedobacter | Flavobacteriales | Garrity et al. (2005) | . | ICNB |
| Empetrum | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Empidonax | Passeriformes | Clements (2007) | . | ICZN |
| Empidonomus | Passeriformes | Clements (2007) | . | ICZN |
| Empidornis | Passeriformes | Clements (2007) | . | ICZN |
| Emplectanthus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Emplectonema | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Empleuridium | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Empleurum | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Empodisma | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Empodium | Asparagales | Mabberley (2008) | Hypoxidaceae. | ICBN |
| Empselium | Stylonematales | Schneider & Wynne (2007) | . | ICBN |
| Emticicia | Cytophagales | Saha & Chakrabarti (2006); Ludwig et al. (2011) | . | ICNB |
| Emydocephalus | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Emydura | Testudinata | Vitt & Caldwell (2009) | Chelidae. | ICZN |
| Emys | Testudinata | Vitt & Caldwell (2009) | Emydidae. | ICZN |
| Enallopsammia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Enantiocladia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Enantiodentalina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nodosariidae. | ICZN |
| Enantiophylla | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Enarganthe | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Enarthrocarpus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Enaulophyton | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Encalypta | Encalyptales | Goffinet et al. (2009) | . | ICBN |
| Encelia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Enceliopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Encentrum | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Encephalartos | Cycadales | Mabberley (2008); Christenhusz et al. (2011) | . | ICBN |
| Encephalitozoon | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Encephalosphaera | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Enchelaria | Haptorida | Lynn (2008) | . | ICZN |
| Enchelydium | Haptorida | Lynn (2008) | . | ICZN |
| Enchelyodon | Haptorida | Lynn (2008) | . | ICZN |
| Enchelyomorpha | Evaginogenida | Lynn (2008) | . | ICZN |
| Enchelyotricha | Haptorida | Lynn (2008) | . | ICZN |
| Enchelys | Haptorida | Lynn (2008) | . | ICZN |
| Enchisthenes | Chiroptera | Simmons (2005) | . | ICZN |
| Encholirium | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Enchylaena | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Encopella | Lamiales | Mabberley (2008) | Linderniaceae. | ICBN |
| Encyclia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Endamoeba | Mastigamoebida | Patterson et al. (2000); Cavalier-Smith et al. (2004) | . | ICZN |
| Endectyon | Poecilosclerida | Hooper (2002) | . | ICZN |
| Endemosarca | Plasmodiophorida | Kirk et al. (2008) | . | ICZN |
| Endertia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Endiandra | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Endlicheria | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Endocaulos | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Endocellion | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Endochloridion | Mischococcales | Ettl (1978) | . | ICBN |
| Endocincta | Acoela | Crezée (1975) | . | ICZN |
| Endocladia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Endocomia | Magnoliales | Mabberley (2008) | Myristicaceae. | ICBN |
| Endocyathopora | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Endodesmia | Malpighiales | Mabberley (2008) | Guttiferae. | ICBN |
| Endolepis | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Endolimax | Mastigamoebida | Patterson et al. (2000); Cavalier-Smith et al. (2004) | . | ICZN |
| Endomycola | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Endonema | Myrtales | Mabberley (2008) | Crypteroniaceae. | ICBN |
| Endopachys | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Endopappus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Endopleura | Malpighiales | Mabberley (2008) | Humiriaceae. | ICBN |
| Endopsammia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Endoralium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Endorete | Hexactinosida | Reiswig & Wheeler (2002) | . | ICZN |
| Endoreticulatus | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Endosamara | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Endosiphonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Endosira | Rhodymeniales | Schneider & Wynne (2007); Wynne & Schneider (2010) | Later synonym of Gloiocladia. | ICBN |
| Endospermum | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Endosphaera | Endogenida | Lynn (2008) | . | ICZN |
| Endosphaerium | Pythiales | Dick (2001); Kirk et al. (2008) | Pythiales. | ICBN |
| Endostelium | Protosteliales | Olive et al. (1984) | . | ICBN |
| Endostemon | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Endotrichellopsis | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Endotrypanum | Trypanosomatida | Moreira et al. (2004) | . | ICZN |
| Endozoicomonas | Oceanospirillales | Kurahashi & Yokota (2007) | . | ICNB |
| Endressia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Enelittosiphonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Enemion | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Enerthecoma | Rhynchodida | Lynn (2008) | . | ICZN |
| Enerthenema | Stemonitales | Yamamoto (1998) | . | ICBN |
| Engelhardtia | Fagales | Mabberley (2008) | Juglandaceae. | ICBN |
| Engelmannia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Engelmanniella | Stichotrichida | Lynn (2008) | . | ICZN |
| Engleria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Englerina | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Englerocharis | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Englerodendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Englerophytum | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Engomegoma | Santalales | Mabberley (2008) | Olacaceae. | ICBN |
| Engystomops | Anura | Vitt & Caldwell (2009) | Leiuperidae. | ICZN |
| Enhalus | Alismatales | Mabberley (2008) | Hydrocharitaceae. | ICBN |
| Enhydra | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Enhydrina | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Enhydris | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Enhydrobacter | Pseudomonadales | Garrity et al. (2005) | . | ICNB |
| Enhygromyxa | Myxococcales | Iizuka et al. (2003) | . | ICNB |
| Enicognathus | Psittaciformes | Clements (2007) | . | ICZN |
| Enicosanthum | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Enicostema | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Enicurus | Passeriformes | Clements (2007) | . | ICZN |
| Enigma | | Schneider & Wynne (2007) | . | ICBN |
| Enigmella | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Enkianthus | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Enkleia | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Enneagonum | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Ennealophus | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Enneameron | Nassulida | Lynn (2008) | . | ICZN |
| Enneapogon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Enodes | Passeriformes | Clements (2007) | . | ICZN |
| Enoploplastron | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Enriquebeltrania | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Ensatina | Caudata | Vitt & Caldwell (2009) | Plethodontidae. | ICZN |
| Ensete | Zingiberales | Mabberley (2008) | Musaceae. | ICBN |
| Ensiculifera | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Ensifer | Rhizobiales | Garrity et al. (2005) | . | ICNB |
| Ensifera | Apodiformes | Clements (2007) | . | ICZN |
| Entacmaea | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Entada | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Entamoeba | Pelobiontida | Patterson et al. (2000); Cavalier-Smith et al. (2004) | Entamoebidae. | ICZN |
| Entandrophragma | Sapindales | Mabberley (2008) | Meliaceae. | ICBN |
| Entechinus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Entelea | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Enteractinococcus | Micrococcales | Cao et al. (2012) | . | ICNB |
| Enteridium | Liceales | Yamamoto (1998); Lado (2001) | Later synonym of Reticularia. | ICBN |
| Enterobacter | Enterobacteriales | Garrity et al. (2005) | . | ICNB |
| Enterobryus | Ichthyophonida | Cafaro (2005); Kirk et al. (2008) | Eccrinales in mycology. | ICZN |
| Enterococcus | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Enterocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Enterocytozoon | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Enterolobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Enteromonas | Diplomonadida | Brugerolle & Lee (2000) | . | ICZN |
| Enteromyces | Ichthyophonida | Cafaro (2005); Kirk et al. (2008) | Eccrinales in mycology. | ICZN |
| Enteromyxum | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Enterophrya | Vestibuliferida | Lynn (2008) | . | ICZN |
| Enteroplea | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Enteropogon | Ichthyophonida | Cafaro (2005); Kirk et al. (2008) | Eccrinales in mycology. | ICZN |
| Enteropogon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Enterorhabdus | Coriobacteriales | Clavel et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Enterosora | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Enterovibrio | Vibrionales | Garrity et al. (2005) | . | ICNB |
| Entodesmis | | Kristiansen & Preisig (2001) | Domain Eucarya - Kingdom Straminipila - Phylum Ochrophyta. | ICBN |
| Entodinium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Entodiscoides | Philasterida | Lynn (2008) | . | ICZN |
| Entodiscus | Philasterida | Lynn (2008) | . | ICZN |
| Entodon | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Entodontella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Entodontopsis | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Entolasia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Entolingulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Entomodestes | Passeriformes | Clements (2007) | . | ICZN |
| Entomophobia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Entomoplasma | Entomoplasmatales | Garrity et al. (2005) | . | ICNB |
| Entomorphinoides | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Entomyzon | Passeriformes | Clements (2007) | . | ICZN |
| Entophysalis | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Entoplocamia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Entopolymorphina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Entorhipidium | Philasterida | Lynn (2008) | . | ICZN |
| Entosigmomorphina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Entosiphon | Heteronematales | Leedale (1967); Larsen & Patterson (1991); Leedale (2000) | Later homonym under ICBN. Synonymous to Entosiphonomonas. | ICBN |
| Entosiphonomonas | Heteronematales | Leedale (1967); Larsen & Patterson (1991); Leedale (2000) | . | ICBN |
| Entosphenus | Petromyzontiformes | Nelson (2006) | . | ICZN |
| Entosthodon | Funariales | Goffinet et al. (2009) | . | ICBN |
| Entransia | Klebsormidiales | Mikhailyuk et al. (2008) | . | ICBN |
| Entzia | Trochamminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Trochamminidae. | ICZN |
| Entziella | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Enuliophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Enulius | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Enyalioides | Squamata | Vitt & Caldwell (2009) | Iguanidae. | ICZN |
| Enyalius | Squamata | Vitt & Caldwell (2009) | Iguanidae. | ICZN |
| Enydra | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eobruchia | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Eocalypogeia | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Eocercomonas | Cercomonadida | Karpov et al. (2006); Howe et al. (2009) | . | ICZN |
| Eocollis | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Eodinium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Eoeponidella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Asterigerinatidae. | ICZN |
| Eoglaucomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eohypsibius | Parachela | Kinchin (1994) | . | ICZN |
| Eoisotachis | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Eolagurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eoleucodon | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eolophus | Psittaciformes | Clements (2007) | . | ICZN |
| Eomecon | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Eometopus | Armophorida | Lynn (2008) | . | ICZN |
| Eonemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Eonycteris | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eoperipatus | Euonychophora | Peck (1975) | Peripatidae. | ICZN |
| Eophona | Passeriformes | Clements (2007) | . | ICZN |
| Eopsaltria | Passeriformes | Clements (2007) | . | ICZN |
| Eos | Psittaciformes | Clements (2007) | . | ICZN |
| Eosanthe | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Eospalax | Rodentia | Musser & Carleton (2005) | . | ICZN |
| Eosphagnum | Sphagnales | Shaw et al. (2010) | Now checking. | ICBN |
| Eosphora | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Eothenomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eothinia | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Eotrichocolea | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Eousia | Heteronemertea | Gibson (1995) | . | ICZN |
| Eozapus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Epacris | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Epaltes | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Epalxella | Odontostomatida | Lynn (2008) | . | ICZN |
| Eparmatostigma | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epenardia | Tetrahymenida | Lynn (2008) | . | ICZN |
| Eperetmus | Limnomedusae | Bouillon et al. (2006) | . | ICZN |
| Eperua | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eperythrozoon | Mycoplasmatales | Garrity et al. (2005) | . | ICNB |
| Ephalophis | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Ephedra | Ephedrales | Mabberley (2008); Christenhusz et al. (2011) | . | ICBN |
| Ephedranthus | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Ephelota | Exogenida | Lynn (2008) | . | ICZN |
| Ephemeropsis | Hookeriales | Goffinet et al. (2009) | . | ICBN |
| Ephemerum | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Ephippiandra | Laurales | Mabberley (2008) | Monimiaceae. | ICBN |
| Ephippianthus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Ephippiorhynchus | Ciconiiformes | Clements (2007) | . | ICZN |
| Ephydatia | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Epiactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Epiblastus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epiblema | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epicancella | Tintinnida | Lynn (2008) | . | ICZN |
| Epicarchesium | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Epicavus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Epicharocotyle | Thigmotrichida | Lynn (2008) | . | ICZN |
| Epiclastopelma | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Epiclintes | Urostylida | Lynn (2008) | . | ICZN |
| Epicranella | Tintinnida | Lynn (2008) | . | ICZN |
| Epicrates | Squamata | Vitt & Caldwell (2009) | Serpentes. Boidae. | ICZN |
| Epicrionops | Gymnophiona | Vitt & Caldwell (2009) | Rhinatrematidae. | ICZN |
| Epicycas | Cycadales | Mabberley (2008); Christenhusz et al. (2011) | Later synonym of Cycas. | ICBN |
| Epicystis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Epicystis | Ochromonadales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chrysosphaeraceae (uniflagellate). | ICBN |
| Epidalea | Anura | Vitt & Caldwell (2009) | Bufonidae. | ICZN |
| Epidendrum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epidinium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Epidryos | Poales | Mabberley (2008) | Rapateaceae. | ICBN |
| Epifagus | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Epifolliculina | Heterotrichida | Lynn (2008) | . | ICZN |
| Epigaea | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Epigeneium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epigloeosphaera | Synechococcales | Hoffmann et al. (2005) | . | ICBN |
| Epiglossum | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Epigonichthys | Amphioxiformes | Nelson (2006) | . | ICZN |
| Epigynum | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Epilasia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Epilithia | | Greuter et al. (1993) | Domain Bacteria - Phylum Cyanobacteria. | ICBN |
| Epilithonimonas | Flavobacteriales | O'Sullivan et al. (2006) | . | ICNB |
| Epilobium | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Epimachus | Passeriformes | Clements (2007) | . | ICZN |
| Epimecophrya | | Lynn (2008) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Ciliophora. | ICZN |
| Epimedium | Ranunculales | Mabberley (2008) | Berberidaceae. | ICBN |
| Epipactis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epiparactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Epipedobates | Anura | Vitt & Caldwell (2009) | Dendrobatidae. | ICZN |
| Epiperipatus | Euonychophora | Peck (1975) | Peripatidae. | ICZN |
| Epiphanes | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Epiphaxum | Helioporacea | Bayer (1981) | . | ICZN |
| Epiphellia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Epiphloea | Cryptonemiales | Silva (2002); Schneider & Wynne (2007) | . | ICBN |
| Epiphyllum | Pleurostomatida | Lynn (2008) | Junior homonym. | ICZN |
| Epiphyllum | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Epiplastron | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Epiplocylis | Tintinnida | Lynn (2008) | . | ICZN |
| Epiplocyloides | Tintinnida | Lynn (2008) | . | ICZN |
| Epipogium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epipolasis | Halichondrida | Erpenbeck & Van Soest (2002) | . | ICZN |
| Epipremnum | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Epiprinus | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Epipterygium | Bryales | Goffinet et al. (2009) | . | ICBN |
| Epipyxis | Ochromonadales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Dinobryaceae (biflagellate). | ICBN |
| Epirhabdonella | Tintinnida | Lynn (2008) | . | ICZN |
| Epirixanthes | Fabales | Mabberley (2008) | Polygalaceae. | ICBN |
| Epischoenus | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Episcia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Episeptum | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Episoriculus | Soricomorpha | Hutterer (2005) | . | ICZN |
| Epispathidium | Haptorida | Lynn (2008) | . | ICZN |
| Episporium | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Epistemma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Epistephium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Epistomaroides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Alfredinidae. | ICZN |
| Epistominella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Pseudoparrellidae. | ICZN |
| Epistylis | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Epithelantha | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Epithema | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Epitholiolus | Haptorida | Lynn (2008) | . | ICZN |
| Epitriche | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Epixerus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Epixiphium | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Epizoanthus | Zoanthidea | Sinniger et al. (2005) | . | ICZN |
| Epomophorus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Epomops | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eponidella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Epistomariidae. | ICZN |
| Eponides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Eponididae. | ICZN |
| Eptatretus | Myxiniformes | Nelson (2006) | . | ICZN |
| Eptesicus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Epthianura | Passeriformes | Clements (2007) | . | ICZN |
| Epulo | Corallinales | Schneider & Wynne (2007) | . | ICBN |
| Epymenia | Rhodymeniales | Schneider & Wynne (2007) | Later synonym of Rhodymenia. | ICBN |
| Equisetum | Equisetales | Christenhusz et al. (2011) | . | ICBN |
| Equus | Perissodactyla | McKenna & Bell (1997) | . | ICZN |
| Eragrostiella | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eragrostis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eranthemum | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Eranthis | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Erastophrya | Endogenida | Lynn (2008) | . | ICZN |
| Eratidus | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Lituolidae. | ICZN |
| Erato | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erblichia | Malpighiales | Mabberley (2008) | Passifloraceae. | ICBN |
| Ercegovicia | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Ercilla | Caryophyllales | Mabberley (2008) | Phytolaccaceae. | ICBN |
| Erechtites | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eremaea | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Eremalauda | Passeriformes | Clements (2007) | . | ICZN |
| Eremalche | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Eremanthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eremias | Squamata | Vitt & Caldwell (2009) | Lacertidae. | ICZN |
| Eremiascincus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eremiornis | Passeriformes | Clements (2007) | . | ICZN |
| Eremitalpa | Afrosoricida | McKenna & Bell (1997); Stanhope et al. (1998) | Chrysochloridea. | ICZN |
| Eremitis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eremobiotus | Parachela | Kinchin (1994) | . | ICZN |
| Eremobium | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eremobius | Passeriformes | Clements (2007) | . | ICZN |
| Eremoblastus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eremocaulon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eremocharis | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Eremochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eremococcus | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Eremocrinum | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Eremodaucus | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Eremodipus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eremodraba | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eremogeton | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Eremogone | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Eremolaena | Malvales | Mabberley (2008) | Sarcolaenaceae. | ICBN |
| Eremolimon | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Eremomastax | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Eremomela | Passeriformes | Clements (2007) | . | ICZN |
| Eremonotus | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Eremophea | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Eremophila | Passeriformes | Clements (2007) | . | ICZN |
| Eremophila | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Eremophyton | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eremoplastron | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Eremopoa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eremopterix | Passeriformes | Clements (2007) | . | ICZN |
| Eremopyrum | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eremosis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eremosparton | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eremospatha | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Eremosphaera | Chlorellales | Darienko et al. (2010) | As Oocystis-clade. | ICBN |
| Eremostachys | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Eremosyne | Escalloniales | Mabberley (2008) | Escalloniaceae. | ICBN |
| Eremothamnus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eremothera | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Eremurus | Asparagales | Mabberley (2008) | Asphodelaceae. | ICBN |
| Erenna | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Erepsia | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Erethizon | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eretmochelys | Testudinata | Vitt & Caldwell (2009) | Cheloniidae. | ICZN |
| Ergaticus | Passeriformes | Clements (2007) | . | ICZN |
| Ergobibamus | | Park et al. (2010) | Domain Eucarya - Phylum Metamonada - Subphylum Trichozoa (Fornicata). | ICZN |
| Ergocarpon | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Eria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eriachaenium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eriachne | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eriandra | Fabales | Mabberley (2008) | Polygalaceae. | ICBN |
| Erianthecium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Erianthemum | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Eriastrum | Ericales | Mabberley (2008) | Polemoniaceae. | ICBN |
| Eriaxis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Erica | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Ericabatrachus | Anura | Vitt & Caldwell (2009) | Pyxicephalidae. | ICZN |
| Ericameria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ericentrodea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erichsenia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Ericiocyathus | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Ericiolus | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | incertae sedis. | ICBN |
| Eridacnis | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Eridiphas | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Erigenia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Erigeron | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erignatha | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Erignathus | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Erimophrya | Sporadotrichida | Lynn (2008) | . | ICZN |
| Erinacea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Erinaceus | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Erinna | Asparagales | Mabberley (2008) | Alliaceae. | ICBN |
| Erinocarpus | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Erinus | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Eriobotrya | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Eriocarpum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eriocaulon | Poales | Mabberley (2008) | Eriocaulaceae. | ICBN |
| Eriocephalus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eriochilus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eriochlamys | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eriochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eriochona | Cryptogemmida | Lynn (2008) | . | ICZN |
| Eriochrysis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eriocnema | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Eriocnemis | Apodiformes | Clements (2007) | . | ICZN |
| Eriocoelum | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Eriodes | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eriodictyon | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Eriodon | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eriogonum | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Eriogynia | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Eriolaena | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Eriolarynx | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Eriolobus | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Erionema | Physarales | Yamamoto (1998); Poulain et al. (2011) | Probably a later synonym of Fuligo (Yamamoto, 1998), but Poulain et al. (2011) still accepted the generic status of Erionema. | ICBN |
| Erioneuron | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eriope | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Eriophorum | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Eriophyllum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eriophyton | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Eriopsis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eriosema | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eriosemopsis | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Eriospermum | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Eriostemon | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Eriostylos | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Eriosyce | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Eriosynaphe | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Eriotheca | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Eriothymus | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Eriotrix | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erisma | Myrtales | Mabberley (2008) | Vochysiaceae. | ICBN |
| Erismadelphus | Myrtales | Mabberley (2008) | Vochysiaceae. | ICBN |
| Erismanthus | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Eristicophis | Squamata | Mattison (2007); Vitt & Caldwell (2009) | Serpentes. Viperidae. Not "Eristocophis". | ICZN |
| Erithacus | Passeriformes | Clements (2007) | . | ICZN |
| Erithalis | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Eritrichium | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Erlangea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ernestia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Erniella | | Lynn (2008) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Ciliophora - Class Spirotrichea - Subclass Stichotrichia. | ICZN |
| Ernodea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Erodiophyllum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erodium | Geraniales | Mabberley (2008) | Geraniaceae. | ICBN |
| Eropeplus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Erophaca | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Erophylla | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eroticoscincus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Erpeton | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Erpodium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Errazurizia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Errina | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Errinopora | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Errinopsis | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eruca | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Erucaria | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Erucastrum | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Erwinia | Enterobacteriales | Garrity et al. (2005) | . | ICNB |
| Erycibe | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Erycina | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Erylus | Astrophorida | Uriz (2002) | . | ICZN |
| Erymnochelys | Testudinata | Vitt & Caldwell (2009) | Podocnemidae. | ICZN |
| Erymophyllum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eryngium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Erysimum | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Erysipelothrix | Erysipelotrichales | Garrity et al. (2005); Ludwig et al. (2009) | . | ICNB |
| Erythrastrea | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Erythrina | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Erythrobacter | Sphingomonadales | Garrity et al. (2005) | . | ICNB |
| Erythrocebus | Primates | McKenna & Bell (1997) | . | ICZN |
| Erythrocephalum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Erythrocercus | Passeriformes | Clements (2007) | . | ICZN |
| Erythrochiton | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Erythrocladia | Erythropeltidales | Schneider & Wynne (2007) | . | ICBN |
| Erythroclonium | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Erythrococca | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Erythrocolon | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Erythrocystis | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Erythrodermis | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Erythrodes | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Erythrodontium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Erythroglossum | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Erythrogonys | Charadriiformes | Clements (2007) | . | ICZN |
| Erythrolamprus | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Erythrolobus | Porphyridiales | Schneider & Wynne (2007); Wynne & Schneider (2010) | . | ICBN |
| Erythromicrobium | Sphingomonadales | Garrity et al. (2005) | . | ICNB |
| Erythromonas | Sphingomonadales | Garrity et al. (2005) | . | ICNB |
| Erythronaema | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Erythronium | Liliales | Mabberley (2008) | Liliaceae. | ICBN |
| Erythropalum | Santalales | Mabberley (2008) | Erythropalaceae. | ICBN |
| Erythrophleum | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Erythrophyllastrum | Pottiales | Werner et al. (2004) | . | ICBN |
| Erythrophyllopsis | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Erythrophyllum | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Erythrophysa | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Erythropodium | Alcyonacea | Bayer (1981) | Anthothelidae. | ICZN |
| Erythropsidinium | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Erythrorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Erythroselinum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Erythrospermum | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Erythrostachys | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Erythrostemon | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Erythrotrichia | Erythropeltidales | Schneider & Wynne (2007) | . | ICBN |
| Erythrotriorchis | Falconiformes | Clements (2007) | . | ICZN |
| Erythroxylum | Malpighiales | Mabberley (2008) | Erythroxylaceae. | ICBN |
| Erythrura | Passeriformes | Clements (2007) | . | ICZN |
| Erythrymenia | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Eryx | Squamata | Vitt & Caldwell (2009) | Serpentes. Boidae. | ICZN |
| Escallonia | Escalloniales | Mabberley (2008) | Escalloniaceae. | ICBN |
| Eschaneustyla | Urostylida | Lynn (2008) | . | ICZN |
| Escherichia | Enterobacteriales | Garrity et al. (2005) | . | ICNB |
| Eschrichtius | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Eschsholzia | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Eschweilera | Ericales | Mabberley (2008) | Lecythidaceae. | ICBN |
| Escobedia | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Escontria | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Esenbeckia | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Esmeralda | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Esoptrodinium | | Pavel (1997); Calado et al. (2006) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Dinozoa - Class Dinophyceae. Now checking. | ICBN |
| Esosyrinx | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Espadaea | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Espejoa | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Espejoia | Tetrahymenida | Lynn (2008) | . | ICZN |
| Espeletia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Esperiopsis | Poecilosclerida | Van Soest & Hajdu (2002) | . | ICZN |
| Espostoa | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Espostoopsis | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Esterhazya | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Esterhuysenia | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Estrilda | Passeriformes | Clements (2007) | . | ICZN |
| Etaballia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Etericius | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Ethanoligenens | Clostridiales | Xing et al. (2006) | . | ICNB |
| Etheridgeum | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Ethulia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Etlingera | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Etmopterus | Squaliformes | Nelson (2006) | . | ICZN |
| Etoschophrya | Platyophryida | Lynn (2008); Foissner et al. (2011) | . | ICZN |
| Etoschothrix | Sporadotrichida | Lynn (2008) | . | ICZN |
| Euadenia | Brassicales | Mabberley (2008) | Capparaceae. | ICBN |
| Euastrum | Desmidiales | Gontcharov (2008) | . | ICBN |
| Eubacterium | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Eubalaena | Cetacea | Mead & Brownell, Jr. (2005) | . | ICZN |
| Eublepharis | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Euborlasia | Heteronemertea | Gibson (1995) | . | ICZN |
| Eubotrys | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Eubrachion | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Eubucco | Piciformes | Clements (2007) | . | ICZN |
| Eucalyptopsis | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Eucalyptus | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Eucamptocerca | Synhymeniida | Lynn (2008) | Nomen dubium. | ICZN |
| Eucamptodon | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Eucamptodontopsis | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Eucapsis | Synechococcales | Hoffmann et al. (2005) | . | ICBN |
| Eucarpha | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Eucecryphalus | Nassellaria | Anderson et al. (2000) | . | ICZN |
| Eucephalus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Euceraea | Malpighiales | Mabberley (2008) | Salicaceae. | ICBN |
| Euchaetis | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Eucharis | Asparagales | Mabberley (2008) | Amaryllidaceae. | ICBN |
| Eucheilota | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Euchelipluma | Poecilosclerida | Hajdu & Lerner (2002) | . | ICZN |
| Eucheuma | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Euchile | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Euchilopsis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Euchiton | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Euchitonia | Spumellaria | Anderson et al. (2000) | . | ICZN |
| Euchlanis | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Euchordodes | Gordioidea | Schmidt-Rhaesa (2002); Poinar Jr. (2008) | . | ICZN |
| Euchoreutes | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Euchorium | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Euchresta | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Eucladium | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Euclasta | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Euclavarctus | Arthrotardigrada | Kinchin (1994) | . | ICZN |
| Euclavella | Aplousobranchia | Kott (1998) | Pycnoclavellidae. | ICZN |
| Euclea | Ericales | Mabberley (2008) | Ebenaceae. | ICBN |
| Euclidium | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Euclinia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Eucnide | Cornales | Mabberley (2008) | Loasaceae. | ICBN |
| Eucodonia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Eucodonium | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eucoelium | Aplousobranchia | Kott (1998) | Polycitoridae. | ICZN |
| Eucometis | Passeriformes | Clements (2007) | . | ICZN |
| Eucomis | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Eucommia | Garryales | Mabberley (2008) | Eucommiaceae. | ICBN |
| Eucomonympha | Trichonymphida | Cepicka et al. (2010) | . | ICZN |
| Eucorymbia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Eucrosia | Asparagales | Mabberley (2008) | Amaryllidaceae. | ICBN |
| Eucrossorhinus | Orectolobiformes | Nelson (2006) | . | ICZN |
| Eucryphia | Oxalidales | Mabberley (2008) | Cunoniaceae. | ICBN |
| Eucrypta | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Eucuspidella | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eucyrtidium | Nassellaria | Anderson et al. (2000) | . | ICZN |
| Eudema | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eudendrium | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Euderma | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eudiplodinium | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Eudiscopus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eudistoma | Aplousobranchia | Monniot & Monniot (1972); Monniot (2001) | Polycitoridae. | ICZN |
| Eudocimus | Ciconiiformes | Clements (2007) | . | ICZN |
| Eudontomyzon | Petromyzontiformes | Nelson (2006) | . | ICZN |
| Eudoraea | Flavobacteriales | Alain et al. (2008) | . | ICNB |
| Eudorcas | Artiodactyla | Grubb (2005) | . | ICZN |
| Eudoxia | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Eudoxoides | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Eudrilophrya | Astomatida | Lynn (2008) | . | ICZN |
| Eudromia | Tinamiformes | Clements (2007) | . | ICZN |
| Euduboscquella | Syndinida | Coats et al. (2012) | . | ICZN |
| Eudynamys | Cuculiformes | Clements (2007) | . | ICZN |
| Eudyptes | Sphenisciformes | Clements (2007) | . | ICZN |
| Eudyptula | Sphenisciformes | Clements (2007) | . | ICZN |
| Eufolliculina | Heterotrichida | Lynn (2008) | . | ICZN |
| Eugeissona | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Eugenes | Apodiformes | Clements (2007) | . | ICZN |
| Eugenia | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Eugerygone | Passeriformes | Clements (2007) | . | ICZN |
| Euglandulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Euglena | Euglenales | Leedale (1967); Leedale (2000); Marin et al. (2003) | . | ICBN |
| Euglenamorpha | Euglenamorphales | Leedale (1967); Leedale (2000) | . | ICBN |
| Euglenaria | Euglenales | Linton et al. (2010) | . | ICBN |
| Euglenocapsa | Euglenales | Leedale (1967); Leedale (2000) | Probably synonymous to Euglena. | ICBN |
| Euglenopsis | Euglenales | Leedale (1967) | . | ICBN |
| Euglypha | Euglyphida | Meisterfeld (2000) | . | ICZN |
| Euglypha | Piperales | Mabberley (2008) | Aristolochiaceae. | ICBN |
| Euglyphidion | Euglyphida | Meisterfeld (2000) | . | ICZN |
| Eugongylus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eugorgia | Alcyonacea | Bayer (1981) | Gorgoniidae. | ICZN |
| Eugotoea | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eugralla | Passeriformes | Clements (2007) | . | ICZN |
| Eugymnanthea | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eugyra | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Molgulidae. | ICZN |
| Eugyrioides | Stolidobranchia | Monniot & Monniot (1972); Kott (1998); Monniot (2001) | Junior synonym of Eugyra. | ICZN |
| Euherdmania | Aplousobranchia | Monniot & Monniot (1972); Kott (1998) | Euherdmaniidae. | ICZN |
| Eukrohnia | Phragmophora | Bieri (1991); Kasatkina & Stolyarova (2006) | Eukrohniidae. | ICZN |
| Eulabeornis | Gruiformes | Clements (2007) | . | ICZN |
| Eulacestoma | Passeriformes | Clements (2007) | . | ICZN |
| Eulacophyllum | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eulalia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eulaliopsis | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eulampis | Apodiformes | Clements (2007) | . | ICZN |
| Eulamprus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eulemur | Primates | McKenna & Bell (1997) | . | ICZN |
| Euleptes | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Euleria | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Eulidia | Apodiformes | Clements (2007) | . | ICZN |
| Eulobus | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Eulophia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eulophiella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Euloxostomum | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Siphogenerinoididae. | ICZN |
| Eulychnia | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Eumeces | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eumecia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eumecynostomum | Acoela | Faubel & Noreña (2001) | . | ICZN |
| Eumedusa | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eumetopias | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Eumomota | Coraciiformes | Clements (2007) | . | ICZN |
| Eumops | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Eumorphia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eumyias | Passeriformes | Clements (2007) | . | ICZN |
| Eumyurium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eunapius | Haplosclerida | Manconi & Pronzato (2002) | . | ICZN |
| Eunectes | Squamata | Vitt & Caldwell (2009) | Serpentes. Boidae. | ICZN |
| Euneomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Euneornis | Passeriformes | Clements (2007) | . | ICZN |
| Eunicea | Alcyonacea | Bayer (1981) | Plexauridae. | ICZN |
| Eunicella | Alcyonacea | Bayer (1981) | Gorgoniidae. | ICZN |
| Eunomia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eunymphicus | Psittaciformes | Clements (2007) | . | ICZN |
| Euodia | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Euodice | Passeriformes | Clements (2007) | . | ICZN |
| Euonymopsis | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Euonymus | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Euoticus | Primates | McKenna & Bell (1997) | . | ICZN |
| Euparkerella | Anura | Vitt & Caldwell (2009) | Brachycephalidae. | ICZN |
| Eupatoriastrum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eupatorina | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eupatoriopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eupatorium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eupemphix | Anura | Vitt & Caldwell (2009) | Leiuperidae. | ICZN |
| Euperipatoides | Euonychophora | Reid (1996) | Peripatopsidae. | ICZN |
| Eupetaurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Eupetes | Passeriformes | Clements (2007) | . | ICZN |
| Euphagus | Passeriformes | Clements (2007) | . | ICZN |
| Euphellia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Eupherusa | Apodiformes | Clements (2007) | . | ICZN |
| Euphlyctis | Anura | Vitt & Caldwell (2009) | Dicroglossidae. | ICZN |
| Euphonia | Passeriformes | Clements (2007) | . | ICZN |
| Euphorbia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Euphorianthus | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Euphractus | Xenarthra | McKenna & Bell (1997) | . | ICZN |
| Euphrasia | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Euphronia | Malpighiales | Mabberley (2008) | Euphroniaceae. | ICBN |
| Euphrosyne | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Euphyllia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Euphysa | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Euphysetta | Phaeogromida | Takahashi & Anderson (2000) | . | ICZN |
| Euphysilla | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Euphysomma | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Euphysora | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eupilema | Rhizostomeae | Kramp (1961) | . | ICZN |
| Euplaesiobystra | Schizopyrenida | Park et al. (2009) | . | ICZN |
| Euplassa | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Euplectella | Lyssacinosida | Tabachnick (2002) | . | ICZN |
| Euplectes | Passeriformes | Clements (2007) | . | ICZN |
| Eupleres | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Euplexaura | Alcyonacea | Bayer (1981) | Plexauridae. | ICZN |
| Euploia | | Lynn (2008) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Ciliophora. Nomen dubium. | ICZN |
| Euplokamis | Cydippida | Harbison & Madin (1982) | . | ICZN |
| Euplotaspis | Euplotida | Lynn (2008) | . | ICZN |
| Euplotes | Euplotida | Lynn (2008) | . | ICZN |
| Euplotespora | Microsporida | Fokin et al. (2008) | . | ICZN |
| Euplotidium | Euplotida | Lynn (2008) | . | ICZN |
| Euplotoides | Euplotida | Lynn (2008) | . | ICZN |
| Euplotopsis | Euplotida | Lynn (2008) | . | ICZN |
| Eupodium | Marattiales | Christenhusz et al. (2011) | . | ICBN |
| Eupodotis | Gruiformes | Clements (2007) | . | ICZN |
| Eupogodon | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Eupolymorphina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Eupomatia | Magnoliales | Mabberley (2008) | Eupomatiaceae. | ICBN |
| Euprepes | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Euproctus | Caudata | Vitt & Caldwell (2009) | Salamandridae. | ICZN |
| Euprotomicroides | Squaliformes | Nelson (2006) | . | ICZN |
| Euprotomicrus | Squaliformes | Nelson (2006) | . | ICZN |
| Eupsophus | Anura | Vitt & Caldwell (2009) | Cycloramphidae. | ICZN |
| Euptelea | Ranunculales | Mabberley (2008) | Eupteleaceae. | ICBN |
| Euptilocladia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Euptilota | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Euptilotis | Trogoniformes | Clements (2007) | . | ICZN |
| Euptychium | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Eureiandra | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Eurete | Hexactinosida | Reiswig & Wheeler (2002) | . | ICZN |
| Eurhamphaea | Lobata | Harbison & Madin (1982) | . | ICZN |
| Eurhynchiadelphus | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eurhynchiastrum | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eurhynchiella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eurhynchium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Eurocephalus | Passeriformes | Clements (2007) | . | ICZN |
| Eurohypnum | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Euroscaptor | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Euroschinus | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Eurostopodus | Caprimulgiformes | Clements (2007) | . | ICZN |
| Eurya | Ericales | Mabberley (2008) | Pentaphylacaceae. | ICBN |
| Euryale | Nymphaeales | Mabberley (2008) | Nymphaeaceae. | ICBN |
| Eurybia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eurycarpus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eurycea | Caudata | Vitt & Caldwell (2009) | Plethodontidae. | ICZN |
| Eurycentrum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Euryceros | Passeriformes | Clements (2007) | . | ICZN |
| Eurychasma | | Dick (2001); Kirk et al. (2008) | Domain Eucarya - Kingdom Straminipila - Phylum Oomycota. Eurychasmataceae. | ICBN |
| Eurychasmidium | | Dick (2001); Kirk et al. (2008) | Domain Eucarya - Kingdom Straminipila - Phylum Oomycota. Eurychasmataceae. | ICBN |
| Eurychasmopsis | Leptomitales | Dick (2001); Kirk et al. (2008) | Apodachlyellaceae. | ICBN |
| Eurychilum | Philasterida | Lynn (2008) | . | ICZN |
| Eurychona | Cryptogemmida | Lynn (2008) | . | ICZN |
| Eurychone | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eurychorda | Poales | Mabberley (2008) | Restionaceae. | ICBN |
| Eurycoma | Sapindales | Mabberley (2008) | Simaroubaceae. | ICBN |
| Eurycorymbus | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Eurydactylodes | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Eurylaimus | Passeriformes | Clements (2007) | . | ICZN |
| Eurylepis | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Eurynorhynchus | Charadriiformes | Clements (2007) | . | ICZN |
| Euryodendron | Ericales | Mabberley (2008) | Pentaphylacaceae. | ICBN |
| Euryomma | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Euryomyrtus | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Euryops | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eurypetalum | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Euryplegma | Aulocalycoida | Reiswig (2002) | . | ICZN |
| Eurypon | Poecilosclerida | Hooper (2002) | . | ICZN |
| Euryptila | Passeriformes | Clements (2007) | . | ICZN |
| Eurypyga | Gruiformes | Clements (2007) | . | ICZN |
| Eurysolen | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Euryspongia | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Eurystemon | Commelinales | Mabberley (2008) | Pontederiaceae. | ICBN |
| Eurystomatella | Pleuronematida | Miao et al. (2010) | . | ICZN |
| Eurystomus | Coraciiformes | Clements (2007) | . | ICZN |
| Eurystyles | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Eurytaenia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Euryzygomatomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Euscaphis | Crossosomatales | Mabberley (2008) | Staphyleaceae. | ICBN |
| Euscarthmus | Passeriformes | Clements (2007) | . | ICZN |
| Euschistospiza | Passeriformes | Clements (2007) | . | ICZN |
| Eusideroxylon | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Eusiphon | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Eusmilia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Eusphaerella | Ochromonadales | Kristiansen & Preisig (2001); Wujek & Thompson (2002); Cavalier-Smith & Chao (2006) | Later synonym of Uroglenopsis. | ICBN |
| Eusphyra | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Euspondylus | Squamata | Vitt & Caldwell (2009) | Gymnophthalmidae. | ICZN |
| Euspora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Eustachys | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Eustegia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Eustephia | Asparagales | Mabberley (2008) | Amaryllidaceae. | ICBN |
| Eustichia | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Eustigma | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Eustigmatos | Eustigmatales | Hibberd (1981): Hegewald et al. (2007) | . | ICBN |
| Eustoma | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Eustrephus | Asparagales | Davis et al. (2004); Mabberley (2008) | Phylogenetically included in the Asparagales. | ICBN |
| Eusynstyela | Stolidobranchia | Monniot & Monniot (1972); Monniot (2001) | Styelidae. | ICZN |
| Eutaxia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Euterpe | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Eutetras | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Euthamia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Euthemis | Malpighiales | Mabberley (2008) | Ochnaceae. | ICBN |
| Euthlypis | Passeriformes | Clements (2007) | . | ICZN |
| Euthora | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Euthystachys | Lamiales | Mabberley (2008) | Stilbaceae. | ICBN |
| Eutiara | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Eutima | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eutimalphes | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eutintinnus | Tintinnida | Lynn (2008) | . | ICZN |
| Eutonina | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Eutoxeres | Apodiformes | Clements (2007) | . | ICZN |
| Eutrema | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Eutreptia | Eutreptiales | Leedale (1967); Leedale (2000) | . | ICBN |
| Eutreptiella | Eutreptiales | Leedale (1967); Leedale (2000); Marin et al. (2003) | . | ICBN |
| Eutrichomyias | Passeriformes | Clements (2007) | . | ICZN |
| Eutriorchis | Falconiformes | Clements (2007) | . | ICZN |
| Eutrochium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Eutropis | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Euuvigerina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Uvigerinidae. | ICZN |
| Euxylophora | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Euzebya | Euzebyales | Kurahashi et al. (2010); Ludwig et al. (2012) | . | ICNB |
| Euzebyella | Flavobacteriales | Lucena et al. (2010) | . | ICNB |
| Euzetacanthus | Echinorhynchida | Amin (1985) | . | ICZN |
| Evacidium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Evandra | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Evansianthus | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Evansiolejeunea | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Evax | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Evelineus | Heteronemertea | Gibson (1995) | . | ICZN |
| Evemonia | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Everardia | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Everistia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Eversmannia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Evlachovaia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Evodianthus | Pandanales | Mabberley (2008) | Cyclanthaceae. | ICBN |
| Evolutononion | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nonionidae. | ICZN |
| Evolvocassidulina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cassidulinidae. | ICZN |
| Evolvulus | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Evotella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Ewartia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ewartiothamnus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ewingella | Enterobacteriales | Garrity et al. (2005) | . | ICNB |
| Exaculum | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Exacum | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Exalaria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Exallodontophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Exanthemachrysis | Pavlovales | Edvardsen et al. (2000); Jordan et al. (2004) | Pavlovaceae. | ICBN |
| Exarata | Lamiales | Mabberley (2008) | Schlegeliaceae. | ICBN |
| Exbucklandia | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Excellospora | Streptosporangiales | Garrity et al. (2005); Goodfellow & Trujillo (2012) | Later synonym of Actinomadura. | ICNB |
| Excentradenia | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Excentrochloris | Mischococcales | Ettl (1978) | . | ICBN |
| Excoecaria | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Exellia | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Exellodendron | Malpighiales | Mabberley (2008) | Chrysobalanaceae. | ICBN |
| Exerodonta | Anura | Vitt & Caldwell (2009) | Hylidae. | ICZN |
| Exhalimolobos | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Exiguobacterium | Bacillales | Garrity et al. (2005) | . | ICNB |
| Exiliboa | Squamata | Vitt & Caldwell (2009) | Serpentes. "Tropidophiidae". | ICZN |
| Exilicrusta | Corallinales | Schneider & Wynne (2007) | . | ICBN |
| Exilisciurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Exilispira | Spirochaetales | Imachi et al. (2008) | . | ICNB |
| Exoacantha | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Exocarpos | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Exocarya | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Exocelis | Acoela | Ehlers & Dörjes (1979) | Under confirmation. | ICZN |
| Exochogyne | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Exochorda | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Exoclavarctus | Arthrotardigrada | Kinchin (1994) | . | ICZN |
| Exocoelactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Exocolpoda | Colpodida | Lynn (2008) | . | ICZN |
| Exodeconus | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Exodictyon | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Exomiocarpon | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Exomis | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Exophyllum | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Exorhopala | Santalales | Mabberley (2008) | Balanophoraceae. | ICBN |
| Exormotheca | Marchantiales | Crandall-Stotler et al. (2009) | . | ICBN |
| Exoschizon | Archigregarinorida | Perkins et al. (2000) | . | ICZN |
| Exostema | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Exostoma | Aplousobranchia | Kott (1998) | Polycitoridae. | ICZN |
| Exostratum | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Exostyles | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Exothea | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Exotheca | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Exsculptina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ellipsolagenidae. | ICZN |
| Extremocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Exuviaella | Prorocentrales | McLachlan et al. (1997) | . | ICBN |
| Eysenhardtia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Ezo | Corallinales | Schneider & Wynne (2007) | . | ICBN |
| Ezosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| F | |
| Fabalesquereusia | Arcellinida | Snegovaya & Alekperov (2005) | Lesquereusiidae. | ICZN |
| Faberiopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fabespora | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Fabiana | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Fabibacter | Cytophagales | Lau et al. (2006); Ludwig et al. (2011) | . | ICNB |
| Fabienna | Laingiomedusae | Bouillon et al. (2006) | . | ICZN |
| Fabrea | Heterotrichida | Lynn (2008) | . | ICZN |
| Fabronia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Fabronidium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Fabulosus | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Facelis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Facheiroa | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Facklamia | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Fadenia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Fadogia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Fadogiella | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Faecalibacterium | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Faerlea | Acoela | Dörjes (1968); Faubel & Noreña (2001); Hooge & Tyler (2005) | . | ICZN |
| Fagaropsis | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Fagerlindia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Fagonia | Zygophyllales | Mabberley (2008) | Zygophyllaceae. | ICBN |
| Fagopyrum | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Fagraea | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Faguetia | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Fagus | Fagales | Mabberley (2008) | Fagaceae. | ICBN |
| Faidherbia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Faika | Laurales | Mabberley (2008) | Monimiaceae. | ICBN |
| Falcaria | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Falcataria | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Falcatifolium | Araucariales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Falcatoflabellum | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Falcicyclidium | Pleuronematida | Fan et al. (2011) | . | ICZN |
| Falcipennis | Galliformes | Clements (2007) | . | ICZN |
| Falcivibrio | Actinomycetales | Garrity et al. (2005); Hoyles & McCartney (2012) | Later synonym of Mobiluncus. | ICNB |
| Falco | Falconiformes | Clements (2007) | . | ICZN |
| Falcomonas | Pyrenomonadales | Clay et al. (1999); Novarino (2003) | . | ICBN |
| Falconeria | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Falconyctus | Clevelandellida | Lynn (2008) | . | ICZN |
| Falculea | Passeriformes | Clements (2007) | . | ICZN |
| Falcunculus | Passeriformes | Clements (2007) | . | ICZN |
| Falkia | Solanales | Mabberley (2008) | Convolvulaceae. | ICBN |
| Falklandiella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Fallaciella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Fallopia | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Fallugia | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Falsibacillus | Bacillales | Zhou et al. (2009) | . | ICNB |
| Falsistrellus | Chiroptera | Simmons (2005) | . | ICZN |
| Famintzinia | Protosteliales | Lado (2001); Lado et al. (2005) | Rejected earlier synonym of Ceratiomyxa. | ICBN |
| Fangia | Thiotrichales | Lau et al. (2007) | . | ICNB |
| Fangophilina | Spirophorida | Van Soest & Rützler (2002) | . | ICZN |
| Fanninia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Faradaya | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Faramea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Farancia | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Farfugium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fargesia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Farinocystis | Neogregarinorida | Perkins et al. (2000) | . | ICZN |
| Farlowia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Farmeria | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Faroa | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Farquharia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Farrago | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Farrea | Hexactinosida | Reiswig (2002) | . | ICZN |
| Farsetia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Fascaplysinopsis | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Fascicularia | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Fasciculonemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Fasciospongia | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Fastidiosipila | Clostridiales | Falsen et al. (2005) | . | ICNB |
| Fatoua | Rosales | Mabberley (2008) | Moraceae. | ICBN |
| Fatshedera | Apiales | Mabberley (2008) | xFatshedera. Fatsia x Hedera hybrids. Araliaceae. | ICBN |
| Fatsia | Apiales | Mabberley (2008) | Araliaceae. | ICBN |
| Faucaria | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Fauchea | Rhodymeniales | Schneider & Wynne (2007) | Later synonym of Gloiocladia. | ICBN |
| Faucheocolax | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Faucheopsis | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Faucherea | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Faucispora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Faujasia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Faujasiopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Faurea | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Fauriella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Favella | Tintinnida | Lynn (2008) | . | ICZN |
| Favia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Favites | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Favocassidulina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cassidulinidae. | ICZN |
| Favulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ellipsolagenidae. | ICZN |
| Faxonia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Feddea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fedia | Dipsacales | Mabberley (2008) | Valerianaceae. | ICBN |
| Feeria | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Fegimanra | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Feihyla | Anura | Vitt & Caldwell (2009) | Rhacophoridae. | ICZN |
| Fejervarya | Anura | Vitt & Caldwell (2009) | Dicroglossidae. | ICZN |
| Feldmannophycus | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Feldstonia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Felicia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Feliciadamia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Felipponea | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Felis | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Felovia | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Femogibbosus | Echinorhynchida | Amin (1985) | . | ICZN |
| Fenchelia | Thigmotrichida | Lynn (2008) | . | ICZN |
| Fendlera | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Fendlerella | Cornales | Mabberley (2008) | Hydrangeaceae. | ICBN |
| Fenestraja | Rajiformes | Nelson (2006) | . | ICZN |
| Fenestraria | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Fenestraspongia | Dictyoceratida | Cook & Bergquist (2002) | . | ICZN |
| Fenixia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ferdinandusa | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Feresa | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Feretia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Fergania | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Fergusonia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Ferminia | Passeriformes | Clements (2007) | . | ICZN |
| Fernaldia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Fernandezia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Fernandoa | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Fernandosiphonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Fernelia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Fernseea | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Ferocactus | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Feroculus | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Feroniella | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Ferosagitta | Aphragmophora | Bieri (1991) | Sagittidae. | ICZN |
| Ferraria | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Ferreyranthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ferreyrella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Ferribacterium | Rhodocyclales | Garrity et al. (2005) | . | ICNB |
| Ferrimicrobium | Acidimicrobiales | Johnson et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Ferrimonas | Alteromonadales | Garrity et al. (2005) | . | ICNB |
| Ferrithrix | Acidimicrobiales | Johnson et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Ferrocalamus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Ferroglobus | Archaeoglobales | Garrity et al. (2005) | . | ICNB |
| Ferroplasma | Picrophilales | Garrity et al. (2005) | . | ICNB |
| Ferruginibacter | Sphingobacteriales | Lim, J. H. et al. (2009) | . | ICNB |
| Ferula | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Ferulago | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Ferulopsis | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Fervidicella | Clostridiales | Ogg & Patel (2010) | . | ICNB |
| Fervidicoccus | Fervidicoccales | Perevalova et al. (2010) | . | ICNB |
| Fervidicola | Thermoanaerobacterales | Ogg & Patel (2009) | . | ICNB |
| Fervidobacterium | Thermotogales | Garrity et al. (2005) | . | ICNB |
| Fessisentis | Echinorhynchida | Amin (1985) | . | ICZN |
| Festuca | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Festulolium | Poales | Mabberley (2008) | xFestulolium. Festuca x Lolium hybrids. Gramineae. | ICBN |
| Feuerbornia | | Meisterfeld (2000); Cavalier-Smith & Chao (2003) | Domain Eucarya - Phylum Cercozoa. | ICZN |
| Fevillea | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Feylinia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Fezia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Fibigia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Fibraurea | Ranunculales | Mabberley (2008) | Menispermaceae. | ICBN |
| Fibrella | Cytophagales | Filippini et al. (2011) | . | ICNB |
| Fibrisoma | Cytophagales | Filippini et al. (2011) | . | ICNB |
| Fibrobacter | Fibrobacterales | Garrity et al. (2005) | . | ICNB |
| Fibrocapsa | Raphidomonadales | Heywood & Leedale (2000) | . | ICBN |
| Fibulia | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Ficalhoa | Ericales | Mabberley (2008) | Sladeniaceae. | ICBN |
| Ficaria | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Ficedula | Passeriformes | Clements (2007) | . | ICZN |
| Ficimia | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Ficinia | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Ficus | Rosales | Mabberley (2008) | Moraceae. | ICBN |
| Fiebrigiella | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Fieldia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Fieldingia | Hexactinosida | Reiswig (2002) | . | ICZN |
| Fifea | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Fijiella | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Reussellidae. | ICZN |
| Fijinonion | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nonionidae. | ICZN |
| Filago | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Filamoeba | Varipodida | Rogerson & Patterson (2000); Cavalier-Smith et al. (2004); Smirnov et al. (2008) | . | ICZN |
| Filarum | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Filellum | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Filetia | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Filibacter | Bacillales | Garrity et al. (2005) | . | ICNB |
| Filichona | Exogemmida | Lynn (2008) | . | ICZN |
| Filicium | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Filicollis | Polymorphida | Amin (1985) | . | ICZN |
| Filifactor | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Filimonas | Sphingobacteriales | Shiratori et al. (2009) | . | ICNB |
| Filinia | Flosculariaceae | Segers (2002); Segers (2007) | . | ICZN |
| Filipendula | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Filipodium | Archigregarinorida | Perkins et al. (2000); Rueckert & Leander (2009) | Selenidiidae. | ICZN |
| Filisoma | Echinorhynchida | Amin (1985) | . | ICZN |
| Fillaeopsis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Filobacillus | Bacillales | Garrity et al. (2005) | . | ICNB |
| Filodinium | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Filomicrobium | Rhizobiales | Garrity et al. (2005) | . | ICNB |
| Filoreta | Reticulosida | Bass et al. (2009) | . | ICZN |
| Filos | Pseudodendromonadales | Kim et al. (2009) | . | ICZN |
| Fimbribambusa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Fimbrifolium | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Fimbriimonas | Fimbriimonadales | Im et al. (2012) | . | ICNB |
| Fimbrios | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Fimbristylis | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Finegoldia | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Fingerhuthia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Finlaysonia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Finschia | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Firmiana | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Fischerella | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Fischerellopsis | Nostocales | Yamagishi (2007) | . | ICBN |
| Fischeria | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Fischerina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Fischerinidae. | ICZN |
| Fischerinella | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Fischerinidae. | ICZN |
| Fissicalyx | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Fissidens | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Fissistigma | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Fissurina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ellipsolagenidae. | ICZN |
| Fissuripolymorphina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Fissuroderes | Cyclorhagida | Neuhaus & Blasche (2006) | . | ICZN |
| Fitchia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fittingia | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Fittonia | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Fitzroya | Cupressales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Fitzwillia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Flabellaria | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Flabellariopsis | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Flabellidium | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Flabelliforma | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Flabellula | Leptomyxida | Rogerson & Patterson (2000); Smirnov et al. (2005) | . | ICZN |
| Flabellum | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Flaccisagitta | Aphragmophora | Bieri (1991) | Sagittidae. | ICZN |
| Flacourtia | Malpighiales | Mabberley (2008) | Salicaceae. | ICBN |
| Flagellaria | Poales | Mabberley (2008) | Flagellariaceae. | ICBN |
| Flagellimonas | Flavobacteriales | Bae et al. (2007) | . | ICNB |
| Flagellophora | Nemertodermatida | Sterrer (1998) | . | ICZN |
| Flagenium | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Flahaultia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Flamella | Varipodida | Rogerson & Patterson (2000); Cavalier-Smith et al. (2004); Kudryavtsev et al. (2009) | Related to Filamoeba; Hyalodiscidae?. | ICZN |
| Flaminga | Heteronemertea | Gibson (1995) | . | ICZN |
| Flammeovirga | Cytophagales | Garrity et al. (2005); Ludwig et al. (2011) | . | ICNB |
| Flatbergium | Sphagnales | Shaw et al. (2010) | Now checking. | ICBN |
| Flaveria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Flavihumibacter | Sphingobacteriales | Zhang et al. (2010) | . | ICNB |
| Flavimonas | Pseudomonadales | Garrity et al. (2005) | . | ICNB |
| Flaviramulus | Flavobacteriales | Einen & Øvreås (2006) | . | ICNB |
| Flavisolibacter | Sphingobacteriales | Yoon & Im (2007) | . | ICNB |
| Flavitalea | Sphingobacteriales | Wang et al. (2011) | . | ICNB |
| Flavivirga | Flavobacteriales | Yi et al. (2012) | . | ICNB |
| Flavobacterium | Flavobacteriales | Garrity et al. (2005) | . | ICNB |
| Flavonifractor | Clostridiales | Carlier et al. (2010) | . | ICNB |
| Flectichona | Cryptogemmida | Lynn (2008) | . | ICZN |
| Flectobacillus | Cytophagales | Garrity et al. (2005); Ludwig et al. (2011) | . | ICNB |
| Flectomonas | Glissomonadida | Howe et al. (2009) | . | ICZN |
| Flectonotus | Anura | Vitt & Caldwell (2009) | Amphignathodontidae. | ICZN |
| Fleischerobryum | Bartramiales | Goffinet et al. (2009) | . | ICBN |
| Fleischmannia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fleischmanniopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Flemingia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Fleurydora | Malpighiales | Mabberley (2008) | Ochnaceae. | ICBN |
| Flexanthera | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Flexibacter | Cytophagales | Garrity et al. (2005); Ludwig et al. (2011) | . | ICNB |
| Flexistipes | Geovibriales | Garrity et al. (2005) | . | ICNB |
| Flexithrix | Cytophagales | Garrity et al. (2005); Ludwig et al. (2011) | . | ICNB |
| Flexivirga | Micrococcales | Anzai et al. (2011); Ludwig et al. (2012) | Dermacoccaceae. | ICNB |
| Flickingeria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Flindersia | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Flindersiella | Propionibacteriales | Kaewkla & Franco (2011); Ludwig et al. (2012) | Nocardioidaceae. | ICNB |
| Flintia | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Spiroloculinidae. | ICZN |
| Flintiella | Porphyridiales | Schneider & Wynne (2007) | . | ICBN |
| Flintina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hauerinidae. | ICZN |
| Flintinoides | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hauerinidae. | ICZN |
| Floerkea | Brassicales | Mabberley (2008) | Limnanthaceae. | ICBN |
| Florarctus | Arthrotardigrada | Kinchin (1994) | . | ICZN |
| Florelliceps | Euonychophora | Tait & Norman (2001) | Peripatopsidae. | ICZN |
| Florenciella | Florenciellales | Edvardsen et al. (2007) | . | ICBN |
| Floresca | Semaeostomeae | Kramp (1961) | . | ICZN |
| Florestina | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Floribundaria | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Floridosentis | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Florisphaera | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | incertae sedis. | ICBN |
| Florisuga | Apodiformes | Clements (2007) | . | ICZN |
| Florschuetziella | Orthotrichales | Goffinet et al. (2009) | . | ICBN |
| Floscaldasia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Floscopa | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Floscularia | Flosculariaceae | Segers (2002); Segers (2007) | . | ICZN |
| Flosculinella | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Alveolinidae. | ICZN |
| Flosculosphaera | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | former Calyptrosphaeraceae. | ICBN |
| Flosmaris | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Flosmutisia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Flourensia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Flowersia | Bartramiales | Goffinet et al. (2009) | . | ICBN |
| Floydia | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Flueggea | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Fluvicola | Passeriformes | Clements (2007) | . | ICZN |
| Fluviicola | Flavobacteriales | O'Sullivan et al. (2005) | . | ICNB |
| Fluxiderma | Chaetonotida | Balsamo et al. (2009) | . | ICZN |
| Flyriella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Foaina | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Fockea | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Fodinibacter | Micrococcales | Wang et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Fodinibius | | Wang et al. (2012) | Domain Bacteria - Phylum Bacteroidetes - Class Cytophagia. | ICNB |
| Fodinicola | Frankiales | Carlsohn et al. (2008); Ludwig et al. (2012) | . | ICNB |
| Fodinicurvata | Rhodospirillales | Wang et al. (2009) | . | ICNB |
| Foeniculum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Foersteria | Leptothecata | Bouillon et al. (2006); Collins et al. (2006) | Junior homonym. Replaced by Earleria. | ICZN |
| Foetidia | Ericales | Mabberley (2008) | Lecythidaceae. | ICBN |
| Foettingeria | Apostomatida | Lynn (2008) | . | ICZN |
| Foissnerella | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Foissnerides | Haptorida | Lynn (2008) | . | ICZN |
| Fojia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Fokienia | Cupressales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Foleyola | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Folia | Appendicularia | Fenaux (1998) | . | ICZN |
| Folioceros | Anthocerotales | Renzaglia et al. (2009) | . | ICBN |
| Folliculina | Heterotrichida | Lynn (2008) | . | ICZN |
| Folliculinopsis | Heterotrichida | Lynn (2008) | nomen nudum. | ICZN |
| Fonsecaia | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Fontainea | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Fontanesia | Lamiales | Mabberley (2008) | Oleaceae. | ICBN |
| Fontbotia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cibicididae. | ICZN |
| Fontibacillus | Bacillales | Saha et al. (2010) | . | ICNB |
| Fontibacter | Cytophagales | Kämpfer et al. (2010); Ludwig et al. (2011) | . | ICNB |
| Fonticula | Fonticulida | Shalchian-Tabrizi et al. (2008); Brown et al. (2009) | . | ICZN |
| Fontinalis | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Forcepia | Poecilosclerida | Van Soest (2002) | . | ICZN |
| Forchhammeria | Brassicales | Mabberley (2008) | Resedaceae. | ICBN |
| Forcipella | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Fordia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Fordiophyton | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Fordonia | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Foreauella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Forestiera | Lamiales | Mabberley (2008) | Oleaceae. | ICBN |
| Formania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Formicarius | Passeriformes | Clements (2007) | . | ICZN |
| Formicivora | Passeriformes | Clements (2007) | . | ICZN |
| Formivibrio | Neisseriales | Garrity et al. (2005) | . | ICNB |
| Formosa | Flavobacteriales | Ivanova et al. (2004) | . | ICNB |
| Forpus | Psittaciformes | Clements (2007) | . | ICZN |
| Forskalia | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Forsskaolea | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Forsstroemia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Forstera | Asterales | Mabberley (2008) | Stylidiaceae. | ICBN |
| Forsteronia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Forsythia | Lamiales | Mabberley (2008) | Oleaceae. | ICBN |
| Fortiea | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Fortunearia | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Fortuynia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Fosbergia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Fossa | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Fossombronia | Fossombroniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Fosterella | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Fothergilla | Saxifragales | Mabberley (2008) | Hamamelidaceae. | ICBN |
| Foudia | Passeriformes | Clements (2007) | . | ICZN |
| Foulehaio | Passeriformes | Clements (2007) | . | ICZN |
| Fouquieria | Ericales | Mabberley (2008) | Fouquieriaceae. | ICBN |
| Foveolina | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Foveolocyathus | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Fragilidium | Gonyaulacales | Fensome et al. (1993) | . | ICBN |
| Fragilonemertes | Heteronemertea | Kajihara et al. (2008) | . | ICZN |
| Fragmocirrus | Stichotrichida | Lynn (2008) | . | ICZN |
| Frahmiella | Hypnales | Ignatov et al. (2010) | . | ICBN |
| Frailea | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Francesita | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Caucasinidae. | ICZN |
| Franciella | Hypnodendrales | Goffinet et al. (2009) | . | ICBN |
| Franciscodendron | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Francisella | Thiotrichales | Garrity et al. (2005) | . | ICNB |
| Francoa | Geraniales | Mabberley (2008) | Francoaceae. | ICBN |
| Francolinus | Galliformes | Clements (2007) | . | ICZN |
| Francuscia | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Frangula | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Frankenia | Caryophyllales | Mabberley (2008) | Frankeniaceae. | ICBN |
| Frankia | Frankiales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Franklandia | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Franklinia | Ericales | Mabberley (2008) | Theaceae. | ICBN |
| Frasera | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Fraseria | Passeriformes | Clements (2007) | . | ICZN |
| Fraseroscyphus | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Fratercula | Charadriiformes | Clements (2007) | . | ICZN |
| Frateuria | Xanthomonadales | Garrity et al. (2005) | . | ICNB |
| Fraunhofera | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Fraxinus | Lamiales | Mabberley (2008) | Oleaceae. | ICBN |
| Frederickena | Passeriformes | Clements (2007) | . | ICZN |
| Fredsmithia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Buliminoididae. | ICZN |
| Freesia | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Fregata | Pelecaniformes | Clements (2007) | . | ICZN |
| Fregetta | Procellariiformes | Clements (2007) | . | ICZN |
| Fremontodendron | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Fremya | Tribonematales | Ettl (1978); Silva (1979) | Later homonym. Replaced by "Sphagnoikos". | ICBN |
| Frenkelia | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Frenzelina | | Meisterfeld (2000); Cavalier-Smith & Chao (2003) | Domain Eucarya - Phylum Cercozoa. | ICZN |
| Freya | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Freycinetia | Pandanales | Mabberley (2008) | Pandanaceae. | ICBN |
| Freylinia | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Freziera | Ericales | Mabberley (2008) | Pentaphylacaceae. | ICBN |
| Friedmanniella | Propionibacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Friedrichia | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Friesodielsia | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Frigoribacterium | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Frikkiella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Frillagalma | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Fringilla | Passeriformes | Clements (2007) | . | ICZN |
| Frithia | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Fritillaria | Appendicularia | Fenaux (1998) | . | ICZN |
| Fritillaria | Liliales | Mabberley (2008) | Liliaceae. | ICBN |
| Fritzschia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Froelichia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Froelichiella | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Froesia | Malpighiales | Mabberley (2008) | Ochnaceae. | ICBN |
| Froesiochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Froesiodendron | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Frolovia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Frommia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Frondaria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Frondicola | Micrococcales | Zhang et al. (2007); Greene et al. (2009) | Later homonym. Replaced by Frondihabitans. | ICNB |
| Frondicularia | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nodosariidae. | ICZN |
| Frondihabitans | Micrococcales | Greene et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Frontonemertes | Eumonostilifera | Iwata (2006); Kajihara et al. (2008) | Closely related to Tetranemertes. | ICZN |
| Frontonia | Peniculida | Lynn (2008) | . | ICZN |
| Frontoniella | Peniculida | Lynn (2008) | Later synonym of Frontonia?. | ICZN |
| Froriepia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Frostius | Anura | Vitt & Caldwell (2009) | Bufonidae. | ICZN |
| Fructobacillus | Lactobacillales | Endo & Okada (2008) | . | ICNB |
| Frullania | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Frullanoides | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Fryeella | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Fryxellia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Fuchsia | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Fuchsiella | Halanaerobiales | Zhilina et al. (2012) | . | ICNB |
| Fuernrohria | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Fuerstia | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Fuertesia | Cornales | Mabberley (2008) | Loasaceae. | ICBN |
| Fuertesiella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Fuertesimalva | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Fuettererella | Peridiniales | Meier et al. (2002) | . | ICBN |
| Fuirena | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Fujiscon | Parachela | Kinchin (1994) | . | ICZN |
| Fukaurahydra | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Fulcaldea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Fulfordianthus | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Fulica | Gruiformes | Clements (2007) | . | ICZN |
| Fuligo | Physarales | Yamamoto (1998) | . | ICBN |
| Fulmarus | Procellariiformes | Clements (2007) | . | ICZN |
| Fulvibacter | Flavobacteriales | Khan et al. (2008) | . | ICNB |
| Fulvimarina | Rhizobiales | Cho & Giovannoni (2003) | . | ICNB |
| Fulvimonas | Xanthomonadales | Garrity et al. (2005) | . | ICNB |
| Fulvivirga | Cytophagales | Nedashkovskaya et al. (2007); Ludwig et al. (2011) | . | ICNB |
| Fumana | Malvales | Mabberley (2008) | Cistaceae. | ICBN |
| Fumaria | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Fumariola | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Fumarolamoeba | Schizopyrenida | De Jonckheere et al. (2011) | . | ICZN |
| Funambulus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Funaria | Funariales | Goffinet et al. (2009) | . | ICBN |
| Funariella | Funariales | Goffinet et al. (2009) | . | ICBN |
| Funastrum | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Fundenia | Prorodontida | Lynn (2008) | . | ICZN |
| Fundibacter | Oceanospirillales | Garrity et al. (2005) | . | ICNB |
| Fungia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Fungiacyathus | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Funginus | Alcyonacea | Alderslade (2000) | Xeniidae. | ICZN |
| Fungiphrya | Colpodida | Lynn (2008) | . | ICZN |
| Fungulus | Stolidobranchia | Monniot & Monniot (1972) | Molgulidae. | ICZN |
| Fungulus | Alcyonacea | Bayer (1981) | Xeniidae. | ICZN |
| Funiculina | Pennatulacea | Williams (1995) | . | ICZN |
| Funifera | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Funisciurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Funkiella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Funtumia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Furcellaria | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Furcifer | Squamata | Vitt & Caldwell (2009) | Chamaeleonidae. | ICZN |
| Furcraea | Asparagales | Mabberley (2008) | Asparagaceae. | ICBN |
| Furgaleus | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Furgasonia | Nassulida | Lynn (2008) | . | ICZN |
| Furina | Squamata | Vitt & Caldwell (2009) | Serpentes. Elapidae. | ICZN |
| Furipterus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Furnarius | Passeriformes | Clements (2007) | . | ICZN |
| Fursenkoina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Fursenkoinidae. | ICZN |
| Furtadoa | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Furugelmina | Eumonostilifera | Chernyshev (2005); Kajihara et al. (2008) | Amphiporidae. | ICZN |
| Fusaea | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Fusantrum | Acoela | Crezée (1975) | . | ICZN |
| Fuscheria | Haptorida | Lynn (2008) | . | ICZN |
| Fuscifolium | Bangiales | Sutherland et al. (2011) | . | ICBN |
| Fuscocephaloziopsis | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Fusibacter | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Fusiona | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Fusispermum | Malpighiales | Mabberley (2008) | Violaceae. | ICBN |
| Fusobacterium | Fusobacteriales | Garrity et al. (2005) | . | ICNB |
| Fusochloris | Microthamniales | Lewis & McCourt (2004) | Later synonym of Coleochlamys. | ICBN |
| G | |
| Gaarderia | Peridiniales | Carbonell-Moore (1994); Carbonell-Moore (2010) | Later homonym. Replaced by Gaarderiella. | ICBN |
| Gaarderiella | Peridiniales | Carbonell-Moore (1994); Carbonell-Moore (2010) | Replacement name for Gaarderia. | ICBN |
| Gackstroemia | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gadimyxa | Bivalvulida | Køie et al. (2007) | . | ICZN |
| Gaertnera | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gaetbulibacter | Flavobacteriales | Jung et al. (2005) | . | ICNB |
| Gaetbulicola | Rhodobacterales | Yoon et al. (2010); Yoon et al. (2012) | Later synonym of Marivita. | ICNB |
| Gaetbulimicrobium | Flavobacteriales | Yoon et al. (2006); Nedashkovskaya et al. (2006) | Later synonym of Aquimarina. | ICNB |
| Gagea | Liliales | Mabberley (2008) | Liliaceae. | ICBN |
| Gagnebina | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gagnepainia | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Gahnia | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Gaiadendron | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Gaiella | Gaiellales | Albuquerque et al. (2011) | . | ICNB |
| Gaillardia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gaimardia | Poales | Mabberley (2008) | Centrolepidaceae. | ICBN |
| Gainia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gajewskiella | Pleuronematida | Lynn (2008) | . | ICZN |
| Galactia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Galactites | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Galactophora | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Galago | Primates | McKenna & Bell (1997) | . | ICZN |
| Galanthula | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Galanthus | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Galatella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Galatheammina | Psamminida | Gooday & Tendal (2000) | . | ICZN |
| Galatheanthemum | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Galax | Ericales | Mabberley (2008) | Diapensiaceae. | ICBN |
| Galaxaura | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Galaxea | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Galbalcyrhynchus | Galbuliformes | Clements (2007) | . | ICZN |
| Galbibacter | Flavobacteriales | Khan et al. (2007) | . | ICNB |
| Galbula | Galbuliformes | Clements (2007) | . | ICZN |
| Galbulimima | Magnoliales | Mabberley (2008) | Himantandraceae. | ICBN |
| Galdieria | Cyanidiales | Schneider & Wynne (2007) | . | ICBN |
| Galea | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Galeana | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Galeandra | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Galearia | Malpighiales | Mabberley (2008) | Pandaceae. | ICBN |
| Galearis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Galega | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Galeidinium | Peridiniales | Tamura et al. (2005) | Closely related to Kryptoperidinium. | ICBN |
| Galemys | Eulipotyphla | McKenna & Bell (1997); Murphy et al. (2001) | . | ICZN |
| Galenea | Thiotrichales | Giovannelli et al. (2012) | . | ICNB |
| Galenia | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Galenomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Galeocerdo | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Galeola | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Galeomma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Galeopsis | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Galeopterus | Dermoptera | Stafford (2005) | . | ICZN |
| Galeorhinus | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Galeottia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Galeottiella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Galerella | Carnivora | Wozencraft (2005) | . | ICZN |
| Galerida | Passeriformes | Clements (2007) | . | ICZN |
| Galeus | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Galictis | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Galidia | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Galidictis | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Galiniera | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Galinsoga | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Galipea | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Galitzkya | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Galium | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gallaecimonas | | Rodríguez-Blanco et al. (2010) | Domain Bacteria - Phylum Proteobacteria - Class Gammaproteobacteria. Chromatiales?. | ICNB |
| Gallardoa | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Gallesia | Caryophyllales | Mabberley (2008) | Phytolaccaceae. | ICBN |
| Gallibacterium | Pasteurellales | Garrity et al. (2005) | . | ICNB |
| Gallicola | Clostridiales | Garrity et al. (2005) | . | ICNB |
| Gallicolumba | Columbiformes | Clements (2007) | . | ICZN |
| Gallicrex | Gruiformes | Clements (2007) | . | ICZN |
| Gallienia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gallinago | Charadriiformes | Clements (2007) | . | ICZN |
| Gallinula | Gruiformes | Clements (2007) | . | ICZN |
| Gallionella | Nitrosomonadales | Garrity et al. (2005) | . | ICNB |
| Gallirallus | Gruiformes | Clements (2007) | . | ICZN |
| Gallitellia | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992); Özdikmen (2009) | Junior homonym. Substituted by Neogallitellia. | ICZN |
| Galloperdix | Galliformes | Clements (2007) | . | ICZN |
| Gallotia | Squamata | Vitt & Caldwell (2009) | Lacertidae. | ICZN |
| Gallus | Galliformes | Clements (2007) | . | ICZN |
| Galopina | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Galphimia | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Galpinia | Myrtales | Mabberley (2008) | Lythraceae. | ICBN |
| Galvezia | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Galwayella | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ellipsolagenidae. | ICZN |
| Gamanthera | Laurales | Mabberley (2008) | Lauraceae. | ICBN |
| Gamanthus | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Gamaster | Stolidobranchia | Monniot & Monniot (1972); Kott (1998); Monniot (2001) | Junior synonym of Eugyra. | ICZN |
| Gambelia | Squamata | Vitt & Caldwell (2009) | Iguanidae. | ICZN |
| Gambelia | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Gambierdiscus | Gonyaulacales | Fensome et al. (1993) | . | ICBN |
| Gamblea | Apiales | Mabberley (2008) | Araliaceae. | ICBN |
| Gammiella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Gamocarpha | Asterales | Mabberley (2008) | Calyceraceae. | ICBN |
| Gamochaeta | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gamochaetopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gamocystis | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gamotopea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gampsonyx | Falconiformes | Clements (2007) | . | ICZN |
| Gampsorhynchus | Passeriformes | Clements (2007) | . | ICZN |
| Ganapatiella | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Ganesha | Ganeshida | Harbison & Madin (1982) | . | ICZN |
| Gangjinia | Flavobacteriales | Lee et al. (2011) | . | ICNB |
| Gangliostoma | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Ganguelia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Ganguleea | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Ganonema | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Ganophyllum | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Ganymedes | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gaoligongshania | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Garberia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Garcia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Garciella | Clostridiales | Miranda-Tello et al. (2003) | . | ICNB |
| Garcilassa | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Garcinia | Malpighiales | Mabberley (2008) | Guttiferae. | ICBN |
| Garckea | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Gardenia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gardeniopsis | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gardineria | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Gardineroseris | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Gardnerella | Bifidobacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Gardneria | Gentianales | Mabberley (2008) | Loganiaceae. | ICBN |
| Gardneriella | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gardnerina | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gardnerula | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Gargarius | Rhynchodida | Lynn (2008) | . | ICZN |
| Garhadiolus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Garidella | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Garnhamia | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Garnieria | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Garnotia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Garovaglia | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Garrettia | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Garrodia | Procellariiformes | Clements (2007) | . | ICZN |
| Garrulax | Passeriformes | Clements (2007) | . | ICZN |
| Garrulus | Passeriformes | Clements (2007) | . | ICZN |
| Garrya | Garryales | Mabberley (2008) | Garryaceae. | ICBN |
| Garuga | Sapindales | Mabberley (2008) | Burseraceae. | ICBN |
| Garuleum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Garveia | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Gassovskiella | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Gasteranthus | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Gasterascidia | Aspiraculata | Monniot & Monniot (1972); Monniot & Monniot (1990); Kott (1998); Monniot (2001) | Junior synonym of Oligotrema. | ICZN |
| Gasteria | Asparagales | Mabberley (2008) | Asphodelaceae. | ICBN |
| Gastonia | Apiales | Mabberley (2008) | Araliaceae. | ICBN |
| Gastridium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gastroblasta | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gastrochilus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gastrocirrhus | Euplotida | Lynn (2008) | . | ICZN |
| Gastroclonium | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gastrococos | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Gastrocotyle | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Gastrodia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gastrolepis | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Gastrolobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gastronauta | Chlamydodontida | Lynn (2008) | . | ICZN |
| Gastrophanella | | Pisera & Lévi (2002) | Domain Eucarya - Kingdom Animalia - Phylum Porifera - Class Demospongiae (lithistids) Siphonidiidae. | ICZN |
| Gastropholis | Squamata | Vitt & Caldwell (2009) | Lacertidae. | ICZN |
| Gastrophryne | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Gastropion | Heteronemertea | Kajihara et al. (2008) | . | ICZN |
| Gastropus | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Gastropyxis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gastrosticha | | Lynn (2008) | Domain Eucarya - Kingdom Alveolatobiontes - Phylum Ciliophora - Class Spirotrichea - Subclass Stichotrichia. Nomen dubium. | ICZN |
| Gastrostyla | Sporadotrichida | Lynn (2008) | . | ICZN |
| Gastrotheca | Anura | Vitt & Caldwell (2009) | Amphignathodontidae. | ICZN |
| Gattya | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gattya | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gaudichaudia | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Gaudinia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gaudryina | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Verneuilinidae. | ICZN |
| Gaultheria | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Gaumiella | Mischococcales | Ettl (1978) | . | ICBN |
| Gaussia | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Gavarretia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Gavelinopsis | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Rosalinidae. | ICZN |
| Gavia | Gaviiformes | Clements (2007) | . | ICZN |
| Gavialis | Crocodylia | Vitt & Caldwell (2009) | Gavialidae. | ICZN |
| Gavilea | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gaya | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gayliella | Ceramiales | Wynne & Schneider (2010) | . | ICBN |
| Gaylussacia | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Gayophytum | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Gazania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gazella | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Gazelletta | Phaeogromida | Takahashi & Anderson (2000) | . | ICZN |
| Geagras | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Geamphorella | Arcellinida | Meisterfeld (2000) | incertae sedis. | ICZN |
| Gearum | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Gecinulus | Piciformes | Clements (2007) | . | ICZN |
| Geckoella | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Geckolepis | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Geckonia | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Geesinkorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gegeneophis | Gymnophiona | Vitt & Caldwell (2009) | "Caeciliidae". | ICZN |
| Gehyra | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Geigeria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Geijera | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Geimania | Clevelandellida | Lynn (2008) | . | ICZN |
| Geissanthus | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Geissaspis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Geissois | Oxalidales | Mabberley (2008) | Cunoniaceae. | ICBN |
| Geissolepis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Geissoloma | Crossosomatales | Mabberley (2008) | Geissolomataceae. | ICBN |
| Geissomeria | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Geissorhiza | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Geissospermum | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Geitleria | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Geitleribactron | Synechococcales | Hoffmann et al. (2005) | . | ICBN |
| Geitlerinema | Pseudanabaenales | Hoffmann et al. (2005) | . | ICBN |
| Geitonoplesium | Asparagales | Mabberley (2008) | Hemerocallidaceae. | ICBN |
| Gekko | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gelanemertes | Pelagica | Gibson (1995) | . | ICZN |
| Gelasine | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Geleia | Protoheterotrichida | Lynn (2008) | . | ICZN |
| Geleznowia | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Gelidibacter | Flavobacteriales | Garrity et al. (2005) | . | ICNB |
| Gelidiella | Gelidiales | Schneider & Wynne (2007) | . | ICBN |
| Gelidiocolax | Gracilariales | Schneider & Wynne (2007) | . | ICBN |
| Gelidiopsis | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gelidium | Gelidiales | Schneider & Wynne (2007) | . | ICBN |
| Gelidocalamus | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gelinaria | Cryptonemiales | Silva (2002); Schneider & Wynne (2007) | . | ICBN |
| Gellertia | Protoheterotrichida | Lynn (2008) | . | ICZN |
| Gelliodes | Haplosclerida | Desqueyroux-Faúndez & Valentine (2002) | . | ICZN |
| Gelochelidon | Charadriiformes | Clements (2007) | . | ICZN |
| Gelria | Thermoanaerobacterales | Garrity et al. (2005); Ludwig et al. (2009) | . | ICNB |
| Gelsemium | Gentianales | Mabberley (2008) | Gelsemiaceae. | ICBN |
| Gemella | Bacillales | Garrity et al. (2005) | . | ICNB |
| Gemellides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Heterolepidae. | ICZN |
| Geminella | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Geminicoccus | Rhodospirillales | Foesel et al. (2008) | . | ICNB |
| Geminigera | Pyrenomonadales | Clay et al. (1999); Novarino (2003) | . | ICBN |
| Geminocystis | Chroococcales | Hoffmann et al. (2005); Korelusová et al. (2009) | . | ICBN |
| Geminospira | Robertinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Robertinidae. | ICZN |
| Gemmata | Planctomycetales | Garrity et al. (2005) | . | ICNB |
| Gemmatimonas | Gemmatimonadales | Garrity et al. (2005) | . | ICNB |
| Gemmicephalus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gemmiger | Rhizobiales | Garrity et al. (2005) | . | ICNB |
| Gemmobacter | Rhodobacterales | Garrity et al. (2005) | . | ICNB |
| Gemmocystis | Agamococcidiorida | Perkins et al. (2000) | . | ICZN |
| Geneiorhynchus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Genetta | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Genicularia | Desmidiales | Gontcharov et al. (2003) | Synonymous to Gonatozygon. | ICBN |
| Geniculus | Zygnematales | Gontcharov (2008) | . | ICBN |
| Geniostemon | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Geniostoma | Gentianales | Mabberley (2008) | Loganiaceae. | ICBN |
| Genipa | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Genista | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Genistidium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Genlisea | Lamiales | Mabberley (2008) | Lentibulariaceae. | ICBN |
| Gennaria | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Genophryne | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Genoplesium | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gentiana | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Gentianella | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Gentianopsis | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Gentianothamnus | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Gentingia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Genyorchis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Geoalkalibacter | Desulfuromonales | Zavarzina et al. (2006) | . | ICNB |
| Geobacillus | Bacillales | Garrity et al. (2005) | . | ICNB |
| Geobacter | Desulfuromonales | Garrity et al. (2005) | . | ICNB |
| Geobates | Passeriformes | Clements (2007) | . | ICZN |
| Geobatrachus | Anura | Vitt & Caldwell (2009) | Brachycephalidae. | ICZN |
| Geoblasta | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Geocalamus | Squamata | Vitt & Caldwell (2009) | Amphisbaenidae. | ICZN |
| Geocalyx | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Geocapromys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Geocarpon | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Geocaryum | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Geocaulon | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Geocharis | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Geochelone | Testudinata | Vitt & Caldwell (2009) | Testudinidae. | ICZN |
| Geoclemys | Testudinata | Vitt & Caldwell (2009) | Geomydidae. | ICZN |
| Geococcus | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Geococcyx | Cuculiformes | Clements (2007) | . | ICZN |
| Geocolaptes | Piciformes | Clements (2007) | . | ICZN |
| Geocrinia | Anura | Vitt & Caldwell (2009) | Myobatrachidae. | ICZN |
| Geodermatophilus | Frankiales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Geodia | Astrophorida | Uriz (2002) | . | ICZN |
| Geodinium | | Fensome et al. (1993) | Domain Eucarya - Phylum Dinozoa - Superclass Dinokaryota. | ICBN |
| Geodipsas | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Geodipsas | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Geodorum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Geoemyda | Testudinata | Vitt & Caldwell (2009) | Geomydidae. | ICZN |
| Geoffroea | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Geoffroyus | Psittaciformes | Clements (2007) | . | ICZN |
| Geofilum | Bacteroidales | Miyazaki et al. (2012) | . | ICNB |
| Geogale | Afrosoricida | McKenna & Bell (1997); Stanhope et al. (1998) | Tenrecidae. | ICZN |
| Geogenanthus | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Geoglobus | Archaeoglobales | Garrity et al. (2005) | . | ICNB |
| Geohintonia | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Geolegnia | Saprolegniales | Dick (2001); Kirk et al. (2008) | Saprolegniaceae. | ICBN |
| Geomackiea | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Geomalia | Passeriformes | Clements (2007) | . | ICZN |
| Geomicrobium | Bacillales | Echigo et al. (2010) | . | ICNB |
| Geomyersia | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Geomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Geonemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Geonoma | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Geopelia | Columbiformes | Clements (2007) | . | ICZN |
| Geophaps | Columbiformes | Clements (2007) | . | ICZN |
| Geophila | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Geophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Geoplagiopyxis | Arcellinida | Meisterfeld (2000) | Difflugina -- Plagiopyxidae. | ICZN |
| Geopsittacus | Psittaciformes | Clements (2007) | . | ICZN |
| Geopsychrobacter | Desulfuromonales | Holmes et al. (2004) | . | ICNB |
| Geopyxella | Arcellinida | Meisterfeld (2000) | Difflugina -- Trigonopyxidae. | ICZN |
| Georgeantha | Poales | Mabberley (2008) | Ecdeiocoleaceae. | ICBN |
| Georgenia | Micrococcales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Georgevitschiella | Astomatida | Lynn (2008) | . | ICZN |
| Georgfuchsia | | Weelink et al. (2009) | Domain Bacteria - Kingdom Bacteria - Phylum Proteobacteria - Class Betaproteobacteria. | ICNB |
| Georgiella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Georychus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Geoscincus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Geosiris | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Geositta | Passeriformes | Clements (2007) | . | ICZN |
| Geospiza | Passeriformes | Clements (2007) | . | ICZN |
| Geosporobacter | Clostridiales | Klouche et al. (2007) | . | ICNB |
| Geostachys | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Geothallus | Sphaerocarpales | Crandall-Stotler et al. (2009) | . | ICBN |
| Geothermobacter | Desulfuromonales | Kashefi et al. (2003) | . | ICNB |
| Geothlypis | Passeriformes | Clements (2007) | . | ICZN |
| Geothrix | Holophagales | Garrity et al. (2005); Fukunaga et al. (2008) | . | ICNB |
| Geotoga | Thermotogales | Garrity et al. (2005) | . | ICNB |
| Geotria | Petromyzontiformes | Nelson (2006) | . | ICZN |
| Geotrygon | Columbiformes | Clements (2007) | . | ICZN |
| Geotrypetes | Gymnophiona | Vitt & Caldwell (2009) | "Caeciliidae". | ICZN |
| Geovibrio | Geovibriales | Garrity et al. (2005) | . | ICNB |
| Geoxus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Gephyramoeba | Leptomyxida | Rogerson & Patterson (2000); Smirnov et al. (2008) | . | ICZN |
| Gephyrocapsa | Isochrysidales | Edvardsen et al. (2000); Jordan et al. (2004) | Noëlaerhabdaceae. | ICBN |
| Gephyromantis | Anura | Vitt & Caldwell (2009) | Mantellidae. | ICZN |
| Geraea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Geranium | Geraniales | Mabberley (2008) | Geraniaceae. | ICBN |
| Geranoaetus | Falconiformes | Clements (2007) | . | ICZN |
| Geranospiza | Falconiformes | Clements (2007) | . | ICZN |
| Gerarda | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gerardiina | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Gerbera | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gerbilliscus | Rodentia | Musser & Carleton (2005) | . | ICZN |
| Gerbillurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Gerbillus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Gerda | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Gerhildiella | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Germainia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Geronticus | Ciconiiformes | Clements (2007) | . | ICZN |
| Geropogon | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gerrardanthus | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Gerrardina | Huerteales | Mabberley (2008) | Gerrardinaceae. | ICBN |
| Gerrhonotus | Squamata | Vitt & Caldwell (2009) | Anguidae. | ICZN |
| Gerrhosaurus | Squamata | Vitt & Caldwell (2009) | Cordylidae. | ICZN |
| Gerritea | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gersemia | Alcyonacea | Bayer (1981) | Nephtheidae. | ICZN |
| Gertrudiella | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Gerygone | Passeriformes | Clements (2007) | . | ICZN |
| Geryonia | Trachymedusae | Bouillon et al. (2006) | . | ICZN |
| Gesneria | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Gesnouinia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Gethyllis | Asparagales | Mabberley (2008) | Amaryllidaceae. | ICBN |
| Getonia | Myrtales | Mabberley (2008) | Combretaceae. | ICBN |
| Geum | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Geusia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Gevuina | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Ghaznianthus | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Ghikaea | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Giardia | Diplomonadida | Brugerolle & Lee (2000) | . | ICZN |
| Gibasis | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Gibasoides | Commelinales | Mabberley (2008) | Commelinaceae. | ICBN |
| Gibbaeum | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Gibbaria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gibbodiscus | | Rogerson & Patterson (2000); Cavalier-Smith et al. (2004); Smirnov et al. (2011) | Domain Eucarya - Phylum Amoebozoa - Class Discosea; Hyalodiscidae. | ICZN |
| Gibbsia | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Gibbsiella | Enterobacteriales | Brady et al. (2010) | . | ICNB |
| Gibsmithia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gibsoniothamnus | Lamiales | Mabberley (2008) | Schlegeliaceae. | ICBN |
| Giesbergeria | Burkholderiales | Grabovich et al. (2006) | . | ICNB |
| Gigaductus | Neogregarinorida | Perkins et al. (2000) | . | ICZN |
| Gigantochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gigantomonas | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Gigantorhynchus | Gigantorhynchida | Amin (1985) | . | ICZN |
| Gigantotheca | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gigantothrix | Sporadotrichida | Lynn (2008) | . | ICZN |
| Gigartacon | Chaunacanthida | Febvre et al. (2000) | . | ICZN |
| Gigartina | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gigasiphon | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gigaspermum | Gigaspermales | Goffinet et al. (2009) | . | ICBN |
| Gilberta | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gilbertiodendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gilchristia | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Gilgiochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gilia | Siphonophorae | Bouillon et al. (2006) | . | ICZN |
| Gilia | Ericales | Mabberley (2008) | Polemoniaceae. | ICBN |
| Giliastrum | Ericales | Mabberley (2008) | Polemoniaceae. | ICBN |
| Gillbeea | Oxalidales | Mabberley (2008) | Cunoniaceae. | ICBN |
| Gillenia | Rosales | Mabberley (2008) | Rosaceae. | ICBN |
| Gillespiea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gilletiodendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gilliesia | Asparagales | Mabberley (2008) | Alliaceae. | ICBN |
| Gillisia | Flavobacteriales | Van Trappen et al. (2004) | . | ICNB |
| Gilmania | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Gilruthia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gilvibacter | Flavobacteriales | Khan et al. (2007) | . | ICNB |
| Gilvimarinus | | Du et al. (2009) | Domain Bacteria - Phylum Proteobacteria - Class Gammaproteobacteria. | ICNB |
| Ginalloa | Santalales | Mabberley (2008) | Santalaceae. | ICBN |
| Ginesina | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hormosinidae. | ICZN |
| Gingidia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Ginglymostoma | Orectolobiformes | Nelson (2006) | . | ICZN |
| Ginkgo | Ginkgoales | Mabberley (2008); Christenhusz et al. (2011) | . | ICBN |
| Ginoria | Myrtales | Mabberley (2008) | Lythraceae. | ICBN |
| Giraffa | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Artiodactyla. | ICZN |
| Giraldiella | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Girardinia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Giraudyopsis | Chrysomeridales | Preisig (1995) | . | ICBN |
| Girgensohnia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Gironniera | Rosales | Mabberley (2008) | Celtidaceae. | ICBN |
| Gisekia | Caryophyllales | Mabberley (2008) | Sarcobataceae. | ICBN |
| Githopsis | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Givotia | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Gjellerupia | Santalales | Mabberley (2008) | Opiliaceae. | ICBN |
| Glabratella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glabratellidae. | ICZN |
| Glabratellina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glabratellidae. | ICZN |
| Glaciecola | Alteromonadales | Garrity et al. (2005) | . | ICNB |
| Glaciera | Ploima | Segers (2002); Segers (2007) | . | ICZN |
| Glaciibacter | Micrococcales | Katayama et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Glaciimonas | Burkholderiales | Zhang et al. (2011) | . | ICNB |
| Gladiolimon | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Gladiolithus | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | incertae sedis. | ICBN |
| Gladiolus | Asparagales | Mabberley (2008) | Iridaceae. | ICBN |
| Gladiopappus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glaeseria | Euamoebida | Rogerson & Patterson (2000); Smirnov et al. (2005) | . | ICZN |
| Glandiceps | Helminthomorpha | Benito (1982) | Spengelidae. | ICZN |
| Glandonia | Malpighiales | Mabberley (2008) | Malpighiaceae. | ICBN |
| Glandularia | Lamiales | Mabberley (2008) | Verbenaceae. | ICBN |
| Glandulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Glanirana | Anura | Vitt & Caldwell (2009) | Ranidae. | ICZN |
| Glaphyrammina | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Discamminidae. | ICZN |
| Glaphyromorphus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Glaphyrosiphon | Cryptonemiales | Hommersand et al. (2010) | . | ICBN |
| Glaphyrymenia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Glareola | Charadriiformes | Clements (2007) | . | ICZN |
| Glastaria | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Glaucidium | Strigiformes | Clements (2007) | . | ICZN |
| Glaucidium | Ranunculales | Mabberley (2008) | Ranunculaceae. | ICBN |
| Glaucis | Apodiformes | Clements (2007) | . | ICZN |
| Glaucium | Ranunculales | Mabberley (2008) | Papaveraceae. | ICBN |
| Glaucoammina | Textulariida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glaucoamminidae. | ICZN |
| Glaucocystis | Glaucocystales | Kies & Kremer (1986) | . | ICBN |
| Glaucocystopsis | Glaucocystales | Kies & Kremer (1986) | . | ICBN |
| Glaucoma | Tetrahymenida | Lynn (2008) | . | ICZN |
| Glaucomella | Tetrahymenida | Lynn (2008) | . | ICZN |
| Glaucomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Glauconema | Philasterida | Lynn (2008) | . | ICZN |
| Glauconema | Porphyridiales | Schneider & Wynne (2007) | . | ICBN |
| Glauconycteris | Chiroptera | Simmons (2005) | . | ICZN |
| Glaucosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Glaucosphaera | Dixoniellales | Schneider & Wynne (2007); Yokoyama et al. (2009) | . | ICBN |
| Glaucospira | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Glaux | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Glaziophyton | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Glaziovianthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gleadovia | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Gleasonia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gleba | | Fensome et al. (1993) | Domain Eucarya - Phylum Dinozoa - Superclass Dinokaryota. | ICBN |
| Glebionis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glechoma | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Glechon | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Gleditsia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Glehnia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gleichenella | Gleicheniales | Christenhusz et al. (2011) | . | ICBN |
| Gleichenia | Gleicheniales | Christenhusz et al. (2011) | . | ICBN |
| Glekia | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Glennbrownia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glabratellidae. | ICZN |
| Glenniea | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Glenoaulax | | Fensome et al. (1993) | Domain Eucarya - Phylum Dinozoa - Superclass Dinokaryota. | ICBN |
| Glenodiniopsis | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Glenodinium | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Glia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gliactis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Glinus | Caryophyllales | Mabberley (2008) | Molluginaceae. | ICBN |
| Glionnetia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gliricidia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Glironia | Ameridelphia | McKenna & Bell (1997) | . | ICZN |
| Glirulus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Glis | Rodentia | Holden (2005) | Earlier synonym of Myoxus. | ICZN |
| Glischrocaryon | Saxifragales | Mabberley (2008) | Haloragaceae. | ICBN |
| Glischrocolla | Myrtales | Mabberley (2008) | Crypteroniaceae. | ICBN |
| Glischropus | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Glischrothamnus | Caryophyllales | Mabberley (2008) | Molluginaceae. | ICBN |
| Gliscolithus | Coccolithales | Jordan et al. (2004); Edvardsen & Medlin (2007) | former Calyptrosphaeraceae. | ICBN |
| Globba | Zingiberales | Mabberley (2008) | Zingiberaceae. | ICBN |
| Globicatella | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Globicephala | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Globidiellum | Piroplasmorida | Perkins et al. (2000) | . | ICZN |
| Globigerina | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globigerinidae. | ICZN |
| Globigerinella | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globigerinidae. | ICZN |
| Globigerinoides | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globigerinidae. | ICZN |
| Globigerinoidesella | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globigerinidae. | ICZN |
| Globimetula | Santalales | Mabberley (2008) | Loranthaceae. | ICBN |
| Globipelorhiza | Astrorhizida | Kaminski (2000) | Komokiacea. | ICZN |
| Globisporangium | Pythiales | Uzuhashi et al. (2010) | . | ICBN |
| Globobulimina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Buliminidae. | ICZN |
| Globocassidulina | Buliminida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cassidulinidae. | ICZN |
| Globofissurella | Lagenida | Patterson (1986); Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Lagenidae. | ICZN |
| Globorotalia | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globorotaliidae. | ICZN |
| Globospora | Bivalvulida | Lom & Dyková (2006) | . | ICZN |
| Globotextularia | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globotextulariidae. | ICZN |
| Globoturborotalita | Globigerinida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Globigerinidae. | ICZN |
| Globularia | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Globulariopsis | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Globulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Globulinella | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Globulocephalus | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Globulotuba | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Globulotuboides | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Glandulinidae. | ICZN |
| Glochidion | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Glochidotheca | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gloeobacter | Gloeobacterales | Cavalier-Smith (2002) | . | ICBN |
| Gloeobotrys | Mischococcales | Ettl (1978) | . | ICBN |
| Gloeocapsa | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Gloeocapsopsis | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Gloeocarpus | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Gloeochaete | Gloeochaetales | Kies & Kremer (1986) | . | ICBN |
| Gloeochloris | Heterogloeales | Ettl (1978) | . | ICBN |
| Gloeochrysis | Hibberdiales | Kristiansen & Preisig (2001); Cavalier-Smith & Chao (2006) | Chrysocapsaceae (uniflagellate). | ICBN |
| Gloeophycus | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gloeopodium | Mischococcales | Ettl (1978) | . | ICBN |
| Gloeoskene | Mischococcales | Ettl (1978) | . | ICBN |
| Gloeospermum | Malpighiales | Mabberley (2008) | Violaceae. | ICBN |
| Gloeosphaeridium | Mischococcales | Ettl (1978) | . | ICBN |
| Gloeothece | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Gloeotila | Prasiolales | Eliáš & Neustupa (2009) | As Stichococcus/Raphidonema clade. | ICBN |
| Gloeotrichia | Nostocales | Hoffmann et al. (2005) | . | ICBN |
| Gloiocladia | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gloiocolax | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gloioderma | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gloiogullmia | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Allogromiidae. | ICZN |
| Gloiopeltis | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gloiophloea | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Gloiophyllis | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gloiosaccion | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Gloiosiphonia | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gloiotrichus | Nemaliales | Schneider & Wynne (2007) | . | ICBN |
| Glomera | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Glomeropitcairnia | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Glomospira | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Ammodiscidae. | ICZN |
| Glomulina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Fischerinidae. | ICZN |
| Gloriosa | Liliales | Mabberley (2008) | Colchicaceae. | ICBN |
| Glossarion | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glossobalanus | Helminthomorpha | Benito (1982) | Ptychoderidae. | ICZN |
| Glossocalyx | Laurales | Mabberley (2008) | Siparunaceae. | ICBN |
| Glossocardia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glossocarya | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Glossochilus | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Glossodia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Glossomastix | Pinguiochrysidales | Kawachi et al. (2002) | . | ICBN |
| Glossonema | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Glossopappus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glossopetalon | Crossosomatales | Mabberley (2008) | Crossosomataceae. | ICBN |
| Glossophaga | Chiroptera | McKenna & Bell (1997) | . | ICZN |
| Glossopsitta | Psittaciformes | Clements (2007) | . | ICZN |
| Glossostelma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Glossostemon | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Glossostigma | Lamiales | Mabberley (2008) | Phrymaceae. | ICBN |
| Glossostipula | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Glottiphyllum | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Gloveria | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Gloxinia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Gloydius | Squamata | Vitt & Caldwell (2009) | Serpentes. Viperidae. | ICZN |
| Gluconacetobacter | Rhodospirillales | Garrity et al. (2005) | . | ICNB |
| Gluconobacter | Rhodospirillales | Garrity et al. (2005) | . | ICNB |
| Gluema | Ericales | Mabberley (2008) | Sapotaceae. | ICBN |
| Glugea | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Glugoides | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Glumicalyx | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Gluta | Sapindales | Mabberley (2008) | Anacardiaceae. | ICBN |
| Glyceria | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Glycichaera | Passeriformes | Clements (2007) | . | ICZN |
| Glycine | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Glycomyces | Glycomycetales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Glycosmis | Sapindales | Mabberley (2008) | Rutaceae. | ICBN |
| Glycydendron | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Glycyrrhiza | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Glyphaea | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Glyphis | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Glyphochloa | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Glyphoglossus | Anura | Vitt & Caldwell (2009) | Microhylidae. | ICZN |
| Glyphomitrium | Dicranales | Goffinet et al. (2009) | . | ICBN |
| Glyphonycteris | Chiroptera | Simmons (2005) | . | ICZN |
| Glyphoperidium | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Glyphorynchus | Passeriformes | Clements (2007) | . | ICZN |
| Glyphotes | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Glyphotheciopsis | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Glyphothecium | Ptychomniales | Goffinet et al. (2009) | . | ICBN |
| Glyptopetalum | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Glyptopleura | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Glyptostrobus | Cupressales | Farjon (2001); Christenhusz et al. (2011) | . | ICBN |
| Gmelina | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Gnaphaliothamnus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gnaphalium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gnathostomaria | Bursovaginoidea | Sørensen (2002) | . | ICZN |
| Gnathostomula | Bursovaginoidea | Sørensen (2002) | . | ICZN |
| Gnephosis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gnetum | Gnetales | Mabberley (2008); Christenhusz et al. (2011) | . | ICBN |
| Gnidia | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Gnomophalium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gnorimopsar | Passeriformes | Clements (2007) | . | ICZN |
| Gnypetoscincus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Goacanthus | Echinorhynchida | Amin (1985) | . | ICZN |
| Goannagnathia | Bursovaginoidea | Sørensen (2002) | . | ICZN |
| Goatapitigba | Astrorhizida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polysaccamminidae. | ICZN |
| Gobbettia | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Haplophragmoididae. | ICZN |
| Gobiella | Aconchulinida | Bass et al. (2009) | . | ICZN |
| Gocevia | Himatismenida | Rogerson & Patterson (2000); Cavalier-Smith et al. (2004) | . | ICZN |
| Gochnatia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Godleya | Nostocales | Novis & Visnovsky (2011) | . | ICBN |
| Godmania | Lamiales | Mabberley (2008) | Bignoniaceae. | ICBN |
| Godoya | Malpighiales | Mabberley (2008) | Ochnaceae. | ICBN |
| Goebeliella | Porellales | Crandall-Stotler et al. (2009) | . | ICBN |
| Goebelobryum | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Goesella | Textulariida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Valvulinidae. | ICZN |
| Goethalsia | Apodiformes | Clements (2007) | . | ICZN |
| Goethalsia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Goetzea | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Goggia | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gogolia | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Golbergia | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Goldbachia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Goldmanella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Goldmania | Apodiformes | Clements (2007) | . | ICZN |
| Gollania | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Gollum | Carcharhiniformes | Nelson (2006) | . | ICZN |
| Golunda | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Golvanacanthus | Echinorhynchida | Amin (1985) | . | ICZN |
| Golvanorhynchus | Echinorhynchida | Amin (1985) | . | ICZN |
| Gomesa | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gomesophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gomocollariella | Arcellinida | Snegovaya & Alekperov (2005) | Bipseudostomatidae (classification not confirmed). | ICZN |
| Gomontiella | Oscillatoriales | Hoffmann et al. (2005) | . | ICBN |
| Gomortega | Laurales | Mabberley (2008) | Gomortegaceae. | ICBN |
| Gomphandra | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Gomphichis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gomphocalyx | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gomphocarpus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gomphogyne | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Gompholobium | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gomphosphaeria | Chroococcales | Hoffmann et al. (2005) | . | ICBN |
| Gomphostemma | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Gomphostigma | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Gomphrena | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Gonactinia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Gonatodes | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gonatogenia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gonatogyne | Malpighiales | Mabberley (2008) | Phyllanthaceae. | ICBN |
| Gonatopus | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Gonatostylis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gonatozygon | Desmidiales | Gontcharov (2008) | . | ICBN |
| Gonaxia | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gongora | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gongrodiscus | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Gongronema | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gongrospermum | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Gongrostylus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gongylanthus | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gongylocarpus | Myrtales | Mabberley (2008) | Onagraceae. | ICBN |
| Gongylolepis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gongylomorphus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Gongylophis | Squamata | Vitt & Caldwell (2009) | Serpentes. Boidae. | ICZN |
| Gongylosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gongylosoma | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gongylosperma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gongylotaxis | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gongylus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Goniastrea | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Gonimochaete | Myzocytiopsidales | Dick (2001); Kirk et al. (2008) | Myzocytiopsidaceae. | ICBN |
| Gonimocolax | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gonimophyllum | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Goniobryum | Rhizogoniales | Goffinet et al. (2009) | . | ICBN |
| Goniocaulon | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Goniochilus | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Goniochloris | Mischococcales | Ettl (1978) | . | ICBN |
| Goniocoma | Rhynchodida | Lynn (2008) | . | ICZN |
| Goniocorella | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Goniodinium | Gonyaulacales | Fensome et al. (1993) | . | ICBN |
| Goniodiscus | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Goniodoma | Gonyaulacales | Fensome et al. (1993); Özdikmen (2009); Nakada (2010) | Later synonym of Heteraulacus. | ICBN |
| Goniolimon | Caryophyllales | Mabberley (2008) | Plumbaginaceae. | ICBN |
| Gonioma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Goniomitrium | Funariales | Goffinet et al. (2009) | . | ICBN |
| Goniomonas | Goniomonadida | Clay et al. (1999); Novarino (2003) | . | ICZN |
| Gonionemus | Limnomedusae | Bouillon et al. (2006) | . | ICZN |
| Gonionotophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Goniophlebium | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Goniopora | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Goniorrhachis | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Goniothalamus | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Goniotrichopsis | Stylonematales | Schneider & Wynne (2007) | . | ICBN |
| Goniurosaurus | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gonocalyx | Ericales | Mabberley (2008) | Ericaceae. | ICBN |
| Gonocarpus | Saxifragales | Mabberley (2008) | Haloragaceae. | ICBN |
| Gonocaryum | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Gonocephalus | Squamata | Vitt & Caldwell (2009) | Agamidae. | ICZN |
| Gonocytisus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gonolobus | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gononemertes | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Gonospermum | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gonospora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gonostegia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Gonostomum | Sporadotrichida | Lynn (2008) | . | ICZN |
| Gonothyraea | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gontscharovia | Lamiales | Mabberley (2008) | Labiatae. | ICBN |
| Gonyaulax | Gonyaulacales | Fensome et al. (1993) | . | ICBN |
| Gonydactylus | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gonyophis | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gonyosoma | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gonyostomum | Raphidomonadales | Heywood & Leedale (2000) | . | ICBN |
| Gonystylus | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Gonzalagunia | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gonzeella | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Goodallia | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Goodenia | Asterales | Mabberley (2008) | Goodeniaceae. | ICBN |
| Goodfellowia | Pseudonocardiales | Labeda & Kroppenstedt (2006); Labeda et al. (2008) | Later homonym. Replaced by Goodfellowiella. | ICNB |
| Goodfellowiella | Pseudonocardiales | Labeda et al. (2008); Ludwig et al. (2012) | . | ICNB |
| Goodia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Goodmania | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Goodyera | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gopaliella | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gopherus | Testudinata | Vitt & Caldwell (2009) | Testudinidae. | ICZN |
| Gorceixia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gordionus | Gordioidea | Schmidt-Rhaesa (2002); Poinar Jr. (2008) | . | ICZN |
| Gordiospira | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Hemigordiopsidae. | ICZN |
| Gordius | Gordioidea | Schmidt-Rhaesa (2002); Poinar Jr. (2008) | . | ICZN |
| Gordonia | Corynebacteriales | Garrity et al. (2005); Ludwig et al. (2012) | . | ICNB |
| Gordonia | Ericales | Mabberley (2008) | Theaceae. | ICBN |
| Gordonibacter | Coriobacteriales | Würdemann et al. (2009); Ludwig et al. (2012) | . | ICNB |
| Gordoniella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Goreauiella | Agelasida | Vacelet (2002) | . | ICZN |
| Gorgonia | Alcyonacea | Bayer (1981) | Gorgoniidae. | ICZN |
| Gorgonidium | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Gorgonorhynchus | Heteronemertea | Gibson (1995) | . | ICZN |
| Gorgonosoma | Endogenida | Lynn (2008) | . | ICZN |
| Gorgorhynchoides | Echinorhynchida | Amin (1985) | . | ICZN |
| Gorgorhynchus | Echinorhynchida | Amin (1985) | . | ICZN |
| Gorilla | Primates | McKenna & Bell (1997) | . | ICZN |
| Gorillophilus | Entodiniomorphida | Lynn (2008) | . | ICZN |
| Gorsachius | Ciconiiformes | Clements (2007) | . | ICZN |
| Gorteria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gorytocephalus | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Gosela | Lamiales | Mabberley (2008) | Scrophulariaceae. | ICBN |
| Gossea | Limnomedusae | Bouillon et al. (2006) | . | ICZN |
| Gossia | Myrtales | Mabberley (2008) | Myrtaceae. | ICBN |
| Gossweilera | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gossweilerodendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gossypianthus | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Gossypioides | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gossypium | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gotoea | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Gotoius | Peridiniales | Fensome et al. (1993) | . | ICBN |
| Gottschea | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gottschelia | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gouania | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Gouinia | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Goupia | Malpighiales | Mabberley (2008) | Goupiaceae. | ICBN |
| Goura | Columbiformes | Clements (2007) | . | ICZN |
| Gousseffia | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Goussia | Eucoccidiorida | Jirků et al. (2002); Jirků et al. (2009) | . | ICZN |
| Govenia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Goyazia | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Goyazianthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Goydera | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Grabowskia | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Gracea | Olpidiopsidales | Dick (2001); Kirk et al. (2008) | Olpidiopsidales. | ICBN |
| Gracilaria | Gracilariales | Schneider & Wynne (2007) | . | ICBN |
| Gracilariocolax | | Schneider & Wynne (2007) | . | ICBN |
| Gracilariophila | Gracilariales | Schneider & Wynne (2007) | . | ICBN |
| Gracilariopsis | Gracilariales | Schneider & Wynne (2007) | . | ICBN |
| Gracilibacillus | Bacillales | Garrity et al. (2005) | . | ICNB |
| Gracilibacter | Clostridiales | Lee et al. (2006) | . | ICNB |
| Gracilimonas | | Choi et al. (2009); Ludwig et al. (2011) | Domain Bacteria - Phylum Bacteroidetes - Class Cytophagia. | ICNB |
| Gracilinanus | Ameridelphia | McKenna & Bell (1997) | . | ICZN |
| Graciliscincus | Squamata | Vitt & Caldwell (2009) | Scincidae. | ICZN |
| Gracilisentis | Neoechinorhynchida | Amin (1985) | . | ICZN |
| Gracula | Passeriformes | Clements (2007) | . | ICZN |
| Gracupica | Passeriformes | Clements (2007) | . | ICZN |
| Graderia | Lamiales | Mabberley (2008) | Orobanchaceae. | ICBN |
| Gradsteinia | Hypnales | Goffinet et al. (2009) | . | ICBN |
| Graellsia | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Graffenrieda | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Grafia | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Grafisia | Passeriformes | Clements (2007) | . | ICZN |
| Grainis | Peritrichida | Lynn (2008); Zhan et al. (2009) | . | ICZN |
| Grajalesia | Caryophyllales | Mabberley (2008) | Nyctaginaceae. | ICBN |
| Grallaria | Passeriformes | Clements (2007) | . | ICZN |
| Grallaricula | Passeriformes | Clements (2007) | . | ICZN |
| Grallatoria | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Grallina | Passeriformes | Clements (2007) | . | ICZN |
| Gramella | Flavobacteriales | Nedashkovskaya et al. (2005) | . | ICNB |
| Graminicola | Passeriformes | Clements (2007) | . | ICZN |
| Graminivora | Peronosporales | Kirk et al. (2008) | Peronosporaceae. | ICBN |
| Grammangis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Grammaria | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Grammatophyllum | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Grammatotheca | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Grammephora | Rhodymeniales | Schneider & Wynne (2007) | . | ICBN |
| Grammitis | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Grammomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Grammosciadium | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Grammosolen | Solanales | Mabberley (2008) | Solanaceae. | ICBN |
| Grammosperma | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Grampus | Cetartiodactyla | McKenna & Bell (1997); Murphy et al. (2001) | Cetacea. | ICZN |
| Granatellus | Passeriformes | Clements (2007) | . | ICZN |
| Granatina | Passeriformes | Clements (2007) | . | ICZN |
| Grandala | Passeriformes | Clements (2007) | . | ICZN |
| Grandidiera | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Grandisonia | Gymnophiona | Vitt & Caldwell (2009) | "Caeciliidae". | ICZN |
| Grandoria | Colpodida | Lynn (2008) | . | ICZN |
| Grangea | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Grangeopsis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Grangeria | Malpighiales | Mabberley (2008) | Chrysobalanaceae. | ICBN |
| Grania | Acrochaetiales | Wynne & Schneider (2010) | . | ICBN |
| Granitites | Rosales | Mabberley (2008) | Rhamnaceae. | ICBN |
| Grantessa | Leucosolenida | Borojevic et al. (2002) | . | ICZN |
| Grantia | Leucosolenida | Borojevic et al. (2002) | . | ICZN |
| Grantiella | Passeriformes | Clements (2007) | . | ICZN |
| Grantilla | Leucosolenida | Borojevic et al. (2002) | . | ICZN |
| Grantiopsis | Leucosolenida | Borojevic et al. (2002) | . | ICZN |
| Granulibacter | Rhodospirillales | Greenberg et al. (2006) | . | ICNB |
| Granulicatella | Lactobacillales | Garrity et al. (2005) | . | ICNB |
| Granulicella | Acidobacteriales | Pankratov & Dedysh (2010) | . | ICNB |
| Granulicoccus | Propionibacteriales | Maszenan et al. (2007); Ludwig et al. (2012) | . | ICNB |
| Granulosicoccus | Chromatiales | Lee et al. (2007) | . | ICNB |
| Graomys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Graphandra | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Graphephorum | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Graphistemma | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Graphistylis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Graphiurus | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Graphorkis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Graptemys | Testudinata | Vitt & Caldwell (2009) | Emydidae. | ICZN |
| Graptopetalum | Saxifragales | Mabberley (2008) | Crassulaceae. | ICBN |
| Graptophyllum | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Grasseella | Eucoccidiorida | Perkins et al. (2000) | . | ICZN |
| Grateloupia | Cryptonemiales | Silva (2002); Schneider & Wynne (2007) | . | ICBN |
| Grateloupiocolax | Cryptonemiales | Silva (2002); Schneider & Wynne (2007) | . | ICBN |
| Gratiola | Lamiales | Mabberley (2008) | Plantaginaceae. | ICBN |
| Gratwickia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Grauanthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Graueria | Passeriformes | Clements (2007) | . | ICZN |
| Gravesia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Grayallia | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Graydidascalus | Psittaciformes | Clements (2007) | . | ICZN |
| Grayia | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Grayia | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Grazielia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Grazielodendron | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Grebnickiella | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gredgaria | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Greenea | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Greeneothallus | Fossombroniales | He-Nygrén et al. (2006); Crandall-Stotler et al. (2009) | . | ICBN |
| Greeniopsis | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Greenmaniella | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Greenwayodendron | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Gregarina | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gregoria | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Greigia | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Grellamoeba | Varipodida | Dyková et al. (2010) | Affinity with Acramoebidae is tentative. | ICZN |
| Grellia | Protococcidiorida | Perkins et al. (2000) | . | ICZN |
| Grenacheria | Ericales | Mabberley (2008) | Primulaceae. | ICBN |
| Grenoblia | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Greslania | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Greuetodinium | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Grevea | Solanales | Mabberley (2008) | Montiniaceae. | ICBN |
| Grevillea | Proteales | Mabberley (2008) | Proteaceae. | ICBN |
| Grewia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Greyia | Geraniales | Mabberley (2008) | Melianthaceae. | ICBN |
| Grias | Ericales | Mabberley (2008) | Lecythidaceae. | ICBN |
| Grielum | Malvales | Mabberley (2008) | Neuradaceae. | ICBN |
| Griffinia | Asparagales | Mabberley (2008) | Amaryllidaceae. | ICBN |
| Griffithella | Malpighiales | Mabberley (2008) | Podostemaceae. | ICBN |
| Griffithsia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Griffonia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Grigelis | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nodosariidae. | ICZN |
| Grimmeodendron | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Grimmia | Grimmiales | Goffinet et al. (2009) | . | ICBN |
| Grimontia | Vibrionales | Thompson et al. (2003); Garrity et al. (2005) | . | ICNB |
| Grindelia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Grinnellia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Grisebachianthus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Griselinia | Apiales | Mabberley (2008) | Griseliniaceae. | ICBN |
| Griseotyrannus | Passeriformes | Clements (2007) | . | ICZN |
| Grisollea | Icacinales | Mabberley (2008) | Icacinaceae. | ICBN |
| Grobya | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Groenbladia | Desmidiales | Gontcharov (2008) | . | ICBN |
| Groenlandia | Alismatales | Mabberley (2008) | Potamogetonaceae. | ICBN |
| Grollea | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gromia | Gromiida | Bass et al. (2009) | . | ICZN |
| Gronovia | Cornales | Mabberley (2008) | Loasaceae. | ICBN |
| Grosourdya | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Grossera | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Grossglockneria | Colpodida | Lynn (2008) | . | ICZN |
| Grosvenoria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Groutiella | Orthotrichales | Goffinet et al. (2009) | . | ICBN |
| Grubbia | Cornales | Mabberley (2008) | Grubbiaceae. | ICBN |
| Gruberella | Sporadotrichida | Lynn (2008) | . | ICZN |
| Gruberella | Schizopyrenida | Patterson et al. (2000) | . | ICZN |
| Gruberia | Heterotrichida | Lynn (2008) | . | ICZN |
| Grus | Gruiformes | Clements (2007) | . | ICZN |
| Grusonia | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Gryllotalpia | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gryllotalpicola | Micrococcales | Kim et al. (2012) | . | ICNB |
| Grypotyphlops | Squamata | Vitt & Caldwell (2009) | Serpentes. Typhlopidae. | ICZN |
| Guacamaya | Poales | Mabberley (2008) | Rapateaceae. | ICBN |
| Guadalcanaria | Passeriformes | Clements (2007) | . | ICZN |
| Guadua | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Guaduella | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Guaiacum | Zygophyllales | Mabberley (2008) | Zygophyllaceae. | ICBN |
| Guamatela | Crossosomatales | Mabberley (2008) | Guamatelaceae. | ICBN |
| Guancha | Clathrinida | Borojevic et al. (2002) | . | ICZN |
| Guanchezia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Guanduella | Allogromiida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Allogromiidae. | ICZN |
| Guapira | Caryophyllales | Mabberley (2008) | Nyctaginaceae. | ICBN |
| Guardiola | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guarea | Sapindales | Mabberley (2008) | Meliaceae. | ICBN |
| Guarianthe | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Guarouba | Psittaciformes | Clements (2007) | . | ICZN |
| Guatteria | Magnoliales | Mabberley (2008) | Annonaceae. | ICBN |
| Guayania | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guazuma | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gubernatrix | Passeriformes | Clements (2007) | . | ICZN |
| Gubernetes | Passeriformes | Clements (2007) | . | ICZN |
| Gueldenstaedtia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Guerramontesia | Pottiales | Cano et al. (2010) | . | ICBN |
| Guettarda | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Guevaria | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guggenheimella | Clostridiales | Wyss et al. (2005) | . | ICNB |
| Guibemantis | Anura | Vitt & Caldwell (2009) | Mantellidae. | ICZN |
| Guibourtia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Guichenotia | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Guiera | Myrtales | Mabberley (2008) | Combretaceae. | ICBN |
| Guihaia | Arecales | Mabberley (2008) | Palmae. | ICBN |
| Guihaiothamnus | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Guilandina | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Guilfoylia | Fabales | Mabberley (2008) | Surianaceae. | ICBN |
| Guillardia | Pyrenomonadales | Clay et al. (1999); Novarino (2003) | . | ICBN |
| Guillea | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Guilleminea | Caryophyllales | Mabberley (2008) | Amaranthaceae. | ICBN |
| Guillonea | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Guindilia | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Guinetia | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Guioa | Sapindales | Mabberley (2008) | Sapindaceae. | ICBN |
| Guira | Cuculiformes | Clements (2007) | . | ICZN |
| Guiraoa | Brassicales | Mabberley (2008) | Cruciferae. | ICBN |
| Guiryella | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Guitarra | Poecilosclerida | Hajdu & Lerner (2002) | . | ICZN |
| Guizotia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gulbenkiania | Neisseriales | Vaz-Moreira et al. (2007) | . | ICNB |
| Gullmarella | Nassulida | Lynn (2008) | . | ICZN |
| Gulo | Carnivora | McKenna & Bell (1997) | . | ICZN |
| Gulosibacter | Micrococcales | Manaia et al. (2004); Ludwig et al. (2012) | . | ICNB |
| Gulsonia | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gundelia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gundlachia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gunillaea | Asterales | Mabberley (2008) | Campanulaceae. | ICBN |
| Gunnarella | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gunnera | Gunnerales | Mabberley (2008) | Gunneraceae. | ICBN |
| Gunnessia | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gunniopsis | Caryophyllales | Mabberley (2008) | Aizoaceae. | ICBN |
| Guppyella | Lituolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Textulariellidae. | ICZN |
| Gurania | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Guraniopsis | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Gurgesiella | Rajiformes | Nelson (2006) | . | ICZN |
| Gurjanovella | Eumonostilifera | Gibson (1995); Chernyshev (2003) | . | ICZN |
| Gurleya | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Gurleyides | Microsporida | Canning & Vavra (2000) | . | ICZN |
| Gustavia | Ericales | Mabberley (2008) | Lecythidaceae. | ICBN |
| Gutenbergia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guthriea | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Gutierrezia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guttera | Galliformes | Clements (2007) | . | ICZN |
| Guttulina | Lagenida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Polymorphinidae. | ICZN |
| Guttulinopsis | Acrasida | Kirk et al. (2008) | . | ICZN |
| Gutzia | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Cibicididae. | ICZN |
| Guynesomia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Guynia | Scleractinia | Cairns et al. (1999) | . | ICZN |
| Guyonia | Myrtales | Mabberley (2008) | Melastomataceae. | ICBN |
| Guzmania | Poales | Mabberley (2008) | Bromeliaceae. | ICBN |
| Gyalophylax | Passeriformes | Clements (2007) | . | ICZN |
| Gyalopion | Squamata | Vitt & Caldwell (2009) | Serpentes. "Colubridae". | ICZN |
| Gygis | Charadriiformes | Clements (2007) | . | ICZN |
| Gyminda | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Gymnacranthera | Magnoliales | Mabberley (2008) | Myristicaceae. | ICBN |
| Gymnadenia | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gymnangium | Leptothecata | Bouillon et al. (2006) | . | ICZN |
| Gymnanthera | Gentianales | Mabberley (2008) | Apocynaceae. | ICBN |
| Gymnanthes | Malpighiales | Mabberley (2008) | Euphorbiaceae. | ICBN |
| Gymnarrhena | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnastica | Eutreptiales | Marin et al. (2003) | Synonymous to Eutreptiella. | ICBN |
| Gymnesina | Miliolida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Nubeculariidae. | ICZN |
| Gymnobelideus | Australidelphia | McKenna & Bell (1997) | . | ICZN |
| Gymnobucco | Piciformes | Clements (2007) | . | ICZN |
| Gymnocalycium | Caryophyllales | Mabberley (2008) | Cactaceae. | ICBN |
| Gymnocarpium | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Gymnocarpos | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Gymnocella | Phaeogymnocellida | Takahashi & Anderson (2000) | . | ICZN |
| Gymnochlora | Chlorarachniales | Ishida et al. (2007); Ota et al. (2007) | . | ICBN |
| Gymnocichla | Passeriformes | Clements (2007) | . | ICZN |
| Gymnocladus | Fabales | Mabberley (2008) | Leguminosae. | ICBN |
| Gymnocolea | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gymnocoleopsis | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gymnocondylus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnocoronis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnocrex | Gruiformes | Clements (2007) | . | ICZN |
| Gymnocyclidium | Pleuronematida | Alekperov (2009) | . | ICZN |
| Gymnodactylus | Squamata | Vitt & Caldwell (2009) | Gekkonidae. | ICZN |
| Gymnoderus | Passeriformes | Clements (2007) | . | ICZN |
| Gymnodinioides | Apostomatida | Lynn (2008) | . | ICZN |
| Gymnodinium | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Gymnodiscus | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnoglaux | Strigiformes | Clements (2007) | . | ICZN |
| Gymnogongrus | Gigartinales | Schneider & Wynne (2007) | . | ICBN |
| Gymnogonium | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Gymnogonos | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Gymnogrammitis | Polypodiales | Christenhusz et al. (2011) | . | ICBN |
| Gymnogyps | Falconiformes | Clements (2007) | . | ICZN |
| Gymnolaena | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnomitrion | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gymnomystax | Passeriformes | Clements (2007) | . | ICZN |
| Gymnomyza | Passeriformes | Clements (2007) | . | ICZN |
| Gymnopentzia | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnopetalum | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Gymnophaps | Columbiformes | Clements (2007) | . | ICZN |
| Gymnophellia | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Gymnophragma | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Gymnophrys | Aconchulinida | Bass et al. (2009) | Junior synonym of Biomyxa. | ICZN |
| Gymnophthalmus | Squamata | Vitt & Caldwell (2009) | Gymnophthalmidae. | ICZN |
| Gymnophycus | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gymnophyton | Apiales | Mabberley (2008) | Umbelliferae. | ICBN |
| Gymnopis | Gymnophiona | Vitt & Caldwell (2009) | "Caeciliidae". | ICZN |
| Gymnopithys | Passeriformes | Clements (2007) | . | ICZN |
| Gymnopodium | Caryophyllales | Mabberley (2008) | Polygonaceae. | ICBN |
| Gymnopogon | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gymnorete | Hexactinosida | Reiswig & Wheeler (2002) | . | ICZN |
| Gymnorhina | Passeriformes | Clements (2007) | . | ICZN |
| Gymnorhinus | Passeriformes | Clements (2007) | . | ICZN |
| Gymnoschoenus | Poales | Mabberley (2008) | Cyperaceae. | ICBN |
| Gymnosiphon | Dioscoreales | Mabberley (2008) | Burmanniaceae. | ICBN |
| Gymnosperma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnospermium | Ranunculales | Mabberley (2008) | Berberidaceae. | ICBN |
| Gymnosphaera | Gymnosphaerida | Mikrjukov et al. (2000); Adl et al. (2005) | Gymnosphaeridae. | ICZN |
| Gymnosphaera | Cyatheales | Christenhusz et al. (2011) | . | ICBN |
| Gymnospora | Eugregarinorida | Perkins et al. (2000) | . | ICZN |
| Gymnosporia | Celastrales | Mabberley (2008) | Celastraceae. | ICBN |
| Gymnostachys | Alismatales | Mabberley (2008) | Araceae. | ICBN |
| Gymnostachyum | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Gymnostemon | Sapindales | Mabberley (2008) | Simaroubaceae. | ICBN |
| Gymnostephium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gymnosteris | Ericales | Mabberley (2008) | Polemoniaceae. | ICBN |
| Gymnostinops | Passeriformes | Clements (2007) | . | ICZN |
| Gymnostoma | Fagales | Mabberley (2008) | Casuarinaceae. | ICBN |
| Gymnostomiella | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Gymnostomum | Pottiales | Goffinet et al. (2009) | . | ICBN |
| Gymnothamnion | Ceramiales | Schneider & Wynne (2007) | . | ICBN |
| Gymnotheca | Piperales | Mabberley (2008) | Saururaceae. | ICBN |
| Gymnozoum | Chlamydodontida | Lynn (2008) | . | ICZN |
| Gymnura | Myliobatiformes | Nelson (2006) | . | ICZN |
| Gymnuromys | Rodentia | McKenna & Bell (1997) | . | ICZN |
| Gynandrocarpa | Stolidobranchia | Monniot & Monniot (1972) | Styelidae. | ICZN |
| Gynatrix | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gynerium | Poales | Mabberley (2008) | Gramineae. | ICBN |
| Gynocardia | Malpighiales | Mabberley (2008) | Achariaceae. | ICBN |
| Gynochthodes | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gynocraterium | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Gynoglottis | Asparagales | Mabberley (2008) | Orchidaceae. | ICBN |
| Gynostemma | Cucurbitales | Mabberley (2008) | Cucurbitaceae. | ICBN |
| Gynotroches | Malpighiales | Mabberley (2008) | Rhizophoraceae. | ICBN |
| Gynoxys | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gynura | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gypaetus | Falconiformes | Clements (2007) | . | ICZN |
| Gypohierax | Falconiformes | Clements (2007) | . | ICZN |
| Gypothamnium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gyps | Falconiformes | Clements (2007) | . | ICZN |
| Gypsacanthus | Lamiales | Mabberley (2008) | Acanthaceae. | ICBN |
| Gypsina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Acervulinidae. | ICZN |
| Gypsophila | Caryophyllales | Mabberley (2008) | Caryophyllaceae. | ICBN |
| Gyptidium | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gyptis | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gyractis | Actiniaria | Fautin et al. (2007) | . | ICZN |
| Gyrandra | Gentianales | Mabberley (2008) | Gentianaceae. | ICBN |
| Gyranthera | Malvales | Mabberley (2008) | Malvaceae. | ICBN |
| Gyrinophilus | Caudata | Vitt & Caldwell (2009) | Plethodontidae. | ICZN |
| Gyrinops | Malvales | Mabberley (2008) | Thymelaeaceae. | ICBN |
| Gyrocarpus | Laurales | Mabberley (2008) | Hernandiaceae. | ICBN |
| Gyrocaryum | Boraginales | Mabberley (2008) | Boraginaceae. | ICBN |
| Gyrocheilos | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Gyrodiniellum | Gymnodiniales | Kang et al. (2011) | . | ICBN |
| Gyrodinium | Gymnodiniales | Fensome et al. (1993) | . | ICBN |
| Gyrodoma | Asterales | Mabberley (2008) | Compositae. | ICBN |
| Gyrogyne | Lamiales | Mabberley (2008) | Gesneriaceae. | ICBN |
| Gyroidella | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Gavelinellidae. | ICZN |
| Gyroidina | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Gavelinellidae. | ICZN |
| Gyroidinoides | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Gavelinellidae. | ICZN |
| Gyroidinopsis | Rotaliida | Loeblich Jr. & Tappan (1988); Loeblich Jr. & Tappan (1992) | Gavelinellidae. | ICZN |
| Gyromitus | Thaumatomonadida | Howe et al. (2011) | . | ICZN |
| Gyromonas | Diplomonadida | Brugerolle & Lee (2000) | . | ICZN |
| Gyronympha | Cristamonadida | Cepicka et al. (2010) | . | ICZN |
| Gyropaigne | Rhabdomonadales | Leedale (1967); Leedale (2000) | . | ICBN |
| Gyrophyllum | Pennatulacea | Williams (1995) | . | ICZN |
| Gyropora | Anthoathecata | Bouillon et al. (2006) | . | ICZN |
| Gyrosmilia | Scleractinia | Cairns et al. (1999); Veron (2000) | . | ICZN |
| Gyrostemon | Brassicales | Mabberley (2008) | Gyrostemonaceae. | ICBN |
| Gyrostipula | Gentianales | Mabberley (2008) | Rubiaceae. | ICBN |
| Gyrostoma | Actiniaria | Fautin et al. (2007) | Junior homonym, but no replacement name was published. | ICZN |
| Gyrotaenia | Rosales | Mabberley (2008) | Urticaceae. | ICBN |
| Gyrothyra | Jungermanniales | Crandall-Stotler et al. (2009) | . | ICBN |
| Gyroweisia | Pottiales | Goffinet et al. (2009) | . | ICBN |