Integrated Taxonomic Information System - Taxon Author Search Results


Taxon author: Gray

ITIS records citing taxon author "Gray"
 
 Kingdom Animalia
  Aaptos Gray, 1867 -- valid
  Abastor erythrogrammus Gray, 1849 -- invalid
  Ablepharus rueppellii (Gray, 1839) -- valid -- Rueppel's Snake-eyed Skink
  Ablepharus rueppellii rueppellii (Gray, 1839) -- valid
  Abralia Gray, 1849 -- valid
  Abralia (Abralia) Gray, 1849 -- valid
  Abromys Gray, 1868 -- invalid
  Abronia Gray, 1838 -- valid
  Abroscopus schisticeps (J. E. Gray & G. R. Gray, 1847) -- valid -- Black-faced Warbler
  Abroscopus schisticeps schisticeps (J. E. Gray & G. R. Gray, 1847) -- valid
  Acabaria Gray, 1859 -- valid
  Acabaria divaricata Gray, 1859 -- valid
  Acalia Gray, 1840 -- invalid
  Acalia intermedia Gray, 1840 -- invalid
  Acalle Gray, 1867 -- valid
  Acanella Gray, 1870 -- valid
  Acanthaster ellisi (Gray, 1840) -- invalid
  Acanthocardia J. E. Gray, 1851 -- valid
  Acanthochelys Gray, 1873 -- valid -- South American Side-necked Swamp Turtles
  Acanthochitona Gray, 1821 -- valid
  Acanthodactylus erythrurus belli Gray, 1845 -- valid
  Acanthodactylus maculatus (Gray, 1838) -- valid -- Spotted Fringe-fingered Lizard
  Acanthodelphis Gray, 1866 -- invalid
  Acanthodoris Gray, 1850 -- valid
  Acanthogorgia Gray, 1857 -- valid
  Acanthogorgia hirsuta Gray, 1857 -- valid
  Acanthogorgiidae Gray, 1859 -- valid
  Acanthomys Gray, 1867 -- invalid
  Acanthosaura Gray in Hardwicke, 1827 -- valid
  Acanthosaura armata (Gray in Hardwicke, 1827) -- valid -- Armored Pricklenape, Peninsular Horned Tree Lizard
  Acar Gray, 1857 -- valid
  Acarana Gray, 1833 -- invalid
  Acarnus Gray, 1867 -- valid
  Accipiter albogularis G. R. Gray, 1870 -- valid -- Pied Goshawk
  Accipiter albogularis albogularis G. R. Gray, 1870 -- valid
  Accipiter erythrauchen G. R. Gray, 1861 -- valid -- Rufous-necked Sparrowhawk
  Accipiter erythrauchen erythrauchen G. R. Gray, 1861 -- valid
  Accipiter henicogrammus (G. R. Gray, 1861) -- valid -- Moluccan Goshawk
  Accipiter hiogaster griseogularis (G. R. Gray, 1861) -- valid
  Accipiter poliocephalus G. R. Gray, 1858 -- valid -- Grey-headed Goshawk
  Acerodon mackloti floresii (Gray, 1871) -- invalid
  Acerodon macklotii floresii (Gray, 1871) -- valid
  Acipenser sinensis Gray, 1835 -- valid -- Chinese sturgeon, Sagami sturgeon
  Acmaeodera flavomarginata (Gray, 1832) -- valid
  Acodontaster miliaris (Gray, 1847) -- invalid
  Acontiinae Gray, 1839 -- valid
  Acritoscincus duperreyi (Gray, 1838) -- valid -- Bold-striped Cool-skink, Three-lined Skink
  Acritoscincus trilineatus (Gray, 1838) -- valid -- New Holland Skink, South-western Cool-skink
  Acronurus Gronow in Gray, 1854 -- invalid
  Acronurus aegyptius Gronow in Gray, 1854 -- invalid
  Acronurus corniger Gronow in Gray, 1854 -- invalid
  Acronurus fuscus Gronow in Gray, 1854 -- invalid
  Acryllium G. R. Gray, 1840 -- valid
  Acteocina Gray, 1847 -- valid
  Adocia Gray, 1867 -- valid
  Adreus Gray, 1867 -- valid
  Aegithinidae G. R. Gray, 1869 -- valid
  Aegotheles wallacii G. R. Gray, 1859 -- valid -- Wallace's Owlet-Nightjar
  Aegotheles wallacii wallacii G. R. Gray, 1859 -- invalid
  Aepycerotinae Gray, 1872 -- valid
  Aepyprymnus rufescens (Gray, 1837) -- valid -- rufous 'rat'-kangaroo, Rufous Rat-kangaroo
  Aetomylaeus maculatus (Gray, 1834) -- valid
  Afraflacilla gunbar Zabka & Gray, 2002 -- valid
  Afraflacilla milledgei Zabka & Gray, 2002 -- invalid
  Afraflacilla millidgei Zabka & Gray, 2002 -- invalid
  Afroablepharus africanus (Gray, 1845) -- invalid
  Afrotis G. R. Gray, 1855 -- valid
  Agama spinosa Gray, 1831 -- valid -- Gray's Agama, Spiny Agama
  Agariciidae Gray, 1847 -- valid
  Agonum balesi Gray, 1937 -- invalid
  Agoutidae Gray, 1821 -- invalid
  Ahaetulla caudolineata Gray, 1834 -- invalid
  Ailia Gray, 1830 -- valid
  Ailuridae Gray, 1843 -- valid
  Ailurinae Gray, 1843 -- invalid
  Ailuroedus crassirostris melanotis (G. R. Gray, 1858) -- invalid
  Ailuroedus melanotis (G. R. Gray, 1858) -- valid -- Spotted Catbird
  Ailuroedus melanotis melanotis (G. R. Gray, 1858) -- valid
  Aipysurus eydouxii (Gray, 1849) -- valid -- Spine-tailed Seasnake
  Akialoa ellisiana (G. R. Gray, 1860) -- valid -- Greater Akialoa
  Akialoa ellisiana ellisiana (G. R. Gray, 1860) -- invalid
  Alcadia Gray, 1840 -- valid
  Alcedo azurea affinis (G. R. Gray, 1861) -- invalid
  Alcelaphus buselaphus tora Gray, 1873 -- valid -- tora hartebeest
  Alces Gray, 1821 -- valid -- moose, Old World elk
  Alcyone affinis G. R. Gray, 1861 -- invalid
  Alectoris chukar (J. E. Gray, 1830) -- valid -- Chukar, Chukar Partridge, Perdiz chukar
  Alectoris chukar chukar (J. E. Gray, 1830) -- valid
  Alectroenas G. R. Gray, 1840 -- valid
  Alectura lathami J. E. Gray, 1831 -- valid -- Australian Brushturkey
  Alectura lathami lathami J. E. Gray, 1831 -- valid
  Allactaga indica Gray, 1842 -- invalid
  Allobates chalcopis (Kaiser, Coloma and Gray, 1994) -- valid
  Allopatiria ocellifera (Gray, 1847) -- valid
  Alouatta palliata (Gray, 1849) -- valid -- Mantled Howler, Saraguato de manto
  Alouatta palliata palliata (Gray, 1849) -- valid -- Golden-mantled Howler
  Alticola roylei (Gray, 1842) -- valid -- Royle's High Mountain Vole, Royle's Mountain Vole
  Alycaeinae Gray, 1850 -- valid
  Alycaeus Gray, 1850 -- valid
  Alytes australis Gray, 1842 -- invalid
  Amanses Gray, 1835 -- valid
  Amanses microlepidotus Gray, 1859 -- invalid
  Amauropelma Raven, Stumkat & Gray, 2001 -- valid
  Amauropelma torbjorni Raven & Gray, 2001 -- valid
  Amauropelma undara Raven & Gray, 2001 -- valid
  Amazilis G. R. Gray, 1855 -- valid
  Amazona xantholora (G. R. Gray, 1859) -- valid -- Loro yucateco, Yellow-lored Parrot, Yucatan Amazon
  Amblystoma californicum Gray, 1853 -- invalid
  Amblystoma persimile (Gray, 1859) -- invalid
  Amblystoma persimilis (Gray, 1859) -- invalid
  Amblystoma punctulatum Gray, 1850 -- invalid
  Ambyostoma californiense Gray, 1853 -- invalid
  Ambystoma californiense Gray, 1853 -- valid -- California Tiger Salamander
  Ambystoma carolina Gray, 1850 -- invalid
  Ambystoma carolinae Gray, 1850 -- invalid
  Ambystoma frontale (Gray, 1831) -- invalid
  Ambystoma punctulatum Gray, 1850 -- invalid
  Ambystoma tigrinum californiense Gray, 1853 -- invalid
  Ambystomatidae Gray, 1850 -- valid -- Mole Salamanders
  Ameiva dorsalis Gray, 1838 -- invalid
  Ametrida Gray, 1847 -- valid
  Ametrida centurio Gray, 1847 -- valid -- Little White-shouldered Bat
  Amicula Gray, 1847 -- valid
  Ampelioides tschudii (G. R. Gray, 1846) -- valid -- Scaled Fruiteater
  Amphiblestrum Gray, 1848 -- valid
  Amphibolidae Gray, 1840 -- valid
  Amphioxus belcheri Gray, 1847 -- invalid
  Amphisbaena brasiliana (Gray, 1865) -- valid -- Brazilian Worm Lizard
  Amphisbaena plumbea Gray, 1872 -- valid -- Lead Worm Lizard
  Amphisbaena versatilis Gray, 1850 -- invalid
  Amphisbaenidae Gray, 1865 -- valid -- Amphisbaenids, Tropical Worm Lizards
  Amphisbetia bispinosa (Gray, 1843) -- valid
  Amphiumidae Gray, 1825 -- valid -- Amphiumas, Congo Eels
  Ampullariidae Gray, 1824 -- valid
  Anableps lineatus Gronow in Gray, 1854 -- invalid
  Anacanthus Gray, 1830 -- valid
  Anacanthus barbatus Gray, 1830 -- valid -- beardie
  Anadara Gray, 1847 -- valid
  Anadia Gray, 1845 -- valid
  Anadia marmorata (Gray, 1846) -- valid -- Spotted Anadia
  Anadia ocellata Gray, 1845 -- valid -- Ocellated Anadia
  Anaora Gray, 1835 -- valid
  Anaora tentaculata Gray, 1835 -- valid
  Anas aucklandica (G. R. Gray, 1844) -- valid -- Brown Teal
  Anas aucklandica aucklandica (G. R. Gray, 1844) -- invalid
  Anas chlorotis G. R. Gray, 1845 -- valid
  Anatinellidae Gray, 1853 -- valid
  Ancistrocheirus Gray, 1849 -- valid
  Ancistroteuthis Gray, 1849 -- valid
  Andropadus tephrolaemus (G. R. Gray, 1862) -- invalid -- Grey-throated Greenbul, Western Greenbul
  Anguilla bengalensis (Gray, 1831) -- valid
  Anguilla dieffenbachii Gray, 1842 -- valid
  Anilios Gray, 1845 -- valid
  Anilios australis Gray, 1845 -- valid -- Southern Blind Snake, Southern Blindsnake
  Anilios nigrescens Gray, 1845 -- valid -- Blackish Blind Snake
  Anisomorpha Gray, 1835 -- valid
  Anniella Gray, 1852 -- valid -- American legless lizards, California legless lizards, Legless Lizards, North American Legless Lizards
  Anniella pulchra Gray, 1852 -- valid -- California Legless Lizard, Lagartija sin patas californiana, Northern Legless Lizard, Silvery Legless Lizard
  Anniella pulchra pulchra Gray, 1852 -- invalid
  Anodon parishii Gray, 1834 -- invalid
  Anodon penicillatus Gray, 1834 -- invalid
  Anodon porcifer Gray, 1834 -- invalid
  Anodonta adansonii Gray, 1825 -- invalid
  Anolis aeneus Gray, 1840 -- valid -- Bronze Anole
  Anolis grahami Gray, 1845 -- valid -- Graham's Anole
  Anolis grahami grahami Gray, 1845 -- valid
  Anolis lineatopus Gray, 1840 -- valid -- Stripefoot Anole
  Anolis lineatopus lineatopus Gray, 1840 -- valid
  Anolis porcatus Gray, 1840 -- valid -- Cuban Green Anole
  Anolis porcatus porcatus Gray, 1840 -- valid
  Anomalurus derbianus (Gray, 1842) -- valid -- Lord Derby's Flying Squirrel, Lord Derby's Scaly-tailed Squirrel
  Anomalurus fulgens Gray, 1869 -- invalid
  Anostomus salmoneus Gronow in Gray, 1854 -- invalid
  Anota Gray, 1863 -- invalid
  Anoura Gray, 1838 -- valid -- tailless bats
  Anoura geoffroyi Gray, 1838 -- valid -- Geoffroy's Tailless Bat
  Anoura geoffroyi geoffroyi Gray, 1838 -- valid
  Anous minutus melanogenys G. R. Gray, 1846 -- valid
  Antaresia childreni (Gray, 1842) -- valid -- Children's Python
  Antechinus apicalis (Gray, 1842) -- invalid -- dibbler
  Antechinus flavipes leucogaster (Gray, 1841) -- valid
  Anthenea Gray, 1840 -- valid
  Anthenea chinensis Gray, 1840 -- invalid
  Anthenea flavescens (Gray, 1840) -- valid
  Anthenea granulifera Gray, 1847 -- invalid
  Anthenea spinulosa (Gray, 1847) -- invalid
  Anthenea tuberculosa Gray, 1847 -- valid
  Antho Gray, 1867 -- valid
  Antho (Acarnia) Gray, 1867 -- valid
  Antho (Antho) Gray, 1867 -- valid
  Anthornis G. R. Gray, 1840 -- valid
  Anthornis melanocephala G. R. Gray, 1843 -- valid -- Chatham Bellbird, Chatham Island Bellbird, Méliphage des Chatham, Mielero de las Chatham
  Anthornis melanura melanocephala G. R. Gray, 1843 -- invalid
  Anthus novaeseelandiae aucklandicus G. R. Gray, 1862 -- valid
  Antigona listeri J. E. Gray, 1838 -- invalid
  Antilocapra anteflexa Gray, 1855 -- invalid
  Antilocapridae Gray, 1866 -- valid -- pronghorns
  Antilopinae Gray, 1821 -- valid
  Antipathes atlantica Gray, 1857 -- valid -- grey sea fan black coral
  Antipathes furcata Gray, 1857 -- valid
  Antipathes gracilis Gray, 1860 -- valid -- orange sea fan black coral
  Antipathes hirta Gray, 1857 -- valid -- bottle brush bush black coral, bottle brush coral
  Antipathes pedata Gray, 1857 -- valid
  Aonyx horsfieldii Gray, 1843 -- invalid
  Aphaneura rufescens Gray, 1832 -- invalid
  Aphanipathes fruticosa Gray, 1857 -- valid
  Aphrocallistes Gray, 1858 -- valid
  Aphrocallistidae Gray, 1867 -- valid
  Aphroceras Gray, 1858 -- valid
  Aplonis cantoroides (G. R. Gray, 1862) -- valid -- Singing Starling
  Aplonis metallica nitida (G. R. Gray, 1858) -- valid
  Aplonis mysolensis (G. R. Gray, 1862) -- valid -- Moluccan Starling
  Aplonis mysolensis mysolensis (G. R. Gray, 1862) -- valid
  Aplonis striata atronitens G. R. Gray, 1859 -- valid
  Aplopus Gray, 1835 -- invalid
  Apolemichthys arcuatus (Gray, 1831) -- valid -- bandit angelfish
  Aprasia Gray, 1839 -- valid
  Aprasia pulchella Gray, 1839 -- valid
  Aptenodytes forsteri G. R. Gray, 1844 -- valid -- Emperor Penguin
  Apterygia ramcarata Gray, 1835 -- invalid
  Apus affinis (J. E. Gray, 1830) -- valid -- Little Swift
  Apus affinis affinis (J. E. Gray, 1830) -- valid
  Aquila gurneyi G. R. Gray, 1861 -- valid -- Gurney's Eagle
  Aquilonastra burtoni (Gray, 1840) -- valid
  Ara chloroptera G. R. Gray, 1859 -- invalid
  Ara chloropterus G. R. Gray, 1859 -- valid -- Red-and-green Macaw
  Aracana Gray, 1838 -- valid
  Aracana ornata (Gray, 1838) -- valid -- ornate cowfish
  Aratinga wagleri (G. R. Gray, 1845) -- valid -- Scarlet-fronted Parakeet
  Aratinga wagleri wagleri (G. R. Gray, 1845) -- valid
  Arbacia Gray, 1835 -- valid
  Arbaciidae Gray, 1855 -- valid
  Archaius Gray, 1865 -- valid
  Architectonicidae Gray, 1850 -- valid
  Arctocebus Gray, 1863 -- valid -- angwantibos
  Arctocephalus californianus Gray, 1866 -- invalid
  Arctocephalus hookeri Gray, 1844 -- invalid
  Arctocephalus monteriensis Gray, 1859 -- invalid
  Arctocephalus tropicalis (J. E. Gray, 1872) -- valid -- Amsterdam fur seal, Subantarctic Fur Seal
  Arctogalidia trivirgata (Gray, 1832) -- valid -- Small-toothed Palm Civet
  Arctogalidia trivirgata trivirgata (Gray, 1832) -- valid
  Arctonetta G. R. Gray, 1856 -- invalid
  Arctonyx collaris taraiyensis Gray, 1863 -- invalid
  Arctopithecus blainvillii Gray, 1850 -- invalid
  Arctopithecus boliviensis Gray, 1871 -- invalid
  Arctopithecus castaneiceps Gray, 1871 -- invalid
  Arctopithecus flaccidus Gray, 1850 -- invalid
  Arctopithecus flaccidus dysonii Gray, 1869 -- invalid
  Arctopithecus flaccidus smithii Gray, 1869 -- invalid
  Arctopithecus griseus Gray, 1871 -- invalid
  Arctopithecus marmoratus Gray, 1850 -- invalid
  Arctopithecus problematicus Gray, 1850 -- invalid
  Ardea alba modesta J. E. Gray, 1831 -- invalid
  Ardea modesta J. E. Gray, 1831 -- valid
  Ardeotis australis (J. E. Gray, 1829) -- valid -- Australian Bustard
  Argyrodes incursus Gray & Anderson, 1989 -- valid
  Argyrophis Gray, 1845 -- valid
  Ariteus Gray, 1838 -- valid
  Ariteus flavescens (Gray, 1831) -- valid -- Jamaican Fig-eating Bat
  Arizelocichla tephrolaema (G. R. Gray, 1862) -- valid -- Western Greenbul
  Arizelocichla tephrolaema tephrolaema (G. R. Gray, 1862) -- valid
  Aromochelys Gray, 1856 -- invalid
  Aromochelys carinata Gray, 1856 -- invalid
  Aromochelys carinatus Gray, 1856 -- invalid
  Artibeus falcatus Gray, 1839 -- invalid
  Artibeus fimbriatus Gray, 1838 -- valid -- Fringed Fruit-eating Bat
  Arvicola americana Gray, 1842 -- invalid
  Arvicola thricolis Gray, 1863 -- invalid
  Arvicolidae Gray, 1821 -- invalid
  Arvicolinae Gray, 1821 -- valid -- arvicoline rodents
  Asellia Gray, 1838 -- valid
  Asinus burchellii Gray, 1824 -- invalid
  Asinus vulgaris Gray, 1824 -- invalid
  Asmea Gray & Smith, 2008 -- valid
  Asmea akrikensis Gray & Smith, 2008 -- valid
  Asmea capella Gray & Smith, 2008 -- valid
  Asmea hayllari Gray & Smith, 2008 -- valid
  Asmea mullerensis Gray & Smith, 2008 -- valid
  Aspideretes hurum (Gray, 1830) -- invalid -- Indian peacock softshell turtle, peacock softshell turtle
  Aspideretes leithii (Gray, 1872) -- invalid -- Leith's Softshell Turtle
  Aspidochelys Gray, 1860 -- invalid
  Aspidochelys livingstonii Gray, 1860 -- invalid
  Aspilus Gray, 1864 -- invalid
  Astacopsis franklinii (Gray in Eyre, 1845) -- valid
  Astacus bicarinatus Gray in Eyre, 1845 -- invalid
  Astacus franklinii Gray in Eyre, 1845 -- invalid
  Astacus quinquecarinatus Gray in Eyre, 1845 -- invalid
  Astarte arctica (J. E. Gray, 1824) -- valid -- Arctic astarte
  Astarte crenata (J. E. Gray, 1824) -- valid -- crenulate astarte
  Astarte crenata crenata (Gray, 1824) -- valid
  Asteracanthion calamaria (Gray, 1840) -- invalid
  Asterias aster Gray, 1840 -- invalid
  Asterias calamaria Gray, 1840 -- invalid
  Asterias cumingii Gray, 1840 -- invalid
  Asterias echinata Gray, 1840 -- invalid
  Asterias johnstoni Gray in Johnston, 1836 -- invalid
  Asterias katherinae Gray, 1840 -- invalid
  Asterias multiradiata Gray, 1840 -- invalid
  Asterias rustica Gray, 1840 -- invalid
  Asterias wilkinsoni Gray, 1840 -- invalid
  Asteriidae Gray, 1840 -- valid
  Asterina burtoni Gray, 1840 -- invalid
  Asterina coccinea (Gray, 1840) -- invalid
  Asterina granifera (Gray, 1847) -- invalid
  Asterina gunni Gray, 1840 -- invalid
  Asterina ocellifera (Gray, 1847) -- invalid
  Asterinidae Gray, 1840 -- valid -- cushion stars
  Asteriscus coccineus (Gray, 1840) -- invalid
  Asteriscus kraussi (Gray, 1840) -- invalid
  Asterodiscides elegans (Gray, 1847) -- valid
  Asterodiscus Gray, 1847 -- invalid
  Asterodiscus elegans Gray, 1847 -- invalid
  Asterodon miliaris (Gray, 1847) -- invalid
  Astrochelys Gray, 1873 -- valid
  Astrogonium duebeni (Gray, 1847) -- invalid
  Astrogonium inaequale Gray, 1847 -- invalid
  Astrogonium miliare Gray, 1847 -- invalid
  Astrogonium paxillosum Gray, 1847 -- invalid
  Astrogonium pulchellum (Gray, 1840) -- invalid
  Astrogonium tuberculatum Gray, 1847 -- invalid
  Astropecten Gray, 1840 -- valid
  Astropecten (Astropus) Gray, 1840 -- invalid
  Astropecten armatus Gray, 1840 -- valid
  Astropecten armatus armatus Gray, 1840 -- valid
  Astropecten armatus erinaceus Gray, 1840 -- valid
  Astropecten articulatus duplicatus Gray, 1840 -- invalid
  Astropecten aurantiaca Gray, 1840 -- invalid
  Astropecten corniculatus Gray, 1840 -- invalid
  Astropecten dubius Gray, 1840 -- invalid
  Astropecten duplicatus Gray, 1840 -- valid -- two-spined star fish
  Astropecten echinatus Gray, 1840 -- invalid
  Astropecten erinaceus Gray, 1840 -- invalid
  Astropecten gracilis Gray, 1840 -- invalid
  Astropecten longipes Gray, 1840 -- invalid
  Astropecten marginatus Gray, 1840 -- valid
  Astropecten mauritianus Gray, 1840 -- valid
  Astropecten mesodiscus Gray, 1840 -- invalid
  Astropecten pulcher Gray, 1840 -- invalid
  Astropecten regalis Gray, 1840 -- valid
  Astropecten regularis Gray, 1840 -- invalid
  Astropecten stellaris Gray, 1840 -- invalid
  Astropecten stellatus Gray, 1840 -- invalid
  Astropectinidae Gray, 1840 -- valid
  Astropus Gray, 1840 -- invalid
  Astropus longipes (Gray, 1840) -- invalid
  Astrotia stokesii (Gray, 1846) -- invalid
  Asymmetricata ovalis (Hope in Gray, 1831) -- valid
  Asyndesmus lewis (G. R. Gray, 1849) -- invalid
  Atagema Gray, 1850 -- valid
  Ateles albifrons Gray, 1870 -- invalid
  Ateles bartlettii Gray, 1867 -- invalid
  Ateles cucullatus Gray, 1866 -- invalid
  Ateles fusciceps Gray, 1866 -- valid -- Black-headed Spider Monkey, Brown-headed Spider Monkey
  Ateles fusciceps fusciceps Gray, 1866 -- valid -- Brown-headed Spider Monkey
  Ateles geoffroyi frontatus (Gray, 1842) -- valid -- Black-browed Spider Monkey
  Ateles geoffroyi grisescens Gray, 1866 -- valid -- Hooded Spider Monkey
  Ateles geoffroyi ornatus (Gray, 1870) -- valid -- Ornate Spider Monkey
  Ateles geoffroyi vellerosus Gray, 1866 -- valid -- Mexican Spider Monkey
  Ateles hybridus brunneus Gray, 1872 -- invalid -- Brown Spider Monkey
  Atelidae Gray, 1825 -- valid
  Atelinae Gray, 1825 -- valid
  Atelopus peruensis Gray and Cannatella, 1985 -- valid
  Ateuchosaurus Gray, 1845 -- valid
  Ateuchosaurus chinensis Gray, 1845 -- valid -- Chinese Short-limbed Skink
  Athene albifacies G. R. Gray, 1844 -- invalid
  Athene hypogramma G. R. Gray, 1861 -- invalid
  Athene rufostrigata G. R. Gray, 1861 -- invalid
  Atherurus africanus Gray, 1842 -- valid -- African Brush-tailed Porcupine
  Atilax paludinosus robustus (Gray, 1865) -- valid
  Atlanta brunnea J. E. Gray, 1850 -- valid
  Atlanta helicinoidea J. E. Gray, 1850 -- valid
  Atlanta inclinata J. E. Gray, 1850 -- valid
  Atlanta inflata J. E. Gray, 1850 -- valid
  Atlanta lesueurii J. E. Gray, 1850 -- valid
  Atlanta quoyii Gray, 1850 -- valid
  Atrina Gray, 1847 -- valid
  Aturia belcheri Gray, 1849 -- invalid
  Aturia elegans Gray, 1842 -- invalid
  Aturia lapemoides Gray, 1849 -- invalid
  Aturia ornata Gray, 1842 -- invalid
  Austmusia Gray, 1983 -- valid
  Austmusia kioloa Gray, 1983 -- valid
  Austmusia lindi Gray, 1983 -- valid
  Austmusia wilsoni Gray, 1983 -- valid
  Austronomus australis (Gray, 1839) -- valid -- White-striped Free-tailed Bat
  Aviceda subcristata stenozona (G. R. Gray, 1858) -- valid
  Axos Gray, 1867 -- valid
  Azema Gray, 1870 -- invalid
  Babirussina Gray, 1868 -- invalid
  Bachia Gray, 1845 -- valid
  Baiami brockmani Gray, 1981 -- valid
  Baiami glenelgi Gray, 1981 -- valid
  Baiami loftyensis Gray, 1981 -- valid
  Baiami montana Gray, 1981 -- valid
  Baiami stirlingi Gray, 1981 -- valid
  Baiami torbayensis Gray, 1981 -- valid
  Baikia Gray, 1865 -- valid
  Baikia africana Gray, 1865 -- valid -- West African Worm Lizard
  Baikiea Gray, 1869 -- invalid
  Balaena antipodarum Gray, 1843 -- invalid
  Balaena marginata Gray, 1846 -- invalid
  Balaena sieboldii Gray, 1864 -- invalid
  Balaenidae Gray, 1821 -- valid -- bowhead whales, right whales
  Balaenoptera huttoni Gray, 1874 -- invalid
  Balaenoptera sibbaldii (Gray, 1847) -- invalid
  Balaenopteridae Gray, 1864 -- valid -- rorquals
  Balistes amboinensis Gray, 1831 -- invalid
  Balistes equestris Gronow in Gray, 1854 -- invalid
  Balistes granulosus Gronow in Gray, 1854 -- invalid
  Balistes longus Gronow in Gray, 1854 -- invalid
  Balistes nitidus Gronow in Gray, 1854 -- invalid
  Balistes notatus Gronow in Gray, 1854 -- invalid
  Balistes oculatus Gray, 1831 -- invalid
  Balistes porcatus Gronow in Gray, 1854 -- invalid
  Balistes rufus Gronow in Gray, 1854 -- invalid
  Balistes subarmatus Gray, 1831 -- invalid
  Balitora Gray, 1830 -- valid
  Balitora brucei Gray, 1830 -- valid
  Balticina J. E. Gray, 1870 -- valid
  Bandicota Gray, 1873 -- valid -- Bandicoot Rats
  Bandicota bengalensis (Gray, 1835) -- valid -- Lesser Bandicoot Rat
  Bankia Gray, 1842 -- valid
  Bankia carinata (J. E. Gray, 1827) -- valid -- carinate shipworm
  Bankia philippi (Gray, 1851) -- invalid
  Barangia nepalensis Gray, 1865 -- invalid
  Barangia sumatrana Gray, 1865 -- invalid
  Barbala Gray, 1825 -- invalid
  Barbastella Gray, 1821 -- valid
  Barbatia Gray, 1847 -- valid
  Barisia Gray, 1838 -- valid
  Bartlettia Gray, 1870 -- invalid
  Bartlettia pitipii Gray, 1870 -- invalid
  Basilornis celebensis G. R. Gray, 1861 -- valid -- Sulawesi Myna
  Bassiana duperreyi (Gray, 1838) -- invalid
  Bassiana trilineata (Gray, 1838) -- invalid
  Batagur Gray, 1856 -- valid -- river terrapins
  Batagur baska (Gray, 1830) -- valid -- Common River Terrapin, Northern River Terrapin, Ranong River Terrapin, River Terrapin, Tuntong
  Batagur dhongoka (Gray, 1832) -- valid -- Three-striped Roofed Turtle
  Batagur ellioti Gray, 1862 -- invalid
  Batagur kachuga (Gray, 1831) -- valid -- Red-crowned Roofed Turtle
  Batagur picta Gray, 1862 -- invalid
  Batagurella Gray, 1869 -- invalid
  Bataguridae Gray, 1869 -- invalid -- Batagurine Turtles
  Batagurina Gray, 1869 -- invalid
  Bathyarca glacialis (J. E. Gray, 1824) -- valid -- glacial bathyark
  Batrachostomus auritus (J. E. Gray, 1829) -- valid -- Large Frogmouth
  Batrachostomus hodgsoni (G. R. Gray, 1859) -- valid -- Hodgson's Frogmouth
  Batrachostomus hodgsoni hodgsoni (G. R. Gray, 1859) -- valid
  Bedula Gray, 1835 -- invalid
  Bedula hamiltonii Gray, 1835 -- invalid
  Bellatorias major (Gray, 1845) -- valid -- Land Mullet
  Bellia Gray, 1869 -- invalid
  Bellonella Gray, 1862 -- valid
  Belomys pearsonii (Gray, 1842) -- valid -- Hairy-footed Flying Squirrel
  Belomys pearsonii pearsonii (Gray, 1842) -- valid
  Beluga catodon Gray, 1846 -- invalid
  Bengala Gray, 1833 -- valid
  Bengalla Gray & Thompson, 2001 -- valid
  Bengalla bertmaini Gray & Thompson, 2001 -- valid
  Berardius hectori Gray, 1871 -- invalid
  Bettongia Gray, 1837 -- valid -- short-nosed 'rat'-kangaroos
  Bettongia penicillata Gray, 1837 -- valid -- Woylie
  Biemna Gray, 1867 -- valid
  Biemna pennata Gray, 1867 -- valid
  Bipalium lunatum (Gray, 1831) -- invalid
  Bitia Gray, 1842 -- valid
  Bitia hydroides Gray, 1842 -- valid -- Keel-bellied Mud Snake
  Bitis Gray, 1842 -- valid
  Bittium Gray, 1847 -- valid
  Blarina Gray, 1838 -- valid -- American short-tailed shrews
  Blastocerus Gray, 1850 -- invalid
  Boana Gray, 1825 -- valid
  Boidae Gray, 1825 -- valid -- Boas, Boids
  Boiga gokool (Gray, 1835) -- valid -- Arrowback Tree Snake
  Boinae Gray, 1825 -- invalid
  Bolitoglossa bellii (Gray, 1850) -- invalid
  Bolitoglossa platydactyla (Gray, 1831) -- valid -- Salamandra-lengua hongueada pies anchos
  Bolitoglossa salvinii (Gray, 1868) -- valid
  Bolyeria Gray, 1842 -- valid
  Bombinator australis Gray, 1835 -- invalid
  Bombinatoridae Gray, 1825 -- valid
  Borborocoetes dorsalis (Gray, 1841) -- invalid
  Borborocoetes ornatus (Gray, 1842) -- invalid
  Borrala Gray & Smith, 2004 -- valid
  Borrala dorrigo Gray & Smith, 2004 -- valid
  Borrala longipalpis Gray & Smith, 2004 -- valid
  Borrala webbi Gray & Smith, 2004 -- valid
  Borrala yabbra Gray & Smith, 2004 -- valid
  Bostrychia Gray, 1847 -- invalid
  Bostrychia G. R. Gray, 1847 -- valid
  Botia Gray, 1831 -- valid
  Botia almorhae Gray, 1831 -- valid
  Bovidae Gray, 1821 -- valid -- antelopes, bovids, cattle, goats, sheep
  Bovinae Gray, 1821 -- valid
  Brachymeles bicolor (Gray, 1845) -- valid -- Two-colored Short-legged Skink
  Brachyphylla Gray, 1834 -- valid -- Antillean fruit-eating bats
  Brachyphylla cavernarum Gray, 1834 -- valid -- Antillean Fruit-eating Bat
  Brachyphylla cavernarum cavernarum Gray, 1834 -- valid
  Brachyphyllina Gray, 1866 -- valid
  Brachyphyllinae Gray, 1866 -- invalid
  Brachyphyllini Gray, 1866 -- valid -- flower bats, fruit-eating bats
  Bradypodidae Gray, 1821 -- valid -- Three-toed Sloths
  Bradypodion melanocephalum (Gray, 1865) -- valid -- Black-headed Dwarf Chameleon
  Bradypodion ventrale (Gray, 1845) -- valid -- Southern Dwarf Chameleon
  Bradypus affinis Gray, 1850 -- invalid
  Bradypus crinitus Gray, 1850 -- invalid
  Bradypus variegatus boliviensis (Gray, 1871) -- valid
  Branchiostoma belcheri (Gray, 1847) -- valid
  Branchiostoma belcheri belcheri (Gray, 1847) -- valid
  Breviceps gouldii Gray, 1841 -- invalid
  Briareidae Gray, 1859 -- valid
  Brisaster Gray, 1855 -- valid
  Brissidae Gray, 1855 -- valid
  Brissus Gray, 1928 -- valid
  Broderipia Gray, 1847 -- valid
  Bronchocela celebensis Gray, 1845 -- valid -- Sulawesi Bloodsucker
  Bronchocela marmorata Gray, 1845 -- valid -- Marbled Bloodsucker
  Bronia brasiliana Gray, 1865 -- invalid
  Brookesia Gray, 1865 -- valid
  Bubaris Gray, 1867 -- valid
  Buccanodon G. R. Gray, 1855 -- valid
  Buccinum angulosum J. E. Gray, 1839 -- valid -- angular whelk
  Buccinum angulosum angulosum J. E. Gray, 1838 -- valid -- angular whelk, angular whelk
  Buccinum donavani Gray, 1839 -- invalid
  Buccinum polare J. E. Gray, 1839 -- invalid
  Buccinum polaris J. E. Gray, 1839 -- valid -- polar whelk
  Buccinum tenue Gray, 1839 -- invalid
  Bufo carinatus Gray, 1830 -- invalid
  Bufonidae Gray, 1825 -- valid -- bufonidés, Bufonids, crapauds, Toads
  Bugula johnstonae (Gray) -- valid
  Bugulidae Gray, 1848 -- valid
  Bulweria macgillivrayi (G. R. Gray, 1860) -- invalid
  Buteo regalis (G. R. Gray, 1844) -- valid -- Aguililla real, Buse rouilleuse, Ferruginous Hawk
  Butragus Gray, 1872 -- invalid
  Cadea Gray, 1844 -- valid -- Cuban Worm Lizards
  Caecidae Gray, 1815 -- valid
  Caecilia vermiformis Gray, 1850 -- invalid
  Calabaria Gray, 1858 -- valid
  Calabariidae Gray, 1858 -- valid
  Calamaria albiventer (Gray, 1835) -- valid -- White-bellied Reed Snake
  Calamaria annulata Gray in Gray, 1841 -- invalid
  Calantica Gray, 1825 -- valid
  Callagur Gray, 1870 -- invalid -- Painted Terrapins
  Calliaster Gray, 1840 -- valid
  Calliaster childreni Gray, 1840 -- valid
  Callicebus ornatus (Gray, 1866) -- invalid -- Ornate Titi
  Callichelys Gray, 1863 -- invalid
  Calliderma Gray, 1847 -- valid
  Calliderma emma Gray, 1847 -- valid
  Callinia Gray, 1869 -- invalid
  Calliophis Gray, 1835 -- valid
  Calliophis gracilis Gray in Gray and Hardwicke, 1835 -- valid -- Gray Coral Snake, Spotted Coral Snake
  Calliophis gracillis Gray in Gray and Hardwicke, 1835 -- invalid
  Calliophis intestinalis lineata (Gray in Gray and Hardwicke, 1835) -- invalid
  Calliophis intestinalis lineatus (Gray in Gray and Hardwicke, 1835) -- valid
  Callithrix (Cebuella) Gray, 1866 -- invalid
  Callithrix (Harpale) Gray, 1821 -- invalid
  Callithrix (Micoella) Gray, 1870 -- invalid
  Callithrix castaneoventris Gray, 1866 -- invalid
  Callitrichidae Gray, 1821 -- valid -- marmosets, tamarins
  Callitrichinae Gray, 1821 -- invalid
  Callochiton Gray, 1847 -- valid
  Callogorgia Gray, 1858 -- valid
  Callopatiria granifera (Gray, 1847) -- valid
  Calloplax janeirensis (Gray, 1828) -- valid
  Callopora Gray, 1848 -- valid
  Callopsis Gray, 1863 -- invalid
  Callorhinus J. E. Gray, 1859 -- valid -- northern fur seals
  Callosciurus Gray, 1867 -- valid -- Oriental Tree Squirrels
  Callosciurus caniceps (Gray, 1842) -- valid -- Gray-bellied Squirrel
  Callosciurus caniceps caniceps (Gray, 1842) -- valid
  Callosciurus erythraeus atrodorsalis (Gray, 1942) -- valid
  Callosciurus erythraeus castaneoventris (Gray, 1842) -- valid
  Callosciurus erythraeus siamensis (Gray, 1860) -- valid
  Callosciurus inornatus (Gray, 1867) -- valid -- Inornate Squirrel
  Callosciurus prevostii pluto (Gray, 1867) -- valid
  Callosciurus prevostii rufonigra (Gray, 1842) -- valid
  Callosciurus prevostii sarawakensis (Gray, 1867) -- valid
  Callotus Gray, 1863 -- invalid
  Callula Gray, 1831 -- invalid
  Callula pulchra (Gray, 1831) -- invalid
  Callyodon mutabilis Gronow in Gray, 1854 -- invalid -- variable parrotfish
  Callyodon scriptus Gronow in Gray, 1854 -- invalid
  Calocitta G. R. Gray, 1841 -- valid
  Caloenas G. R. Gray, 1840 -- valid -- Nicobar Pigeons
  Calohyla Gray, 1831 -- invalid
  Calohyla pulchra (Gray, 1831) -- invalid
  Caloramphus fuliginosus hayii (J. E. Gray, 1831) -- invalid
  Caloramphus hayii (J. E. Gray, 1831) -- valid -- Sooty Barbet
  Calotes emma Gray, 1845 -- valid -- Forest Garden Lizard
  Calotes emma emma Gray, 1845 -- valid
  Calotes maria Gray, 1845 -- valid -- Khasi Hills Forest Lizard
  Calotes minor (Hardwicke and Gray, 1827) -- valid -- Dwarf Rock Agama, Hardwicke's Bloodsucker
  Calothorax G. R. Gray, 1840 -- valid -- Lucifer Hummingbirds
  Calotriton Gray, 1858 -- valid
  Caloula pulchra (Gray, 1831) -- invalid
  Calumma Gray, 1865 -- valid
  Calumma cucullatum (Gray, 1831) -- valid
  Calumma culcullata (Gray, 1831) -- invalid
  Calyptocephalus Gray in Griffiths, 1832 -- valid
  Calyptocephalus fasciatus Gray in Griffiths, 1832 -- valid
  Calyptrophora Gray, 1866 -- valid
  Calytrophora Gray, 1866 -- invalid
  Cambala Gray, 1832 -- valid
  Camelidae Gray, 1821 -- valid -- camels
  Camelopardina Gray, 1825 -- invalid
  Campephilus G. R. Gray, 1840 -- valid
  Campephilus melanoleucos malherbii G. R. Gray, 1845 -- valid
  Campethera G. R. Gray, 1841 -- valid
  Canala Gray, 1992 -- valid
  Canala poya Gray, 1992 -- valid
  Candoia Gray, 1842 -- valid -- Bevel-nosed Boas, Keel-scaled Boas
  Canis lupus chanco Gray, 1863 -- valid
  Canis procyonoides Gray, 1834 -- invalid
  Cantorella Gray, 1870 -- invalid
  Caouana elongata Gray, 1844 -- invalid
  Caperea Gray, 1864 -- valid -- pygmy right whales
  Caperea marginata (Gray, 1846) -- valid -- Pygmy Right Whale
  Capreolus Gray, 1821 -- valid -- roe deer
  Capricornis swinhoei Gray, 1862 -- valid -- Formosan Serow, Taiwan serow
  Caprimulgus enarratus G. R. Gray, 1871 -- invalid -- Collared Nightjar
  Caprinae Gray, 1821 -- valid
  Caracal Gray, 1843 -- valid
  Caracanthus maculatus (Gray, 1831) -- valid -- spotted croucher
  Caracanthus unipinna (Gray, 1831) -- valid
  Caracanthus unipinnus (Gray, 1831) -- invalid -- coral croucher
  Carettidae Gray, 1825 -- invalid
  Carettinae Gray, 1825 -- valid
  Carinascincus ocellatus (Gray, 1845) -- valid -- Ocellated Cool-skink, Ocellated Skink
  Carlia Gray, 1845 -- valid -- Four-fingered Skinks, Rainbow Skinks
  Carnosa Gray, 1841 -- valid
  Carollia Gray, 1838 -- valid -- short-tailed bats
  Carpococcyx G. R. Gray, 1840 -- valid
  Carpornis G. R. Gray, 1846 -- valid
  Caryophylliidae Gray, 1847 -- invalid
  Casarea Gray, 1842 -- valid
  Castor canadensis leucodontus Gray, 1869 -- invalid
  Catablepas Gray, 1821 -- invalid
  Catopuma badia (Gray, 1874) -- valid -- Bay Cat
  Cebuella Gray, 1866 -- valid -- pygmy marmosets
  Cebus annellatus Gray, 1865 -- invalid
  Cebus capillatus Gray, 1865 -- invalid
  Cebus flavescens Gray, 1865 -- invalid
  Cebus leucocephalus Gray, 1865 -- valid -- Sierra de Perijá White-fronted Capuchin
  Cebus leucogenys Gray, 1866 -- invalid
  Cebus libidinosus pallidus Gray, 1866 -- invalid
  Cebus subcristatus Gray, 1865 -- invalid
  Celestus Gray, 1839 -- valid -- Galliwasps
  Celestus hewardi Gray, 1845 -- valid -- Heward's Galliwasp
  Celestus hewardii Gray, 1845 -- invalid
  Celestus sepsoides (Gray, 1852) -- valid -- Common four-toed Galliwasp, Hispaniolan Four-toed Galliwasp
  Celleporella Gray, 1848 -- valid
  Celleporina Gray, 1848 -- valid
  Centracion Gray, 1831 -- invalid
  Centracion zebra Gray, 1831 -- invalid
  Centrochelys Gray, 1872 -- valid
  Centronycteris Gray, 1838 -- valid -- shaggy bats
  Centropus spilopterus G. R. Gray, 1858 -- valid -- Kai Coucal
  Centurio Gray, 1842 -- valid
  Centurio senex Gray, 1842 -- valid -- Wrinkle-faced Bat
  Centurio senex senex Gray, 1842 -- valid
  Cephalochelys Gray, 1873 -- invalid
  Cephalochelys oceanica Gray, 1873 -- invalid
  Cephalophus dorsalis Gray, 1846 -- valid -- bay duiker, Bay Duiker
  Cephalophus dorsalis dorsalis Gray, 1846 -- valid
  Cephalophus leucogaster Gray, 1873 -- valid -- White-bellied Duiker, white-bellied duiker
  Cephalophus leucogaster leucogaster Gray, 1873 -- valid
  Cephalophus niger Gray, 1846 -- valid -- black duiker, Black Duiker
  Cephalophus nigrifrons Gray, 1871 -- valid -- Black-fronted Duiker, black-fronted duiker
  Cephalophus nigrifrons nigrifrons Gray, 1871 -- valid
  Cephalophus rufilatus Gray, 1846 -- valid -- red-flanked duiker, Red-flanked Duiker
  Cephalophus silvicultor longiceps Gray, 1865 -- valid
  Cephalophus zebra Gray, 1838 -- valid -- striped-backed duiker, zebra duiker, Zebra Duiker
  Cephalorhynchus Gray, 1846 -- valid -- piebald dolphins
  Cephalorhynchus eutropia (Gray, 1846) -- valid -- Black Dolphin, Chilean Dolphin
  Cephalorhynchus heavisidii (Gray, 1828) -- valid -- Haviside's Dolphin, Heaviside's Dolphin
  Ceratophora Gray, 1834 -- valid
  Ceratophora stoddartii Gray, 1834 -- valid -- Mountain Horned Agama, Rhino-horned Lizard
  Ceratorhinus Gray, 1867 -- invalid
  Ceratorhinus blythii Gray, 1873 -- invalid
  Ceratorhinus niger Gray, 1873 -- invalid
  Ceratotherium Gray, 1868 -- valid
  Cerberus acutus Gray, 1849 -- invalid
  Cerberus australis (Gray, 1842) -- valid -- Australian Bockadam
  Cerberus rynchops australis (Gray, 1842) -- invalid
  Cerberus unicolor Gray, 1849 -- invalid
  Cercocebus collaris Gray, 1843 -- invalid
  Cercocebus crossi Gray, 1843 -- invalid
  Cercopithecidae Gray, 1821 -- valid -- Old World monkeys
  Cercopithecinae Gray, 1821 -- valid -- cercopithecines
  Cercopithecoidea Gray, 1821 -- valid
  Cercopithecus burnettii Gray, 1842 -- invalid
  Cercopithecus cano-viridis Gray, 1843 -- invalid
  Cercopithecus canoviridis Gray, 1843 -- invalid
  Cercopithecus cinereo-viridis Gray, 1843 -- invalid
  Cercopithecus cinereoviridis Gray, 1843 -- invalid
  Cercopithecus diana ignita Gray, 1870 -- invalid
  Cercopithecus erythrogaster Gray, 1866 -- valid -- Red-bellied Monkey, White-throated Guenon
  Cercopithecus erythrogaster erythrogaster Gray, 1866 -- valid -- Red-bellied Monkey
  Cercopithecus melanogenys Gray, 1845 -- invalid
  Cercopithecus mona monella Gray, 1870 -- invalid
  Cercopithecus nictitans ludio Gray, 1849 -- invalid -- Red-rumped Putty-nosed Monkey
  Cercopithecus pluto Gray, 1848 -- invalid
  Cercosaura olivacea (Gray, 1845) -- valid -- Olive Tegu
  Ceres Gray, 1856 -- valid
  Cervus elaphus maral Gray, 1850 -- valid
  Ceyx azureus affinis (G. R. Gray, 1861) -- valid
  Ceyx lepidus uropygialis G. R. Gray, 1861 -- valid -- North Moluccan Dwarf-Kingfisher
  Ceyx uropygialis G. R. Gray, 1861 -- invalid -- North Moluccan Dwarf-Kingfisher
  Chaca Gray, 1831 -- valid
  Chaeropithecus Gray, 1870 -- invalid
  Chaetaster maculatus (Gray, 1840) -- invalid
  Chaetaster tessellata (Gray, 1840) -- invalid
  Chaetocercus G. R. Gray, 1855 -- valid
  Chaetodon aculeatus Gronow in Gray, 1854 -- invalid
  Chaetodon albicauda Gronow in Gray, 1854 -- invalid
  Chaetodon guttatus Gronow in Gray, 1854 -- invalid
  Chaetodon lunaris Gronow in Gray, 1854 -- invalid
  Chaetodon mycteryzans Gronow in Gray, 1854 -- invalid
  Chaetodon octolineatus Gronow in Gray, 1854 -- invalid
  Chaetodon ornatus Gray, 1831 -- valid
  Chaetodon parallelus Gronow in Gray, 1854 -- invalid
  Chaetodon punctatolineatus Gronow in Gray, 1854 -- invalid
  Chaetodon quadrimaculatus Gray, 1831 -- valid -- fourspot butterflyfish
  Chaetodon setosus Gronow in Gray, 1854 -- invalid
  Chaetodon vorticosus Gronow in Gray, 1854 -- invalid
  Chaetomys Gray, 1843 -- valid
  Chaetophractus vellerosus (Gray, 1865) -- valid -- Screaming Hairy Armadillo
  Chaetophractus vellerosus vellerosus (Gray, 1865) -- valid
  Chaetopleura janeirensis (J. E. Gray, 1828) -- valid -- West Indian ribbed chiton
  Chaetoptila G. R. Gray, 1869 -- valid -- Kioeas, Kioeas
  Chaetornis G. R. Gray, 1848 -- valid
  Chaetura sabini J. E. Gray, 1829 -- invalid
  Chalcopsitta cardinalis (G. R. Gray, 1849) -- valid -- Cardinal Lory
  Chalcopsitta sintillata rubrifrons G. R. Gray, 1858 -- valid
  Chalinidae Gray, 1867 -- valid
  Chalinolobus gouldii (Gray, 1841) -- valid -- Gould's Wattled Bat
  Chalinolobus morio (Gray, 1841) -- valid -- Chocolate Lobe-lipped Bat, Chocolate Wattled Bat
  Chalinolobus poensis (Gray, 1842) -- invalid
  Chamaeleo dilepis petersii Gray, 1865 -- valid
  Chamaeleo laevigatus Gray, 1863 -- valid -- Smooth Chameleon
  Chamaeleo melleri (Gray, 1865) -- invalid
  Chamaeleo monachus Gray, 1865 -- valid -- Socotra Chameleon
  Chamaeleo oweni Gray, 1831 -- invalid
  Changulia albiventer Gray, 1835 -- invalid
  Charadrius placidus J. E. Gray & G. R. Gray, 1863 -- valid -- Long-billed Plover
  Charina Gray, 1849 -- valid -- Rosy Boas, Rubber Boas
  Charinidae Gray, 1849 -- valid
  Charininae Gray, 1849 -- valid
  Charmosyna pulchella G. R. Gray, 1859 -- valid -- Fairy Lorikeet
  Charmosyna pulchella pulchella G. R. Gray, 1859 -- valid
  Chartella J. E. Gray, 1848 -- valid
  Cheirogaleidae Gray, 1873 -- valid -- dwarf lemurs, mouse lemurs
  Cheirogaleinae Gray, 1873 -- invalid
  Cheirogaleoidea Gray, 1873 -- valid
  Cheirogaleus minor Gray, 1842 -- invalid
  Cheiroleptes australis (Gray, 1842) -- invalid
  Chelidae Gray, 1825 -- valid -- Austro-American Side-necked Turtles, Snake-necked Turtles
  Chelinae Gray, 1825 -- valid
  Chelobasis Gray, 1832 -- valid
  Chelobasis bicolor Gray in Cuvier, 1832 -- valid
  Chelodina colliei Gray, 1856 -- valid -- Southwestern Snake-necked Turtle
  Chelodina expansa Gray, 1857 -- valid -- Broad-shelled Snake-necked Turtle, Giant Snake-necked Turtle
  Chelodina oblonga Gray, 1841 -- valid -- Northern Snake-necked Turtle
  Chelodina sulcata Gray, 1856 -- invalid
  Chelomedusa Gray, 1873 -- invalid
  Chelonemys Gray, 1864 -- invalid
  Cheloniadae Gray, 1825 -- invalid
  Chelonoidis chilensis (Gray, 1870) -- valid -- Chaco Tortoise, Pampas Tortoise
  Chelosania Gray, 1845 -- valid
  Chelosania brunnea Gray, 1945 -- valid -- Chameleon Dragon
  Chelydobatrachus gouldii (Gray, 1841) -- invalid
  Chelydridae Gray, 1831 -- valid -- Snapping Turtles
  Chelymys Gray, 1844 -- invalid
  Chelymys victoriae marmorata Gray, 1872 -- invalid
  Chelymys victoriae sulcata Gray, 1872 -- invalid
  Cherax bicarinatus (Gray in Eyre, 1845) -- valid
  Cherax quinquecarinatus (Gray in Eyre, 1845) -- valid
  Chersina Gray, 1830 -- valid -- Bow-sprited Tortoises
  Chersina angulata pallida Gray, 1831 -- invalid
  Chersinella Gray, 1870 -- invalid
  Chilia melanura (G. R. Gray, 1846) -- valid -- Crag Chilia
  Chilia melanura melanura (G. R. Gray, 1846) -- valid
  Chilonycteris fuliginosa Gray, 1843 -- invalid
  Chilonycteris macleayii Gray, 1839 -- invalid
  Chimarrogale himalayica (Gray, 1842) -- valid -- Himalayan Water Shrew
  Chinemys nigricans (Gray, 1834) -- invalid -- Red-necked Pond Turtle
  Chinemys reevesii (Gray, 1831) -- invalid -- Reeves' turtle, Three-keeled Pond Turtle
  Chioninia Gray, 1845 -- valid
  Chioninia stangeri (Gray, 1845) -- valid
  Chirogaleus smithii Gray, 1842 -- invalid
  Chiroleptes australis (Gray, 1842) -- invalid
  Chirona Gray, 1835 -- valid
  Chiropotes ater Gray, 1870 -- invalid
  Chiroteuthidae Gray, 1849 -- valid
  Chitala ornata (Gray, 1831) -- valid -- clown knifefish
  Chitra Gray, 1844 -- valid -- Narrow-headed Softshell Turtle
  Chitra indica (Gray, 1830) -- valid -- Indian Narrow-headed Softshell Turtle, Narrow-headed Softshell Turtle
  Chitulia inornata Gray, 1849 -- invalid
  Chlamydosaurus Gray, 1825 -- valid
  Chlamydosaurus kingii Gray, 1825 -- valid -- Frilled Lizard
  Chlamydotis macqueenii (J. E. Gray, 1832) -- valid -- Macqueen's Bustard
  Chlidonias albostriatus (G. R. Gray, 1845) -- valid -- Black-fronted Tern
  Chloremys Gray, 1870 -- invalid
  Chlorocebus Gray, 1870 -- valid -- green monkeys, vervet monkeys
  Chlorocebus rufoniger Gray, 1870 -- invalid
  Chlorophoneus multicolor (G. R. Gray, 1845) -- valid
  Chlorophoneus multicolor multicolor (G. R. Gray, 1845) -- valid
  Chloropsis cochinchinensis moluccensis J. E. Gray, 1831 -- valid
  Choloepus didactylus columbianus Gray, 1871 -- invalid
  Chondrillidae Gray, 1872 -- valid
  Chondrodactylus turneri (Gray, 1864) -- valid
  Christinus marmoratus (Gray, 1845) -- valid
  Chrysemys Gray, 1844 -- valid -- Painted Turtles
  Chrysemys picta bellii (Gray, 1830) -- valid -- Western Painted Turtle
  Chrysemys pulchra Gray, 1873 -- invalid
  Chrysochloridae Gray, 1825 -- valid
  Chrysochlorinae Gray, 1825 -- valid
  Chrysococcyx minutillus poecilurus G. R. Gray, 1862 -- valid
  Chrysolophus J. E. Gray, 1834 -- valid
  Chrysomys Gray, 1843 -- invalid
  Chymophila englossoides Gray, 1832 -- invalid
  Ciconia episcopus microscelis G. R. Gray, 1848 -- valid
  Cidaridae Gray, 1825 -- valid
  Cinclocerthia G. R. Gray, 1840 -- valid
  Cinclodes G. R. Gray, 1840 -- valid
  Cipangopaludina chinensis (Gray, 1834) -- valid -- Chinese mysterysnail
  Cipangopaludina chinensis chinensis (Gray, 1834) -- valid
  Cistina Gray, 1840 -- valid
  Cistina columbiae Gray, 1840 -- valid
  Cistoclemmys Gray, 1863 -- invalid
  Cistopus Gray, 1849 -- valid
  Cistuda bealei Gray, 1831 -- invalid
  Cladorhynchus G. R. Gray, 1840 -- valid
  Clathrina Gray, 1867 -- valid
  Clausinella J. E. Gray, 1851 -- valid
  Clio chaptalii J. E. Gray, 1850 -- valid
  Clionidae Gray, 1840 -- valid
  Clotho mauritanica Gray, 1849 -- invalid
  Clymene Gray, 1864 -- invalid
  Clymene normalis Gray, 1866 -- invalid
  Clymene punctata Gray, 1866 -- invalid
  Clypeaster subdepressus (Gray, 1825) -- valid -- sand dollar, sand dollar
  Clypidina Gray, 1847 -- valid
  Cnemaspis boiei (Gray, 1842) -- valid
  Cnemaspis indica (Gray, 1846) -- valid
  Cnemaspis kendallii (Gray, 1845) -- valid
  Coenocorypha G. R. Gray, 1855 -- valid
  Coenocorypha aucklandica (G. R. Gray, 1845) -- valid -- New Zealand Snipe, Subantarctic Snipe
  Coenocorypha aucklandica aucklandica (G. R. Gray, 1845) -- valid
  Coenonympha tullia pseudobrenda Austin and R. Gray, 1998 -- valid
  Coetomys Gray, 1864 -- invalid
  Coggerdonia adelaidensis (Gray, 1841) -- invalid
  Coilia Gray, 1830 -- valid
  Colcarteria Gray, 1992 -- valid
  Colcarteria carrai Gray, 1992 -- valid
  Colcarteria kempseyi Gray, 1992 -- valid
  Colcarteria yessabah Gray, 1992 -- valid
  Coleonyx Gray, 1845 -- valid -- Banded Geckos
  Coleonyx elegans Gray, 1845 -- valid -- Cuija yucateca
  Colinus virginianus cubanensis (G. R. Gray, 1846) -- valid
  Colleeneremia rubella (Gray, 1842) -- invalid
  Collocalia G. R. Gray, 1840 -- valid
  Collocalia esculenta neglecta G. R. Gray, 1866 -- invalid
  Collocalia esculenta spilura G. R. Gray, 1866 -- valid
  Collocalia esculenta uropygialis G. R. Gray, 1866 -- invalid
  Collocalia neglecta G. R. Gray, 1866 -- valid -- Drab Swiftlet
  Collocalia neglecta neglecta G. R. Gray, 1866 -- valid
  Collocalia troglodytes G. R. Gray, 1845 -- valid -- Pygmy Swiftlet
  Collocalia uropygialis G. R. Gray, 1866 -- valid -- Satin Swiftlet
  Collocalia uropygialis uropygialis G. R. Gray, 1866 -- valid
  Colluricincla megarhyncha affinis (G. R. Gray, 1862) -- valid
  Colluricincla megarhyncha aruensis (G. R. Gray, 1858) -- valid
  Colluricincla megarhyncha gouldii (G. R. Gray, 1858) -- valid
  Colluricincla megarhyncha griseata (G. R. Gray, 1858) -- valid
  Colobolus Gray, 1821 -- invalid
  Colobus chrysurus Gray, 1866 -- invalid
  Colobus cristatus Gray, 1866 -- invalid
  Colonia J. E. Gray, 1828 -- valid
  Colophon Gray, 1832 -- valid
  Colophon westwoodi Gray, 1832 -- invalid
  Colophon westwoodii Gray, 1832 -- valid
  Colostethus chalcopis Kaiser, Coloma and Gray, 1994 -- invalid
  Coluber ventromaculatus Gray, 1834 -- invalid
  Columba guinea phaeonota G. R. Gray, 1856 -- valid
  Columba livia gymnocycla G. R. Gray, 1856 -- valid
  Colus sabinii (J. E. Gray, 1824) -- valid
  Colus ventricosus (J. E. Gray, 1839) -- invalid -- ventricose whelk
  Concinnia tenuis (Gray, 1831) -- valid -- Bar-sided Forest-skink, Barred-sided Skink
  Conepatus Gray, 1837 -- valid -- hog-nosed skunks
  Conepatus humboldtii Gray, 1837 -- valid -- Humboldt's Hog-nosed Skunk
  Conepatus humboldtii humboldtii Gray, 1837 -- valid
  Connochetidae Gray, 1872 -- invalid
  Conolophus subcristatus (Gray, 1831) -- valid -- Galapagos Land Iguana
  Conus ximenes Gray, 1839 -- valid
  Coracina boyeri (G. R. Gray, 1846) -- valid -- Boyer's Cuckooshrike
  Coracina boyeri boyeri (G. R. Gray, 1846) -- valid
  Coracina caeruleogrisea (G. R. Gray, 1858) -- valid -- Stout-billed Cuckooshrike
  Coracina caeruleogrisea caeruleogrisea (G. R. Gray, 1858) -- valid
  Coracina schisticeps (G. R. Gray, 1846) -- valid -- Black-tipped Cicadabird
  Coracina schisticeps schisticeps (G. R. Gray, 1846) -- valid
  Coracinus vittatus Gronow in Gray, 1854 -- invalid
  Corallium johnsoni Gray, 1860 -- valid
  Corallus batesii (Gray, 1860) -- valid
  Corallus cookii Gray, 1842 -- valid -- Cook's Tree Boa, Neotropical Tree Boa
  Corallus enydris cookii Gray, 1842 -- invalid
  Corbiculidae Gray, 1847 -- valid
  Corbiculoidea J. E. Gray, 1847 -- valid
  Corbitella Gray, 1867 -- valid
  Corbitellinae Gray, 1872 -- valid
  Cordylosaurus Gray, 1866 -- valid
  Coronopora J. E. Gray, 1848 -- valid
  Corucia Gray, 1855 -- valid
  Corucia zebrata Gray, 1855 -- valid -- Solomon Island Skink
  Corucia zebrata zebrata Gray, 1855 -- valid
  Corvus fuscicapillus G. R. Gray, 1859 -- valid -- Brown-headed Crow
  Corvus fuscicapillus fuscicapillus G. R. Gray, 1859 -- valid
  Coryphaspiza G. R. Gray, 1840 -- valid
  Coryphella Gray, 1850 -- valid
  Corythoichthys fasciatus (Gray, 1830) -- invalid -- banded pipefish
  Coscinasterias aster (Gray, 1840) -- invalid
  Coscinasterias calamaria (Gray, 1840) -- valid
  Coscinasterias echinata (Gray, 1840) -- invalid
  Cossypha isabellae G. R. Gray, 1862 -- valid -- Cameroon Mountain Robin
  Cossypha isabellae isabellae G. R. Gray, 1862 -- valid
  Coturnicops G. R. Gray, 1855 -- valid -- Yellow Rails
  Coua ruficeps G. R. Gray, 1846 -- valid -- Red-capped Coua
  Coua ruficeps ruficeps G. R. Gray, 1846 -- valid
  Couranga Gray & Smith, 2008 -- valid
  Couranga diehappy Gray & Smith, 2008 -- valid
  Couranga kioloa Gray & Smith, 2008 -- valid
  Craspedocephalus elegans Gray, 1849 -- invalid
  Craspedosomatidae Gray, 1843 -- valid
  Crassadoma gigantea (J. E. Gray, 1825) -- valid -- giant rock-scallop
  Crassedoma giganteum (J. E. Gray, 1825) -- invalid -- giant rock scallop
  Crateritheca zelandica (Gray, 1843) -- valid
  Crateromorpha Gray in Carter, 1872 -- valid
  Crateromorpha (Crateromorpha) Gray in Carter, 1872 -- valid
  Crateroscelis murina monacha (G. R. Gray, 1858) -- valid
  Crax daubentoni G. R. Gray, 1867 -- valid -- Yellow-knobbed Curassow
  Crella Gray, 1867 -- valid
  Crella (Crella) Gray, 1867 -- valid
  Crenadactylus ocellatus (Gray, 1845) -- valid
  Cribrilina Gray, 1848 -- valid
  Crithagra burtoni (G. R. Gray, 1862) -- valid -- Thick-billed Seedeater
  Crithagra burtoni burtoni (G. R. Gray, 1862) -- valid
  Crithagra rufobrunnea (G. R. Gray, 1862) -- valid -- Principe Seedeater
  Crithagra rufobrunnea rufobrunnea (G. R. Gray, 1862) -- valid
  Crocodilus bombifrons Gray, 1844 -- invalid
  Crocodilus trigonops Gray, 1844 -- invalid
  Crocodilus vulgaris indicus Gray, 1831 -- invalid
  Cruziohyla sylviae Gray, 2018 -- valid
  Cryptoblepharus buchananii (Gray, 1838) -- valid -- Buchanan's Snake-eyed Skink
  Cryptochelys acuta (Gray, 1831) -- invalid
  Cryptomys Gray, 1864 -- valid
  Cryptoproctinae Gray, 1865 -- invalid
  Ctenoconcha Gray, 1840 -- invalid
  Ctenodactylus Gray, 1830 -- valid -- Common Gundis
  Ctenodactylus massonii Gray, 1830 -- invalid
  Ctenodiscus corniculatus (Gray, 1840) -- invalid
  Ctenophorus adelaidensis (Gray, 1841) -- valid -- Western Heath Dragon
  Ctenophorus cristatus (Gray, 1841) -- valid -- Crested Bicycle-dragon, Crested Dragon
  Ctenophorus maculatus (Gray, 1831) -- valid -- Spotted Dragon, Spotted Sand-dragon
  Ctenophorus maculatus maculatus (Gray, 1831) -- valid
  Ctenophorus ornatus (Gray, 1845) -- valid -- Ornate Crevice-dragon, Ornate Dragon
  Ctenophorus reticulatus (Gray, 1845) -- valid -- Western Netted Dragon, Western Netted Ground-dragon
  Ctenosaura quinquecarinata (Gray, 1842) -- valid -- Five-keeled Spiny-tailed Iguana, Garrobo oaxaqueño, Oaxacan Spinytail Iguana
  Ctenosaura similis (Gray, 1831) -- valid -- Black Iguana, Black Spiny-tailed Iguana, Common Spiny-tailed Iguana, Iguana-espinosa rayada
  Ctenosaura similis similis (Gray, 1831) -- valid -- Common Spiny-tailed Iguana
  Ctenotus australis (Gray, 1838) -- valid -- Western Limestone Ctenotus
  Ctenotus essingtonii (Gray, 1842) -- valid -- Lowlands Plain-backed Ctenotus
  Ctenotus inornatus (Gray, 1845) -- valid -- Bar-shouldered Ctenotus
  Cubina grandis Gray, 1856 -- invalid
  Cuchoa Gray, 1870 -- invalid
  Cucumerunio novaehollandiae (Gray, 1834) -- valid
  Culcita pentangularis Gray, 1847 -- invalid
  Cuniculus fodiens Gray, 1867 -- invalid
  Cuora Gray, 1856 -- valid -- Asian box turtles
  Cuora flavomarginata (Gray, 1863) -- valid -- Yellow-margined Box Turtle
  Cuora flavomarginata flavomarginata (Gray, 1863) -- valid -- Yellow-margined Box Turtle
  Cuora mouhotii (Gray, 1862) -- valid -- Keeled Box Turtle
  Cuora mouhotii mouhotii (Gray, 1862) -- valid
  Cuvieriadae Gray, 1842 -- invalid
  Cuvieridae Gray, 1840 -- invalid
  Cuvierius Gray, 1866 -- invalid
  Cyamon Gray, 1867 -- valid
  Cyanolyca armillata (G. R. Gray, 1845) -- valid -- Black-collared Jay
  Cyanolyca armillata armillata (G. R. Gray, 1845) -- valid
  Cyanoramphus cookii (G. R. Gray, 1859) -- valid -- Norfolk Parakeet
  Cyanoramphus novaezelandiae cookii (G. R. Gray, 1859) -- invalid -- Norfolk Island Parakeet
  Cyclanorbis Gray, 1854 -- valid -- Sub-Saharan flapshell turtles
  Cyclanorbis elegans (Gray, 1869) -- valid -- Nubian Flapshell Turtle
  Cyclanorbis petersii Gray, 1854 -- invalid
  Cyclanosteus Gray, 1856 -- invalid
  Cyclanosteus senegalensis callosa Gray, 1865 -- invalid
  Cyclanosteus senegalensis equilifera Gray, 1865 -- invalid
  Cyclanosteus senegalensis normalis Gray, 1865 -- invalid
  Cyclemys bellii Gray, 1863 -- invalid
  Cyclemys dentata (Gray, 1831) -- valid -- Asian Leaf Turtle
  Cyclemys mouhotii Gray, 1862 -- invalid
  Cyclemys oldhamii Gray, 1863 -- valid -- Southeast Asian Leaf Turtle
  Cyclemys ovata Gray, 1863 -- invalid
  Cyclodomorphus gerrardii (Gray, 1845) -- valid -- Pink-Tongued Lizard, Pink-tongued Skink
  Cyclopes Gray, 1821 -- valid -- pygmy anteaters
  Cyclopes didactylus dorsalis (Gray, 1865) -- invalid
  Cyclopes dorsalis (Gray, 1865) -- valid
  Cyclophoridae Gray, 1847 -- valid
  Cyclorana australis (Gray, 1842) -- invalid
  Cyclothurus dorsalis Gray, 1865 -- invalid
  Cyclura collei Gray, 1845 -- valid -- Jamaica Iguana, Jamaican Iguana, Jamaican Rock Iguana
  Cyclura nubila (Gray, 1831) -- valid -- Cayman Islands Ground Iguana, Clouded Rock Iguana, Cuban Ground Iguana, Cuban Iguana
  Cyclura nubila nubila (Gray, 1831) -- valid -- Cayman Islands Ground Iguana, Cuban Ground Iguana, Cuban Iguana, Cuban Rock Iguana
  Cycria Leach in Gray, 1849 -- invalid
  Cymatodera hopei Gray in Griffith, 1832 -- valid
  Cymbilaimus G. R. Gray, 1840 -- valid
  Cymbuliidae Gray, 1840 -- valid
  Cynisca Gray, 1844 -- valid
  Cynocebus Gray, 1870 -- invalid
  Cynogale Gray, 1837 -- valid
  Cynogale bennettii Gray, 1837 -- valid -- Otter Civet
  Cynogale bennettii bennettii Gray, 1837 -- valid
  Cynoglossus abbreviatus (Gray, 1834) -- valid -- smallscaled flatfish, tonguesole
  Cynops chinensis Gray, 1859 -- invalid
  Cynopterus albiventer Gray, 1863 -- invalid
  Cynopterus brachyotis ceylonensis Gray, 1871 -- valid
  Cynopterus horsfieldi Gray, 1843 -- invalid -- Horsfield's fruit bat
  Cynopterus horsfieldii Gray, 1843 -- valid -- Horsfield's Fruit Bat, Horsfield's Short-nosed Fruit Bat
  Cynopterus horsfieldii horsfieldii Gray, 1843 -- valid
  Cynopterus marginatus ceylonensis Gray, 1871 -- invalid
  Cynopterus marginatus nigrescens Gray, 1870 -- invalid
  Cypraea albuginosa Gray, 1825 -- valid
  Cypraea bicallosa Gray, 1832 -- invalid
  Cypraea mus tuberculata Gray, 1828 -- valid
  Cypraea nigropunctata Gray, 1828 -- valid
  Cypselus affinis J. E. Gray, 1830 -- invalid
  Cypselus balasiensis J. E. Gray, 1829 -- invalid
  Cypsiurus balasiensis (J. E. Gray, 1829) -- valid -- Asian Palm Swift
  Cypsiurus balasiensis balasiensis (J. E. Gray, 1829) -- valid
  Cyrtodactylus Gray, 1827 -- valid -- Curve-toed Geckos
  Cyrtodactylus pulchellus Gray, 1827 -- valid
  Cystignathus dorsalis Gray, 1841 -- invalid
  Daboia Gray, 1842 -- valid
  Daboia mauritanica (Gray, 1849) -- valid -- Moorish Viper
  Daboia xanthina Gray, 1849 -- invalid
  Dacelo tyro G. R. Gray, 1858 -- valid -- Cucaburra escamosa, Martin-chasseur pailleté, Spangled Kookaburra
  Dacelo tyro tyro G. R. Gray, 1858 -- valid
  Dactylocalycidae Gray, 1867 -- valid
  Dactylocnemis pacificus (Gray, 1842) -- valid
  Dactylopsila Gray, 1858 -- valid
  Dactylopsila trivirgata Gray, 1858 -- valid -- Striped Possum
  Dactylopsila trivirgata trivirgata Gray, 1858 -- valid
  Dactylosaster Gray, 1840 -- valid
  Dactylosaster gracilis Gray, 1840 -- invalid
  Dalophia Gray, 1865 -- valid
  Dalophia welwitschii Gray, 1865 -- invalid
  Damalidae Gray, 1872 -- invalid
  Damalis Gray, 1872 -- invalid
  Damonia crassiceps Gray, 1870 -- invalid
  Damonia oblonga Gray, 1871 -- invalid
  Damonia unicolor Gray, 1873 -- invalid
  Dasia Gray, 1839 -- valid
  Dasia grisea (Gray, 1845) -- valid -- Big Tree Skink, Gray Dasia, Gray Tree Skink
  Dasia olivacea Gray, 1839 -- valid -- Olive Dasia, Olive Tree Skink
  Dasyatis gerrardi (Gray, 1851) -- invalid
  Dasypodidae Gray, 1821 -- valid -- Armadillos
  Dasypodinae Gray, 1821 -- valid -- armadillos
  Dasyprocta leporina albida Gray, 1842 -- valid
  Dasyprocta punctata Gray, 1842 -- valid -- Central American Agouti, Guaqueque centroamericano
  Dasyprocta punctata punctata Gray, 1842 -- valid
  Dasyproctinae Gray, 1825 -- invalid
  Daubentoniidae Gray, 1863 -- valid -- Aye-aye
  Daunus Gray, 1821 -- invalid
  Delma Gray, 1831 -- valid
  Delma fraseri Gray, 1831 -- valid
  Delphinapterus catodon (Gray, 1846) -- invalid
  Delphinidae Gray, 1821 -- valid -- dolphins, killer whales, marine dolphins, pilot whales
  Delphinus acutus Gray, 1828 -- invalid
  Delphinus albirostris Gray, 1846 -- invalid
  Delphinus alope Gray, 1846 -- invalid
  Delphinus capensis Gray, 1828 -- invalid -- Long-beaked Common Dolphin, long-beaked saddle-backed dolphin, long-beaked saddleback dolphin
  Delphinus capensis capensis Gray, 1828 -- invalid -- long-beaked common dolphin
  Delphinus clymene Gray, 1850 -- invalid
  Delphinus compressus Gray, 1843 -- invalid
  Delphinus doris Gray, 1846 -- invalid
  Delphinus euphrosyne Gray, 1846 -- invalid
  Delphinus eutropia Gray, 1846 -- invalid
  Delphinus heavisidii Gray, 1828 -- invalid
  Delphinus intermedius Gray, 1827 -- invalid
  Delphinus janira Gray, 1846 -- invalid
  Delphinus longirostris Gray, 1828 -- invalid
  Delphinus major Gray, 1866 -- invalid
  Delphinus microps Gray, 1846 -- invalid
  Delphinus obscurus Gray, 1828 -- invalid
  Delphinus styx Gray, 1846 -- invalid
  Demansia olivacea (Gray, 1842) -- valid -- Marble-headed Whip Snake, Olive Whipsnake
  Demansia psammophis reticulata (Gray, 1842) -- invalid
  Demansia reticulata (Gray, 1842) -- valid -- Yellow-faced Whip Snake, Yellow-faced Whipsnake
  Demansia reticulata reticulata (Gray, 1842) -- invalid
  Dendrelaphis caudolineatus (Gray, 1834) -- valid -- Gray Bronzeback, Striped Bronzeback
  Dendrelaphis punctulatus (Gray, 1826) -- valid -- Common Bronzeback, Common Tree Snake, Green Tree Snake
  Dendrocincla G. R. Gray, 1840 -- valid
  Dendrogale Gray, 1848 -- valid -- Smooth-tailed Tree Shrews
  Dendrohyrax Gray, 1868 -- valid -- Tree Hyraxes
  Dendroica G. R. Gray, 1842 -- invalid -- Northern Warblers
  Dendronotidae Gray, 1857 -- valid
  Dendrophylliidae Gray, 1847 -- valid
  Dercitus Gray, 1867 -- valid
  Dermatemydidae Gray, 1870 -- valid -- River Turtles
  Dermatemys Gray, 1847 -- valid -- Central American River Turtles
  Dermatemys mawii Gray, 1847 -- valid -- Central American River Turtle, Tortuga-riverina centroamericana
  Dermatemys salvinii Gray, 1870 -- invalid
  Desmacidonidae Gray, 1872 -- invalid
  Desmognathinae Gray, 1850 -- invalid -- Desmognathine Salamanders
  Detracia Gray In Turton, 1840 -- valid
  Diacria Gray, 1847 -- valid
  Diadema J. E. Gray, 1825 -- valid
  Diadematidae Gray, 1855 -- valid
  Diaphanes marginellus (Hope in Gray, 1831) -- valid
  Diapheromera Gray, 1835 -- valid
  Dicaeum hirundinaceum ignicolle G. R. Gray, 1858 -- valid
  Dicaeum schistaceiceps G. R. Gray, 1861 -- valid
  Diceros Gray, 1821 -- valid
  Diclidurini Gray, 1866 -- valid -- New World sheath-tailed bats
  Dicrurus bracteatus amboinensis G. R. Gray, 1861 -- valid
  Dicrurus bracteatus atrocaeruleus G. R. Gray, 1861 -- valid
  Dicrurus densus megalornis G. R. Gray, 1858 -- valid
  Didelphidae Gray, 1821 -- valid -- American opossums, opossoms
  Didelphinae Gray, 1821 -- valid
  Diemictylus sinensis (Gray, 1859) -- invalid
  Diodora J. E. Gray, 1821 -- valid
  Diomedeidae G. R. Gray, 1840 -- valid -- albatros, Albatrosses
  Diplodactylus Gray, 1832 -- valid
  Diplodactylus ornatus Gray, 1845 -- valid
  Diplodactylus vittatus Gray, 1832 -- valid
  Diplodon chilensis (Gray, 1828) -- valid
  Diplodontias miliaris (Gray, 1847) -- valid
  Diplodontias paxillosus (Gray, 1847) -- valid
  Diploglossus fasciatus (Gray, 1831) -- valid -- Banded Galliwasp
  Diploglossus microlepis (Gray in Griffith, 1831) -- valid -- Small-lipped Galliwasp
  Diplopterus pulcher Gray, 1830 -- invalid
  Dipodomys Gray, 1841 -- valid -- Kangaroo Rats
  Dipodomys phillipsii Gray, 1841 -- valid -- Phillips' Kangaroo Rat, Phillips's Kangaroo Rat
  Dipodomys phillipsii phillipsii Gray, 1841 -- valid
  Diporiphora Gray, 1842 -- valid
  Diporiphora bennettii (Gray, 1845) -- valid -- Robust Two-line Dragon
  Diporiphora bilineata Gray, 1842 -- valid -- Northern Two-line Dragon, Two-lined Dragon
  Dipsas gokool Gray, 1835 -- invalid
  Dipsas rubescens Gray, 1835 -- invalid
  Dipsidae Gray, 1821 -- invalid
  Dipsochelys dussumieri (Gray, 1831) -- invalid
  Dipsochelys dussumieri dussumieri (Gray, 1831) -- invalid
  Discinidae Gray, 1840 -- valid
  Discoglossus ornatus Gray, 1842 -- invalid
  Distichopora coccinea Gray, 1860 -- valid
  Diversibipalium lunatum (Gray, 1831) -- valid
  Dogania Gray, 1844 -- valid -- Malayan Softshell Turtles
  Dogania guentheri Gray, 1862 -- invalid
  Dolabrifera Gray, 1847 -- valid
  Dolichodon Gray, 1866 -- invalid
  Dolichodon traversii Gray, 1874 -- invalid
  Dongoka Gray, 1869 -- invalid
  Dopasia Gray, 1853 -- valid
  Dopasia gracilis (Gray, 1845) -- valid -- Asian Glass Lizard, Burmese Glass Lizard, Indian Glass Snake
  Dorcas Gray, 1821 -- invalid
  Dorigona Gray, 1866 -- invalid
  Dorigona reevesi Gray, 1866 -- invalid
  Doropygus curvatus Gray, 1938 -- valid
  Dosilia Gray, 1867 -- valid
  Dosima Gray, 1825 -- valid
  Dotidae Gray, 1853 -- valid
  Draco abbreviatus Hardwicke and Gray, 1827 -- valid -- Singapore Flying Dragon
  Draco haematopogon Gray, 1831 -- valid -- Red-barbed Flying Dragon
  Draco maculatus (Gray, 1825) -- valid -- Spotted Flying Dragon
  Draco maculatus maculatus (Gray, 1845) -- valid
  Draco ornatus (Gray, 1845) -- valid -- White-spotted Flying Lizard
  Draco quinquefasciatus Hardwicke and Gray, 1827 -- valid -- Five-lined Flying Dragon
  Dreissenidae Gray, 1840 -- valid
  Dreissenoidea Gray, 1840 -- valid
  Drillia Gray, 1838 -- valid
  Drulia Gray, 1867 -- valid
  Dryomantis bicolor (Gray, 1842) -- invalid
  Dryophiops rubescens (Gray, 1835) -- valid -- Brown Whip Snake, Red Whip Snake
  Dryopsophus australis (Gray, 1842) -- invalid
  Dryoscopus cubla affinis (G. R. Gray, 1837) -- valid
  Dryoscopus sabini (J. E. Gray, 1831) -- valid -- Sabine's Puffback
  Dryoscopus sabini sabini (J. E. Gray, 1831) -- valid
  Ducula bicolor spilorrhoa (G. R. Gray, 1858) -- invalid
  Ducula brenchleyi (G. R. Gray, 1870) -- valid -- Chestnut-bellied Imperial Pigeon
  Ducula goliath (G. R. Gray, 1859) -- valid -- Goliath Imperial Pigeon
  Ducula poliocephala (G. R. Gray, 1844) -- valid -- Pink-bellied Imperial Pigeon
  Ducula spilorrhoa (G. R. Gray, 1858) -- valid -- Torresian Imperial Pigeon
  Dugongidae Gray, 1821 -- valid -- dugongs, sea cows
  Dugonginae Gray, 1821 -- valid
  Dysideidae Gray, 1867 -- valid
  Echimyidae Gray, 1825 -- valid
  Echimyinae Gray, 1825 -- valid
  Echinanthus subdepressus Gray, 1825 -- invalid
  Echinarachnius Gray, 1825 -- valid
  Echinaster (Othilia) Gray, 1840 -- valid
  Echinaster aculeata (Gray, 1840) -- valid
  Echinaster ellisi Gray, 1840 -- invalid
  Echinaster luzonicus (Gray, 1840) -- valid -- Luzon seastar
  Echinaster purpureus (Gray, 1840) -- valid
  Echinidae Gray, 1825 -- valid
  Echinolampadidae Gray, 1851 -- valid
  Echinometra Gray, 1825 -- valid
  Echinometridae Gray, 1825 -- valid
  Echinoprocta Gray, 1865 -- valid
  Echinoprocta rufescens Gray, 1865 -- valid -- Stump-tailed Porcupine
  Echiothrix Gray, 1867 -- valid
  Echiothrix leucura Gray, 1867 -- valid -- Northern Sulawesi Echiothrix
  Echyridella aucklandica (Gray, 1843) -- valid
  Echyridella menziesii (Gray, 1843) -- valid
  Eclectus roratus aruensis G. R. Gray, 1858 -- valid
  Egernia Gray, 1838 -- valid
  Egernia cunninghami (Gray, 1832) -- valid -- Cunningham's Skink, Cunningham's Spiny-tailed Skink
  Egernia kingii (Gray, 1838) -- valid -- King's Skink
  Egernia napoleonis (Gray, 1838) -- valid -- South-western Crevice Skink
  Egernia stokesii (Gray, 1845) -- valid -- Gidgee Skink, Gidgee Spiny-tailed Skink, Stoke's Skink
  Egernia stokesii stokesii (Gray, 1845) -- valid
  Egretta sacra albolineata (G. R. Gray, 1859) -- valid
  Elaps dorsalis Gray and Hardwicke, 1835 -- invalid
  Elaps gouldii Gray, 1841 -- invalid
  Elaps ornatus Gray, 1842 -- invalid
  Electra Gray, 1868 -- invalid
  Eleothreptus G. R. Gray, 1840 -- valid
  Elephantidae Gray, 1821 -- valid
  Elephantopus Gray, 1874 -- invalid
  Eleutherura infumata Gray, 1870 -- invalid
  Eleutherura unicolor Gray, 1870 -- invalid
  Elgaria Gray, 1838 -- valid -- Western Alligator Lizards
  Elgaria kingii Gray, 1838 -- valid -- Arizona Alligator Lizard, Madrean Alligator Lizard
  Elgaria kingii kingii Gray, 1838 -- valid -- Madrean Alligator Lizard
  Elleguna Gray & Smith, 2008 -- valid
  Elleguna major Gray & Smith, 2008 -- valid
  Elleguna minor Gray & Smith, 2008 -- valid
  Ellisella Gray, 1858 -- valid
  Ellisellidae Gray, 1859 -- valid
  Elminius plicatus Gray, 1854 -- valid
  Elseya Gray, 1867 -- valid -- Australian Snapping Turtles
  Elseya dentata (Gray, 1863) -- valid -- northern Australian snapping turtle, Northern Snapping Turtle
  Elseya intermedia Gray, 1872 -- invalid
  Elseya latisternum Gray, 1867 -- invalid -- Serrated Snapping Turtle
  Emarginula sicula J. E. Gray, 1825 -- valid -- dagger emarginula
  Emberiza lathami J. E. Gray, 1831 -- valid -- Crested Bunting
  Emia Gray, 1870 -- invalid
  Emma Gray, 1843 -- valid
  Emma crystallina Gray, 1843 -- valid
  Emmenia Gray, 1870 -- invalid
  Emoia Gray, 1845 -- valid -- Emoias
  Emyda Gray, 1830 -- invalid
  Emyda fuscomaculata Gray, 1873 -- invalid
  Emydoidea Gray, 1870 -- valid -- Blanding's Turtles
  Emydura australis (Gray, 1841) -- invalid -- Australian Big-headed Turtle
  Emydura krefftii (Gray, 1871) -- invalid -- Krefft's River Turtle
  Emydura macquarii (Gray, 1830) -- valid -- Eastern Short-necked Turtle, Southern River Turtle
  Emydura macquarii krefftii (Gray, 1871) -- valid -- Krefft's River Turtle
  Emydura macquarii macquarii (Gray, 1830) -- valid -- Macquarie River Turtle
  Emydura macquarrii (Gray, 1830) -- invalid -- Murray River Turtle
  Emydura victoriae (Gray, 1842) -- valid -- Northern Red-faced Turtle, Victoria Short-necked Turtle
  Emyoides Gray, 1844 -- invalid
  Emys aspera Gray, 1830 -- invalid
  Emys bellii Gray, 1830 -- invalid
  Emys bennettii Gray, 1844 -- invalid
  Emys caspica arabica Gray, 1870 -- invalid
  Emys concentrica livida Gray, 1831 -- invalid
  Emys concentrica polita Gray, 1830 -- invalid
  Emys flavipes Gray, 1869 -- invalid
  Emys fraseri Gray, 1869 -- invalid
  Emys fuliginosus Gray, 1860 -- invalid
  Emys guttata Gray, 1831 -- invalid
  Emys holbrookii Gray, 1844 -- invalid
  Emys kinosternoides Gray, 1830 -- invalid
  Emys kuhlii Gray, 1831 -- invalid
  Emys laniaria Gray, 1869 -- invalid
  Emys laticeps Gray, 1854 -- invalid
  Emys lesueurii Gray, 1830 -- invalid
  Emys lineata Gray, 1830 -- invalid
  Emys macrocephalus Gray, 1844 -- invalid
  Emys occipitatis Gray in Griffith and Pidgeon, 1830 -- invalid
  Emys olivacea Gray, 1856 -- invalid
  Emys pannonica Gray, 1870 -- invalid
  Emys pseudogeographica Gray, 1831 -- invalid
  Emys pulcherrimus Gray, 1856 -- invalid
  Emys reevesii Gray, 1831 -- invalid
  Emys rivulata Gray, 1844 -- invalid
  Emys rugosa livida Gray, 1831 -- invalid
  Emys sanguinolenta Gray, 1856 -- invalid
  Emys sebae Gray, 1831 -- invalid
  Emys speciosa levigata Gray, 1831 -- invalid
  Emys spinosa Gray, 1830 -- invalid
  Emys tecta Gray, 1830 -- invalid
  Emys tectum Gray, 1830 -- invalid
  Emys tristrami Gray, 1869 -- invalid
  Emys ventricosa Gray, 1856 -- invalid
  Emys venusta Gray, 1856 -- invalid
  Emys vermiculata Gray, 1844 -- invalid
  Emys vittata Gray, 1830 -- invalid
  Emys vulgaris Gray, 1830 -- invalid
  Endeca Gray, 1840 -- invalid
  Engina Gray, 1839 -- valid
  Enhydrina Gray, 1849 -- invalid
  Enhydris bennetti (Gray, 1842) -- invalid
  Enhydris bennettii (Gray, 1842) -- invalid
  Enhydris chinensis (Gray, 1842) -- invalid
  Enhydris indica (Gray, 1842) -- invalid
  Enhydris punctata (Gray, 1849) -- invalid
  Enicognathus G. R. Gray, 1840 -- valid
  Enoplochiton Gray, 1847 -- valid
  Ensatina Gray, 1850 -- valid -- Ensatinas
  Ensatina eschscholtzii Gray, 1850 -- valid -- Ensatina, Salamandra ensantina
  Ensatina eschscholtzii eschscholtzii Gray, 1850 -- invalid -- Monterey Ensatina
  Enyaliosaurus Gray, 1845 -- invalid
  Enyaliosaurus quinquecarinatus (Gray, 1842) -- invalid -- Garrobo oaxaqueño
  Eoglaucomys fimbriatus (Gray, 1837) -- valid -- Kashmir Flying Squirrel
  Eoglaucomys fimbriatus fimbriatus (Gray, 1837) -- valid
  Ephialtes leucospila G. R. Gray, 1861 -- invalid
  Epicrates cenchria maurus Gray, 1849 -- invalid -- Rainbow Boa
  Epicrates maurus Gray, 1849 -- valid -- Rainbow Boa
  Epicrates maurus maurus Gray, 1849 -- invalid
  Epictia Gray, 1845 -- valid
  Epimecinus alkirna Gray, 1973 -- valid
  Epizoanthidae Gray, 1867 -- valid
  Epizoanthus Gray, 1867 -- valid
  Epomophorini Gray, 1866 -- valid
  Epomophorus angolensis Gray, 1870 -- valid -- Angolan Epauletted Fruit Bat
  Epomophorus macrocephalus angolensis Gray, 1870 -- invalid
  Epomops Gray, 1870 -- valid
  Eptesicus pumilus (Gray, 1841) -- invalid -- eastern forest bat
  Equidae Gray, 1821 -- valid -- Asses, Horses, Zebras
  Equus (Asinus) Gray, 1824 -- valid -- Asses
  Equus burchelli (Gray, 1824) -- invalid
  Equus burchelli burchelli (Gray, 1824) -- invalid
  Equus burchellii (Gray, 1824) -- invalid -- Burchell's Zebra, Plains Zebra
  Equus burchellii burchellii (Gray, 1824) -- invalid -- Burchell's Zebra
  Equus quagga burchellii (Gray, 1824) -- valid -- Bontequagga, Burchell's Zebra, Damara zebra, Zululand zebra
  Erato maugeriae Gray, 1823 -- valid -- green erato
  Eremiascincus richardsonii (Gray, 1845) -- valid -- Broad-banded Sand-swimmer, Keeled Skink, Richardson's Skink
  Eremonia Gray, 1873 -- invalid
  Errina Gray, 1835 -- valid
  Errina antarctica (Gray, 1872) -- valid
  Errina fissurata Gray, 1872 -- valid
  Erylus Gray, 1867 -- valid
  Eryma Gray, 1870 -- invalid
  Erythrocercus livingstonei G. R. Gray, 1870 -- valid -- Livingstone's Flycatcher
  Erythrocercus livingstonei livingstonei G. R. Gray, 1870 -- valid
  Eryx elegans (Gray, 1849) -- valid
  Escharella Gray, 1848 -- valid
  Eschrichtius Gray, 1864 -- valid -- gray whales, grey whales
  Ethra marginata (Gray in Griffiths, 1832) -- valid
  Eubalaena Gray, 1864 -- valid -- right whales
  Eubalaena sieboldii (Gray, 1864) -- invalid
  Eublepharis Gray, 1827 -- valid
  Eublepharis hardwickii Gray, 1827 -- valid
  Eubucco richardsoni (G. R. Gray, 1846) -- valid -- Lemon-throated Barbet
  Eubucco richardsoni richardsoni (G. R. Gray, 1846) -- valid
  Eucervus Gray, 1866 -- invalid
  Euchelymys Gray, 1871 -- invalid
  Euchelymys spinosa Gray, 1871 -- invalid
  Euchelymys sulcifera Gray, 1871 -- invalid
  Eucnemis bicolor Gray, 1842 -- invalid
  Eudorcas rufifrons (Gray, 1846) -- valid -- Red-fronted Gazelle
  Eudorcas rufifrons rufifrons (Gray, 1846) -- valid
  Eudyptes pachyrhynchus G. R. Gray, 1845 -- valid -- Fiordland Penguin
  Eulemur coronatus (Gray, 1842) -- valid -- Crowned Lemur
  Eulemur flavifrons (Gray, 1867) -- valid -- Blue-eyed Black Lemur
  Eulemur macaco flavifrons (Gray, 1867) -- invalid
  Eulimella Gray, 1847 -- valid
  Eulipoa wallacei (G. R. Gray, 1861) -- valid -- Moluccan Megapode
  Eumetopias jubatus monteriensis (Gray, 1859) -- valid -- Loughlin's northern sea lion, Loughlin's Steller sea lion
  Eunapius Gray, 1867 -- valid
  Euoticus Gray, 1863 -- valid -- needle-clawed galagos
  Euoticus pallidus (Gray, 1863) -- valid -- Northern Needle-clawed Bushbaby, Northern Needle-clawed Galago, Pallid Needle-clawed Galago
  Euoticus pallidus pallidus (Gray, 1863) -- valid -- Bioko Needle-clawed Galago
  Euphrosyne Gray, 1866 -- invalid
  Euplectellidae Gray, 1867 -- valid
  Euplectellinae Gray, 1867 -- valid
  Euplectes capensis phoenicomerus G. R. Gray, 1862 -- valid
  Eupleurogrammus muticus (Gray, 1831) -- valid -- smallhead hairtail
  Eupodotis senegalensis barrowii (J. E. Gray, 1829) -- valid
  Euprepes maculilabris Gray, 1845 -- invalid
  Euprymna penares (Gray, 1849) -- valid
  Eurhinoceros Gray, 1867 -- invalid
  Eurypon Gray, 1867 -- valid
  Eurystomus azureus G. R. Gray, 1861 -- valid -- Azure Dollarbird, Azure Roller, Carraca moluqueña, Purple Roller, Rolle azuré
  Euryurus leachii (Gray, 1832) -- valid
  Euryurus leachii leachii (Gray, 1832) -- valid
  Eutropia Gray, 1862 -- invalid
  Eutropis bibronii (Gray, 1839) -- valid -- Seashore Skink
  Eutropis multicarinata (Gray, 1845) -- valid -- Many-keeled Mabuya
  Eutropis trivittata (Hardwicke and Gray, 1827) -- valid -- Three-banded Mabuya
  Falco cherrug J. E. Gray, 1834 -- valid -- Faucon sacre, Halcón sacre, sacre, Saker Falcon
  Falco cherrug cherrug J. E. Gray, 1834 -- valid
  Falco jugger J. E. Gray, 1834 -- valid -- falcão-lágar, Faucon laggar, Halcón yággar, Laggar Falcon
  Falco subniger G. R. Gray, 1843 -- valid -- Black Falcon, falcão-preto, Faucon noir, Halcón negro
  Fanellia Gray, 1870 -- valid
  Farancia Gray, 1842 -- valid -- Mud Snakes, Mudsnakes, Rainbow Snakes
  Farreidae Gray, 1872 -- valid
  Fasciolariidae Gray, 1853 -- valid
  Favorinus M. E. Gray, 1850 -- valid
  Felis chaus affinis Gray, 1830 -- valid
  Felis silvestris caudata Gray, 1874 -- valid
  Felis silvestris ornata Gray, 1832 -- valid
  Ferania Gray, 1842 -- valid
  Ferdina Gray, 1840 -- valid
  Ferdina cumingi Gray, 1840 -- invalid
  Ferdina flavescens Gray, 1840 -- valid
  Feresa Gray, 1870 -- valid -- pygmy killer whales
  Feresa attenuata Gray, 1874 -- valid -- Orca pigmea, Pygmy Killer Whale
  Feylinia Gray, 1845 -- valid
  Feylinia currori Gray, 1845 -- valid -- Western Forest Feylinia
  Fibulariidae Gray, 1855 -- valid
  Ficedula superciliaris aestigma (J. E. Gray & G. R. Gray, 1847) -- valid
  Ficimia Gray, 1849 -- valid -- Mexican Hook-nosed Snakes, Southern Hook-nosed Snakes
  Ficimia olivacea Gray, 1849 -- valid -- Culebra-naricilla huasteca
  Fidenas Gray, 1849 -- invalid
  Filigella Gray, 1868 -- valid
  Fionidae Gray, 1857 -- valid
  Flabellum macandrewi Gray, 1849 -- valid -- splitting fan coral
  Flustrella Gray, 1848 -- invalid
  Fordia Gray, 1869 -- invalid
  Fordia africana Gray, 1869 -- invalid
  Fordonia Gray, 1837 -- valid
  Fordonia unicolor Gray, 1849 -- invalid
  Formicariidae G. R. Gray, 1840 -- valid
  Forpus modestus sclateri (G. R. Gray, 1859) -- valid
  Forpus sclateri (G. R. Gray, 1859) -- invalid -- Dusky-billed Parrotlet
  Forpus sclateri sclateri (G. R. Gray, 1859) -- invalid
  Forsterina koghiana Gray, 1992 -- valid
  Fossa Gray, 1865 -- valid
  Francolinus leucoscepus G. R. Gray, 1867 -- valid -- Yellow-necked Francolin
  Francolinus pictus pallidus (J. E. Gray, 1831) -- valid
  Francolinus psilolaemus G. R. Gray, 1867 -- valid -- Moorland Francolin
  Francolinus psilolaemus psilolaemus G. R. Gray, 1867 -- valid
  Francolinus sephaena rovuma G. R. Gray, 1867 -- valid
  Fregata ariel (G. R. Gray, 1845) -- valid -- Frégate ariel, Lesser Frigatebird
  Fregata ariel ariel (G. R. Gray, 1845) -- valid
  Fromia Gray, 1840 -- valid
  Fromia subulata (Gray, 1840) -- invalid
  Funisciurus isabella (Gray, 1862) -- valid -- Lady Burton's Rope Squirrel
  Funisciurus isabella isabella (Gray, 1862) -- invalid
  Furcifer lateralis (Gray, 1831) -- valid -- Carpet Chameleon
  Furcifer rhinoceratus (Gray, 1845) -- valid
  Furina ornata (Gray, 1842) -- valid -- Orange-naped Snake
  Furipteridae Gray, 1866 -- valid -- Smoky Bat, Thumbless Bat
  Gactornis enarratus (G. R. Gray, 1871) -- valid -- Collared Nightjar
  Gadila Gray, 1847 -- valid
  Galagidae Gray, 1825 -- valid -- bushbabies, galagos
  Galago gabonensis Gray, 1863 -- invalid -- Gabon Bushbaby
  Galago sennariensis Gray, 1863 -- invalid
  Galagonidae Gray, 1825 -- invalid
  Galaxias fasciatus Gray, 1842 -- valid -- Banded kokopu
  Galeommatidae Gray, 1840 -- valid
  Galeommatoidea J. E. Gray, 1840 -- valid
  Galerella Gray, 1865 -- valid
  Galerella ochracea (J. E. Gray, 1848) -- valid -- Somalian Slender Mongoose
  Galerella ochracea ochracea (J. E. Gray, 1848) -- valid
  Galerella sanguinea grantii (Gray, 1865) -- valid
  Galidiinae Gray, 1865 -- valid
  Gallicolumba stairi (G. R. Gray, 1856) -- invalid -- Friendly Ground-Dove, Tongan Ground Dove
  Gallinago hardwickii (J. E. Gray, 1831) -- valid -- Japanese Snipe, Latham's Snipe
  Gallinago stricklandii (G. R. Gray, 1845) -- valid -- Fuegian Snipe
  Gallinula melanops crassirostris (J. E. Gray, 1829) -- valid
  Gallirallus dieffenbachii (G. R. Gray, 1843) -- valid
  Gallirallus philippensis assimilis (G. R. Gray, 1843) -- valid
  Ganeria Gray, 1847 -- valid
  Ganeria falklandica Gray, 1847 -- valid
  Garra gotyla (Gray, 1830) -- valid
  Gastrochaenidae Gray, 1840 -- valid
  Gavia adamsii (G. R. Gray, 1859) -- valid -- Colimbo de Adams, Plongeon à bec blanc, White-billed Diver, Yellow-billed Loon
  Gavicalis versicolor sonoroides (G. R. Gray, 1862) -- valid
  Gazella dama mohr Gray, 1846 -- invalid
  Gazella dorcas isabella Gray, 1846 -- valid
  Gazella rufifrons Gray, 1846 -- invalid -- red-fronted gazelle
  Geckoella Gray, 1867 -- valid
  Gehyra Gray, 1834 -- valid -- Dtellas, Web-toed Geckos
  Gehyra australis Gray, 1845 -- valid
  Gekko chinensis Gray, 1842 -- valid
  Gekko reevesii (Gray, 1831) -- valid
  Gekko smithii Gray, 1842 -- valid
  Gelada Gray, 1843 -- invalid
  Gelada ruppelli Gray, 1843 -- invalid
  Gellius Gray, 1867 -- valid
  Genetta maculata (Gray, 1830) -- valid -- panther genet, Rusty-spotted Genet
  Geochelone chilensis (Gray, 1870) -- invalid -- Chaco tortoise
  Geoclemmys sebae Gray, 1869 -- invalid
  Geoclemys Gray, 1856 -- valid -- spotted pond turtles
  Geoclemys callocephalus Gray, 1863 -- invalid
  Geoclemys hamiltonii (Gray, 1830) -- valid -- Black Pond Turtle, Spotted Pond Turtle
  Geodiidae Gray, 1867 -- valid
  Geoemyda Gray, 1834 -- valid -- Leaf Turtles
  Geoffroyus geoffroyi aruensis (G. R. Gray, 1858) -- valid
  Geophaps G. R. Gray, 1842 -- valid
  Geotria Gray, 1851 -- valid
  Geotria australis Gray, 1851 -- valid -- lamproie saccifère, pouched lamprey
  Geotriton bellii (Gray, 1850) -- invalid
  Gerarda Gray, 1849 -- valid
  Gerarda bicolor Gray, 1849 -- invalid
  Gerbillinae Gray, 1825 -- valid
  Gerbilliscus afra (Gray, 1830) -- valid -- Cape Gerbil
  Gerbillus erythrourus Gray, 1842 -- invalid
  Gerbillus hardwickei Gray, 1843 -- invalid
  Gerrhonotus kingii (Gray, 1838) -- invalid
  Gerygone albofrontata G. R. Gray, 1845 -- valid -- Chatham Gerygone
  Gerygone chrysogaster G. R. Gray, 1858 -- valid -- Yellow-bellied Gerygone
  Gerygone chrysogaster chrysogaster G. R. Gray, 1858 -- valid
  Gerygone flavolateralis (G. R. Gray, 1859) -- valid -- Fan-tailed Gerygone
  Gerygone flavolateralis flavolateralis (G. R. Gray, 1859) -- valid
  Gerygone magnirostris conspicillata (G. R. Gray, 1859) -- valid
  Giraffidae Gray, 1821 -- valid -- giraffes
  Girella Gray, 1835 -- valid -- greenfish
  Girella punctata Gray, 1835 -- valid -- largescale blackfish, largescale blackfish
  Glabaris Gray, 1847 -- invalid
  Gladiator Gray, 1870 -- invalid
  Glareola nuchalis G. R. Gray, 1849 -- valid -- Rock Pratincole
  Glareola nuchalis nuchalis G. R. Gray, 1849 -- valid
  Glauconomidae Gray, 1853 -- valid
  Glauconycteris poensis (Gray, 1842) -- valid -- Abo Butterfly Bat
  Globicephala macrorhynchus Gray, 1846 -- valid -- Short-finned Pilot Whale
  Globicephala sieboldii Gray, 1846 -- invalid
  Globicephalidae Gray, 1850 -- invalid
  Glossidae Gray, 1847 -- valid
  Glossoidea J. E. Gray, 1847 -- valid
  Glossophaga leachii (Gray, 1844) -- valid -- Gray Long-tongued Bat, Gray's Long-tongued Bat
  Glossopsitta pulchella (G. R. Gray, 1859) -- invalid
  Gloydius halys affinis (Gray, 1849) -- valid
  Glyciphila flavotincta G. R. Gray, 1870 -- invalid
  Glyciphila modesta G. R. Gray, 1858 -- invalid
  Glyciphila poliotis G. R. Gray, 1859 -- invalid
  Glycobius haiji (Gray in Griffiths, 1832) -- invalid
  Glycobius hayii (Gray in Griffith, 1831) -- invalid
  Glyphocassis trilineata (Hope in Gray, 1831) -- valid
  Gnathaster miliaris (Gray, 1847) -- invalid
  Gobiomorphus basalis (Gray, 1842) -- valid
  Goggia lineata (Gray, 1838) -- valid
  Golunda Gray, 1837 -- valid
  Golunda ellioti Gray, 1837 -- valid -- Indian Bush Rat
  Golunda pulchella Gray, 1864 -- invalid
  Gomophia Gray, 1840 -- valid
  Gomophia egyptiaca Gray, 1840 -- valid
  Gonatodes ocellatus (Gray, 1831) -- valid -- Eyespot Gecko, Ocellated Gecko
  Gonatus Gray, 1849 -- valid
  Goniaster abbensis Gray, 1843 -- invalid
  Goniaster belcheri (Gray, 1847) -- invalid
  Goniaster duebeni (Gray, 1847) -- invalid
  Goniaster incei (Gray, 1847) -- invalid
  Goniaster sebae Gray, 1840 -- invalid
  Goniaster tuberculatus (Gray, 1847) -- invalid
  Goniodiscaster granuliferus (Gray, 1847) -- valid
  Goniodiscus armata (Gray, 1840) -- invalid
  Goniodiscus granuliferus (Gray, 1847) -- invalid
  Goniodiscus horridus (Gray, 1840) -- invalid
  Goniotropis Gray, 1831 -- valid
  Goniotropus Gray, 1831 -- invalid
  Gonocephalus grandis (Gray, 1845) -- valid -- Giant Forest Dragon
  Gonocephalus sophiae (Gray, 1845) -- valid -- Negros Forest Dragon
  Gonopterus Gronow in Gray, 1854 -- invalid
  Gonopterus moerens Gronow in Gray, 1854 -- invalid
  Gonyosoma frenatum (Gray, 1853) -- valid
  Gopher Gray, 1870 -- invalid
  Gorgon Gray, 1850 -- invalid
  Grampus Gray, 1828 -- valid -- grampus
  Graptemys pseudogeographica (Gray, 1831) -- valid -- False Map Turtle
  Graptemys pseudogeographica pseudogeographica (Gray, 1831) -- valid -- False Map Turtle, Northern False Map Turtle
  Grayenulla spinimana Zabka & Gray, 2002 -- valid
  Grayenulla wilganea Zabka & Gray, 2002 -- valid
  Guereza Gray, 1870 -- invalid
  Guereza ruppelli Gray, 1870 -- invalid
  Guildfordia Gray, 1850 -- valid
  Guloninae Gray, 1825 -- valid
  Gymnasteria Gray, 1840 -- invalid
  Gymnasteria inermis Gray, 1840 -- invalid
  Gymnasteria spinosa Gray, 1840 -- invalid
  Gymnocrex plumbeiventris (G. R. Gray, 1862) -- valid -- Bare-eyed Rail
  Gymnocrex plumbeiventris plumbeiventris (G. R. Gray, 1862) -- valid
  Gymnodactylus darwinii (Gray, 1845) -- valid
  Gymnomys Gray, 1867 -- invalid
  Gymnopus leucocephalus Gray, 1865 -- invalid
  Gymnorhina G. R. Gray, 1840 -- valid
  Gyps tenuirostris G. R. Gray, 1844 -- valid -- Slender-billed Vulture
  Habroptila G. R. Gray, 1861 -- valid
  Habroptila wallacii G. R. Gray, 1861 -- valid -- Invisible Rail
  Hacelia Gray, 1840 -- valid
  Hacelia attenuata (Gray, 1840) -- valid -- estrella de mar lisa, étoile de mer lisse, smooth starfish
  Hadronyche adelaidensis (Gray, 1984) -- valid
  Hadronyche eyrei (Gray, 1984) -- valid
  Hadronyche flindersi (Gray, 1984) -- valid
  Halcrosia nigra Gray, 1867 -- invalid
  Halibalaena Gray, 1873 -- invalid
  Halichondrida Gray, 1867 -- valid
  Halichondriidae Gray, 1867 -- valid
  Haliclona (Gellius) Gray, 1867 -- valid
  Halicyon richardii Gray, 1864 -- invalid
  Haliichthys Gray, 1859 -- valid
  Haliichthys taeniophora Gray, 1859 -- invalid -- slender tangelfish, slender tangelfish
  Haliichthys taeniophorus Gray, 1859 -- valid -- slender tangelfish
  Haliotis cunninghami J. Gray, 1826 -- invalid
  Haliotis excisa J. Gray, 1856 -- invalid
  Haliotis roei J. Gray, 1826 -- valid
  Haliotis squamosa J. Gray, 1826 -- valid
  Hamacantha Gray, 1867 -- valid
  Hamacantha (Hamacantha) Gray, 1867 -- valid
  Hamacanthidae Gray, 1872 -- valid
  Hamadryas aegyptiaca Gray, 1870 -- invalid
  Hamigera Gray, 1867 -- valid
  Haminoea elegans (J. E. Gray, 1825) -- valid -- elegant glassy-bubble
  Hanleya Gray, 1857 -- valid
  Hanno Gray, 1821 -- invalid
  Hapalemur (Prolemur) Gray, 1870 -- invalid
  Hapalemur simus Gray, 1870 -- invalid
  Hapalotis melanura Gray, 1844 -- invalid
  Hapalotis richardsonii Gray, 1844 -- invalid
  Hapanella Gray, 1870 -- invalid
  Hardella Gray, 1870 -- valid -- Crowned River Turtles
  Hardella indi Gray, 1870 -- invalid
  Hardella thurjii (Gray, 1831) -- valid -- Crowned River Turtle
  Harpiocephalus Gray, 1842 -- valid
  Heleioforus Gray, 1841 -- invalid
  Heleioporus Gray, 1841 -- valid
  Heleioporus albopunctatus Gray, 1841 -- valid
  Heleioporus eyrei (Gray, 1845) -- valid
  Heliaster Gray, 1840 -- valid
  Heliaster cumingi (Gray, 1840) -- valid
  Helicops trivittatus (Gray, 1849) -- valid -- Equatorial Keelback
  Helictidinae Gray, 1865 -- valid
  Helictidini Gray, 1865 -- invalid
  Helictis Gray, 1831 -- invalid
  Helictis moschata Gray, 1831 -- invalid
  Heliomys Gray, 1873 -- invalid
  Heliomys jeudii Gray, 1873 -- invalid
  Heliopais personata (G. R. Gray, 1849) -- invalid
  Heliopais personatus (G. R. Gray, 1849) -- valid -- Masked Finfoot
  Heliophobius argenteocinereus albifrons (Gray, 1864) -- valid
  Heliophoca atlantica Gray, 1854 -- invalid
  Helioporus Gray, 1841 -- invalid
  Heliosciurus mutabilis shirensis (Gray, 1867) -- valid
  Heliosciurus rufobrachium isabellinus (Gray, 1867) -- valid
  Helodermatidae Gray, 1837 -- valid -- Beaded Lizards, Gila Monsters, Venomous Lizards
  Helogale Gray, 1862 -- valid
  Hemidactylus Gray, 1825 -- valid -- Half-toed Geckos, House Geckos
  Hemidactylus bowringii (Gray, 1845) -- valid
  Hemidactylus brookii Gray, 1845 -- valid -- Brook's House Gecko
  Hemidactylus depressus Gray, 1842 -- valid
  Hemidactylus fasciatus Gray, 1842 -- valid
  Hemidactylus mercatorius Gray, 1842 -- valid
  Hemidactylus richardsonii (Gray, 1845) -- valid
  Hemiechinus collaris (Gray, 1830) -- valid -- Indian Long-eared Hedgehog
  Hemiergis peronii (Gray, 1831) -- valid -- Lowlands Earless Skink
  Hemigalinae Gray, 1865 -- valid
  Hemigalus derbyanus (Gray, 1837) -- valid -- Banded Palm Civet
  Hemigalus derbyanus derbyanus (Gray, 1837) -- valid
  Hemignathus ellisianus (G. R. Gray, 1860) -- invalid -- Greater Akialoa
  Hemignathus ellisianus ellisianus (G. R. Gray, 1860) -- invalid
  Hemisphaeriodon gerrardii (Gray, 1845) -- invalid
  Henicopernis G. R. Gray, 1859 -- valid
  Henicophaps G. R. Gray, 1862 -- valid
  Henicophaps albifrons G. R. Gray, 1862 -- valid -- New Guinea Bronzewing
  Henicophaps albifrons albifrons G. R. Gray, 1862 -- valid
  Henricia Gray, 1840 -- valid
  Heosemys grandis (Gray, 1860) -- valid -- Giant Asian Pond Turtle
  Heosemys spinosa (Gray, 1830) -- valid -- Spiny Turtle
  Heptranchus Gray, 1851 -- invalid
  Heremites Gray, 1845 -- valid
  Herpestes brachyurus Gray, 1837 -- valid -- Short-tailed Mongoose
  Herpestes brachyurus brachyurus Gray, 1837 -- valid
  Herpestes fuscus maccarthiae (Gray, 1851) -- valid
  Herpestes ichneumon widdringtonii Gray, 1842 -- valid
  Herpestes semitorquatus Gray, 1846 -- valid -- Collared Mongoose
  Herpestes semitorquatus semitorquatus Gray, 1846 -- valid
  Herpestes smithii Gray, 1837 -- valid -- Ruddy Mongoose
  Herpestes smithii smithii Gray, 1837 -- valid
  Herpetrodryas frenatus Gray, 1853 -- invalid
  Hespererato maugeriae (J. E. Gray, 1832) -- valid -- green erato
  Heterocyathus hemisphaericus Gray, 1849 -- valid
  Heterodontidae Gray, 1851 -- valid -- bullhead sharks, horn sharks, Port Jackson sharks, requins cornus, tiburones cornudos
  Heterodontus zebra (Gray, 1831) -- valid -- zebra bullhead shark
  Heterohyrax Gray, 1868 -- valid -- Bush Hyraxes
  Heterohyrax brucei (Gray, 1868) -- valid -- Yellow-spotted Rock Hyrax
  Heterohyrax brucei bakeri (Gray, 1874) -- valid
  Heterohyrax brucei bocagei (Gray, 1869) -- valid
  Heterohyrax brucei brucei (Gray, 1868) -- valid
  Heteromyidae Gray, 1868 -- valid -- heteromyid rodents, Kangaroo Mice, Kangaroo Rats, Pocket Mice
  Heteromyinae Gray, 1868 -- valid
  Heteromys desmarestianus Gray, 1868 -- valid -- Desmarest's Spiny Pocket Mouse
  Heteromys desmarestianus desmarestianus Gray, 1868 -- valid
  Heteronotia binoei (Gray, 1845) -- valid
  Heteropsammia eupsammides (Gray, 1849) -- valid
  Heterotella Gray, 1867 -- valid
  Heteroteuthis Gray, 1849 -- valid
  Heteroteuthis (Heteroteuthis) Gray, 1849 -- valid
  Heterotriton Gray, 1850 -- invalid
  Hexanchidae Gray, 1851 -- valid -- cow sharks, grisets, sevengill sharks, sixgill sharks, tiburones cañabota
  Hiatellidae Gray, 1824 -- valid
  Hiatelloidea J. E. Gray, 1824 -- valid
  Himantura gerrardi (Gray, 1851) -- valid
  Hinea Gray, 1847 -- valid
  Hinnites giganteus J. E. Gray, 1825 -- invalid
  Hipistes Gray, 1849 -- invalid
  Hipistes fasciatus Gray, 1849 -- invalid
  Hippasteria Gray, 1840 -- valid
  Hippasteria cornuta Gray, 1840 -- invalid
  Hippasteria europaea Gray, 1840 -- invalid
  Hippasteria johnstoni (Gray in Johnston, 1836) -- invalid
  Hippasteria plana Gray, 1840 -- invalid
  Hippopotamidae Gray, 1821 -- valid -- hippopotamuses
  Hipposideros Gray, 1831 -- valid
  Hipposideros aruensis Gray, 1858 -- invalid
  Hipposideros ater aruensis Gray, 1858 -- valid
  Hipposideros fulvus Gray, 1838 -- valid -- Fulvus Leaf-nosed Bat, fulvus roundleaf bat
  Hipposideros fulvus fulvus Gray, 1838 -- valid
  Hippotigris campestris Gray, 1852 -- invalid
  Hippotragus equinus koba (Gray, 1872) -- valid
  Hirundo nigrita G. R. Gray, 1845 -- valid -- White-bibbed Swallow
  Hodgsonius phaenicuroides (J. E. Gray & G. R. Gray, 1847) -- invalid
  Hodgsonius phoenicuroides (J. E. Gray & G. R. Gray, 1847) -- valid -- White-bellied Redstart
  Hodgsonius phoenicuroides phoenicuroides (J. E. Gray & G. R. Gray, 1847) -- valid
  Holacanthus arcuatus Gray, 1831 -- invalid -- bandit angelfish
  Holaspis Gray, 1863 -- valid
  Holaspis guentheri Gray, 1863 -- valid -- Sawtail Lizard
  Holocanthus Gronow in Gray, 1854 -- invalid
  Holocanthus areolatus Gronow in Gray, 1854 -- invalid
  Holocanthus melanothos Gronow in Gray, 1854 -- invalid
  Homalopsis australis Gray, 1842 -- invalid
  Homalopsis hardwickii Gray, 1842 -- valid -- Hardwick's Water Snake
  Homelaphus Gray, 1872 -- invalid
  Hominidae Gray, 1825 -- valid -- Great Apes, man-like primates
  Homininae Gray, 1825 -- valid -- African apes
  Hominoidea Gray, 1825 -- valid
  Homonota Gray, 1845 -- valid
  Homophyton Gray, 1866 -- valid
  Hoplodactylus granulatus (Gray, 1845) -- invalid
  Hoplodactylus maculatus (Gray, 1845) -- invalid
  Hoplodactylus pacificus (Gray, 1842) -- invalid
  Hosea Gray, 1866 -- invalid
  Hosia Gray, 1840 -- invalid
  Hosia flavescens Gray, 1840 -- invalid
  Hosia spinulosa Gray, 1847 -- invalid
  Houlema Gray, 1831 -- invalid
  Houlema obscura Gray, 1831 -- invalid
  Hunterius Gray, 1866 -- invalid
  Hunterus temminckii Gray, 1864 -- invalid
  Huntia Gray & Thompson, 2001 -- valid
  Huntia deepensis Gray & Thompson, 2001 -- valid
  Huntia murrindal Gray & Thompson, 2001 -- valid
  Huntiglennia Zabka & Gray, 2004 -- valid
  Huntiglennia williamsi Zabka & Gray, 2004 -- valid
  Hyaenidae Gray, 1821 -- valid -- Hyenas
  Hyaeninae Gray, 1821 -- invalid
  Hyalonema Gray, 1832 -- valid
  Hyalonema (Hyalonema) Gray, 1832 -- valid
  Hyalonematidae Gray, 1857 -- valid
  Hyaloteuthis Gray, 1849 -- valid
  Hydraspis australis Gray, 1841 -- invalid
  Hydraspis bicolor Gray, 1873 -- invalid
  Hydraspis bitentaculata Gray, 1831 -- invalid
  Hydraspis constricta Gray, 1831 -- invalid
  Hydraspis gordoni Gray, 1868 -- invalid
  Hydraspis maculata Gray, 1873 -- invalid
  Hydrochaeridae Gray, 1825 -- invalid
  Hydrochoerinae Gray, 1825 -- valid
  Hydromedusa depressa Gray, 1856 -- invalid
  Hydromedusa platanensis Gray, 1873 -- invalid
  Hydromedusa subdepressa Gray, 1854 -- invalid
  Hydrophis belcheri (Gray, 1849) -- valid -- Faint-banded Seasnake
  Hydrophis elegans (Gray, 1842) -- valid -- Bar-bellied Seasnake, Elegant Seasnake
  Hydrophis hardwickii (Gray, 1835) -- valid -- Hardwicke's Spine-bellied Seasnake
  Hydrophis inornatus (Gray, 1849) -- valid -- Inornate Sea Snake, Plain Seasnake
  Hydrophis jerdonii (Gray, 1849) -- valid -- Jerdon's Sea Snake
  Hydrophis jerdonii jerdonii (Gray, 1849) -- valid
  Hydrophis lapemoides (Gray, 1849) -- valid -- Persian Gulf Sea Snake
  Hydrophis melanocephalus Gray, 1849 -- valid -- Slender-necked Seasnake
  Hydrophis ocellatus Gray, 1849 -- valid
  Hydrophis ornatus (Gray, 1842) -- valid -- Ornate Reef Seasnake
  Hydrophis ornatus ocellatus Gray, 1849 -- invalid
  Hydrophis ornatus ornatus (Gray, 1842) -- valid
  Hydrophis stokesii (Gray, 1846) -- valid -- Stoke's Seasnake
  Hydrophis sublaevis melanocephalus Gray, 1849 -- invalid
  Hydrus stokesii Gray, 1846 -- invalid
  Hyemoschus Gray, 1845 -- valid
  Hyla adelaidensis Gray, 1841 -- invalid
  Hyla bicolor bicolor (Gray, 1842) -- invalid
  Hyla bioculata Gray, 1841 -- invalid
  Hyla maculata Gray, 1830 -- invalid
  Hyla nasuta (Gray, 1842) -- invalid
  Hyla rubella Gray, 1842 -- invalid
  Hylaedactylus Gray, 1831 -- invalid
  Hylella bicolor (Gray, 1842) -- invalid
  Hylobates pileatus Gray, 1861 -- valid -- Pileated Gibbon
  Hylobatidae Gray, 1871 -- valid -- gibbons
  Hylopetes fimbriatus (Gray, 1837) -- invalid -- Kashmir Flying Squirrel
  Hymenolaimus G. R. Gray, 1843 -- valid
  Hyperoodon capensis Gray, 1865 -- invalid
  Hyperoodon latifrons Gray, 1846 -- invalid
  Hyperoodontidae Gray, 1846 -- valid -- beaked whales
  Hyperoodontina Gray, 1846 -- invalid
  Hypnale zara (Gray, 1849) -- valid
  Hypsirhina bennettii Gray, 1842 -- invalid
  Hypsirhina bilineata Gray, 1842 -- invalid
  Hypsirhina chinensis Gray, 1842 -- invalid
  Hypsirhina furcata Gray, 1842 -- invalid
  Hypsirhina indica (Gray, 1842) -- invalid
  Hypsirhina punctata (Gray, 1849) -- invalid
  Hypsirhina sinensis Gray, 1842 -- invalid
  Hyria intermedia Gray, 1825 -- invalid
  Hyria matoni Gray, 1825 -- invalid
  Hystrix brachyura hodgsoni (Gray, 1847) -- valid
  Ianthella Gray, 1869 -- valid
  Ida Gray, 1873 -- invalid
  Ilisha affinis (Gray, 1830) -- invalid
  Indicator maculatus G. R. Gray, 1847 -- valid -- Spotted Honeyguide
  Indicator maculatus maculatus G. R. Gray, 1847 -- valid
  Indri indri variegatus (Gray, 1872) -- invalid
  Iniidae Gray, 1846 -- valid -- river dolphins
  Inimicus cuvieri (Gray, 1835) -- valid
  Intellagama lesueurii (Gray, 1831) -- valid -- Eastern Water Dragon
  Intellagama lesueurii lesueurii (Gray, 1831) -- valid -- Eastern Water Dragon
  Iophon Gray, 1867 -- valid
  Iphisa Gray, 1851 -- valid
  Iphisa elegans Gray, 1851 -- valid -- Glossy Shade Lizard
  Iphisa elegans elegans Gray, 1851 -- valid
  Irciniidae Gray, 1867 -- valid
  Isaurus Gray, 1828 -- valid
  Ischnochiton Gray, 1847 -- valid
  Ischnochiton striolatus (J. E. Gray, 1828) -- valid
  Isidella Gray, 1857 -- valid
  Isola Gray, 1873 -- invalid
  Isthmura bellii (Gray, 1850) -- valid
  Istiophorus flavescens Gray, 1831 -- invalid
  Jacana jacana hypomelaena (G. R. Gray, 1846) -- valid
  Jacare longiscutata Gray, 1862 -- invalid
  Jacare multiscutata Gray, 1867 -- invalid
  Jacare ocellata Gray, 1862 -- invalid
  Jacchus leucogenys Gray, 1870 -- invalid
  Jacchus leucomerus Gray, 1846 -- invalid
  Jamberoo Gray & Smith, 2008 -- valid
  Jamberoo actensis Gray & Smith, 2008 -- valid
  Jamberoo australis Gray & Smith, 2008 -- valid
  Jamberoo boydensis Gray & Smith, 2008 -- valid
  Jamberoo johnnoblei Gray & Smith, 2008 -- valid
  Janusia Gray, 1973 -- valid
  Janusia muiri Gray, 1973 -- valid
  Japalura Gray, 1853 -- valid
  Japalura variegata Gray, 1853 -- valid -- Variegated Mountain Lizard
  Jaspis Gray, 1867 -- valid
  Jerdonella Gray, 1870 -- invalid
  Julis hardwickii Gray, 1832 -- invalid
  Kachuga Gray, 1856 -- invalid -- Indian roofed turtles
  Kachuga dhongoka (Gray, 1832) -- invalid -- Three-striped Roofed Turtle
  Kachuga hardwickii Gray, 1869 -- invalid
  Kachuga kachuga (Gray, 1831) -- invalid -- Red-crowned Roofed Turtle
  Kachuga major Gray, 1873 -- invalid
  Kachuga oldhami Gray, 1869 -- invalid
  Kachuga peguensis Gray, 1869 -- invalid
  Kachuga smithii (Gray, 1863) -- invalid -- Brown Roofed Turtle
  Kachuga tecta (Gray, 1830) -- invalid -- Indian Roofed Turtle
  Kachuga tentoria (Gray, 1834) -- invalid -- Indian Tent Turtle
  Kachuga trilineata Gray, 1869 -- invalid
  Kaestlea bilineata (Gray, 1846) -- valid -- Two-lined Ground Skink
  Kaiya Gray, 1987 -- valid
  Kaiya bemboka Gray, 1987 -- valid
  Kaiya parnabyi Gray, 1987 -- valid
  Kaiya terama Gray, 1987 -- valid
  Kallula Gray, 1831 -- invalid
  Kaloula Gray, 1831 -- valid
  Kaloula pulchra Gray, 1831 -- valid
  Kaloula pulchra pulchra Gray, 1831 -- invalid
  Karriella Gray & Smith, 2008 -- valid
  Karriella treenensis Gray & Smith, 2008 -- valid
  Karriella walpolensis Gray & Smith, 2008 -- valid
  Katharina Gray, 1847 -- valid
  Kenopia G. R. Gray, 1869 -- valid
  Kerilia Gray, 1849 -- invalid
  Kerilia jerdonii Gray, 1849 -- invalid
  Kerivoula Gray, 1842 -- valid
  Kerivoula poensis Gray, 1842 -- invalid
  Kinixys belliana Gray, 1830 -- valid -- Bell's Hinge-back Tortoise
  Kinixys spekii Gray, 1863 -- valid -- Speke's Hinge-back Tortoise
  Kinosternon acutum Gray, 1831 -- valid -- Tabasco Mud Turtle, Tortuga-pecho quebrado de Tabasco
  Kinosternon doubledayii Gray, 1844 -- invalid
  Kinosternon hippocrepis Gray, 1856 -- invalid
  Kinosternon oblongum Gray, 1844 -- invalid
  Kinosternon punctatum Gray, 1856 -- invalid
  Kinosternon scorpioides acuta Gray, 1831 -- invalid
  Kinosternon subrubrum hippocrepis Gray, 1856 -- valid -- Mississippi Mud Turtle
  Kobus leche Gray, 1850 -- valid -- lechwe, Lechwe, red lechwe
  Kobus leche leche Gray, 1850 -- valid
  Kogia Gray, 1846 -- valid -- pygmy sperm whales, small sperm whales
  Labrus chlorodus Gronow in Gray, 1854 -- invalid
  Labrus multicostatus Gronow in Gray, 1854 -- invalid
  Labrus ornatus Gronow in Gray, 1854 -- invalid
  Lacerta laevis Gray, 1838 -- invalid
  Lagenocetus Gray, 1863 -- invalid
  Lagenorhynchus Gray, 1846 -- valid -- white-beaked dolphins, white-sided dolphins
  Lagenorhynchus acutus (Gray, 1828) -- valid -- Atlantic White-sided Dolphin, dauphin à flancs blancs
  Lagenorhynchus albirostris (Gray, 1846) -- valid -- dauphin à nez blanc, White-beaked Dolphin
  Lagenorhynchus asia Gray, 1846 -- invalid
  Lagenorhynchus clanculus Gray, 1846 -- invalid
  Lagenorhynchus electra Gray, 1846 -- invalid
  Lagenorhynchus obscurus (Gray, 1828) -- valid -- Dusky Dolphin
  Lagenorhynchus obscurus obscurus (Gray, 1828) -- valid -- African dusky dolphin, South African Dusky Dolphin
  Lalage atrovirens (G. R. Gray, 1862) -- valid -- Black-browed Triller
  Lalage atrovirens atrovirens (G. R. Gray, 1862) -- valid
  Lalage leucomela polygrammica (G. R. Gray, 1858) -- valid
  Lalage leucomela rufiventris (G. R. Gray, 1846) -- valid
  Lamprigera nepalensis (Hope in Gray, 1831) -- valid
  Landemania Gray, 1869 -- invalid
  Lapemis Gray, 1835 -- invalid
  Lapemis curtus hardwickii Gray, 1835 -- invalid
  Lapemis hardwickii Gray, 1835 -- invalid
  Laratus Gray, 1821 -- invalid
  Lasaeidae Gray, 1847 -- valid
  Laseadae Gray, 1847 -- invalid
  Lasiochila cylindrica (Hope in Gray, 1831) -- valid
  Lasiorhinus Gray, 1863 -- valid -- hairy-nosed wombats, soft-furred wombats
  Lasiurus Gray, 1831 -- valid -- hairy-tailed bats, red bats
  Lasiurus (Lasiurus) Gray, 1831 -- invalid
  Lataxina mollis Gray, 1843 -- invalid
  Laterallus G. R. Gray, 1855 -- valid -- Black Rails
  Laudakia Gray, 1845 -- valid
  Laudakia tuberculata (Gray, 1827) -- valid -- Kashmir Rock Agama, Tuberculated Agama
  Lavia Gray, 1838 -- valid
  Leggada Gray, 1837 -- invalid
  Leiaster leachi (Gray, 1840) -- valid
  Leila Gray, 1840 -- valid
  Leiocephalus Gray, 1827 -- valid -- Curly-tailed Lizards
  Leiocephalus carinatus Gray, 1827 -- valid -- Carinate Curly-tailed Lizard, Northern Curly-tailed Lizard
  Leiocephalus carinatus carinatus Gray, 1827 -- valid
  Leiocephalus cubensis (Gray, 1840) -- valid -- Cuban Curlytail Lizard
  Leiocephalus cubensis cubensis (Gray, 1840) -- valid
  Leiolepis belliana (Hardwicke and Gray, 1827) -- valid -- Common Butterfly Lizard
  Leiolepis belliana belliana (Gray, 1872) -- valid
  Leiolepis reevesii (Gray, 1831) -- valid -- Reeves' Butterfly Lizard
  Lelapia Gray, 1867 -- valid
  Lemnus Gray, 1825 -- invalid
  Lemur rufiventer Gray, 1870 -- invalid
  Lemuridae Gray, 1821 -- valid -- bamboo lemurs, ruffed lemurs, true lemurs
  Lemuriformes Gray, 1821 -- valid
  Lemuroidea Gray, 1821 -- valid
  Leodia Gray, 1852 -- valid
  Leontocebus leucogenys (Gray, 1866) -- valid -- Andean Saddle-back Tamarin
  Leopardus Gray, 1842 -- valid -- American spotted cats
  Leopardus griseus Gray, 1842 -- invalid
  Leopardus tigrinus pardinoides (Gray, 1867) -- valid
  Lepeta J. E. Gray, 1842 -- valid
  Lepetidae Gray, 1850 -- valid
  Lepidochitona Gray, 1821 -- valid
  Lepidophora aegeriiformis Gray, 1832 -- invalid
  Lepilemur dorsalis Gray, 1870 -- valid -- Black-striped Sportive Lemur, Gray's Sportive Lemur, Gray-backed Sportive Lemur
  Lepilemur pallidicauda Gray, 1873 -- invalid
  Lepilemuridae Gray, 1870 -- valid -- sportive lemurs
  Leptasterias polaris katherinae (Gray, 1840) -- valid
  Leptochariidae Gray, 1851 -- valid -- barbeled hound sharks, barbeled houndsharks
  Leptochiton Gray, 1847 -- valid
  Leptocoma sericea aspasioides (G. R. Gray, 1861) -- valid
  Leptocoma sericea auriceps (G. R. Gray, 1861) -- valid
  Leptonidae Gray, 1847 -- valid
  Leptophis punctulatus Gray, 1826 -- invalid
  Lepus (Eulagos) Gray, 1867 -- invalid
  Lepus bennetti Gray, 1843 -- invalid
  Lepus californicus Gray, 1837 -- valid -- Black-tailed Jack Rabbit, Black-tailed Jackrabbit, California Jackrabbit, Gray-sided Jackrabbit, Great Plains Jackrabbit, Jackass-hare, Liebre cola negra, Narrow-gauge Mule, Texan Hare, Texas Jack
  Lepus californicus bennettii Gray, 1843 -- valid -- San Diego black-tailed jackrabbit
  Lepus californicus californicus Gray, 1837 -- valid
  Lepus europaeus judeae Gray, 1867 -- valid
  Lepus sinensis Gray, 1832 -- valid -- Chinese Hare
  Lepus sinensis sinensis Gray, 1832 -- valid
  Lepus vermicula Gray, 1843 -- invalid
  Lerista bougainvillii (Gray, 1839) -- valid -- South-eastern Slider
  Lerista elegans (Gray, 1845) -- valid -- Elegant Slider
  Lerista gerrardii (Gray, 1864) -- valid -- Bold-striped Robust Slider
  Lerista microtis (Gray, 1845) -- valid -- South-western Slider
  Lerista microtis microtis (Gray, 1845) -- valid
  Leucocarbo chalconotus (G. R. Gray, 1845) -- valid -- Bronze Shag
  Leucochrysa longicornis (Gray in Cuvier, 1832) -- valid
  Leucopleurus Gray, 1866 -- invalid
  Leucosoma Gray, 1831 -- valid
  Leucozonia Gray, 1847 -- valid
  Lewinia G. R. Gray, 1855 -- valid
  Lialis Gray, 1835 -- valid
  Lialis burtonis Gray, 1835 -- valid
  Liaria Gray, 1852 -- valid
  Liasis Gray, 1842 -- valid
  Liasis childreni Gray, 1842 -- invalid
  Liasis olivaceus Gray, 1842 -- valid -- Olive Python
  Liasis olivaceus olivaceus Gray, 1842 -- valid
  Lichenostomus versicolor sonoroides (G. R. Gray, 1862) -- invalid
  Lichmera incana flavotincta (G. R. Gray, 1870) -- valid
  Lichmera incana poliotis (G. R. Gray, 1859) -- valid
  Lignella Gray, 1870 -- valid
  Limapontiidae Gray, 1847 -- valid
  Limnodynastes dorsalis (Gray, 1841) -- valid
  Limnodynastes dorsalis dorsalis (Gray, 1841) -- invalid
  Limnodynastes ornatus (Gray, 1842) -- invalid
  Linatella Gray, 1857 -- valid
  Linckia (Acalia) Gray, 1840 -- invalid
  Linckia (Phataria) Gray, 1840 -- invalid
  Linckia bifascialis Gray, 1840 -- invalid
  Linckia browni Gray, 1840 -- invalid
  Linckia columbiae Gray, 1840 -- valid
  Linckia crassa Gray, 1840 -- invalid
  Linckia guildingi Gray, 1840 -- valid
  Linckia guildingii Gray, 1840 -- invalid -- common comet star
  Linckia leachi Gray, 1840 -- invalid
  Linckia pacifica Gray, 1840 -- invalid
  Linckia subulata (Gray, 1840) -- invalid
  Linckia unifascialis Gray, 1840 -- invalid
  Liolaemus bellii Gray, 1845 -- valid
  Liolaemus gravenhorstii (Gray, 1845) -- valid -- Gravenhorst's Tree Iguana
  Liomys irroratus (Gray, 1868) -- valid -- Mexican Spiny Pocket Mouse, Ratón-espinoso mexicano
  Liomys irroratus irroratus (Gray, 1868) -- valid
  Liotia cancellata (Gray, 1828) -- valid
  Lipinia Gray, 1845 -- valid -- Lipinias
  Lipinia pulchella (Gray, 1845) -- valid -- Beautiful Lipinia
  Lipinia pulchella pulchella (Gray, 1845) -- valid
  Lissemys ceylonensis (Gray, 1856) -- valid -- Sri Lankan Flapshell Turtle
  Lithopoma Gray, 1850 -- valid
  Litoria adelaidensis (Gray, 1841) -- valid
  Litoria australis (Gray, 1842) -- invalid
  Litoria bicolor (Gray, 1842) -- valid
  Litoria nasuta (Gray, 1842) -- valid
  Litoria rubella (Gray, 1842) -- valid
  Littorina fasciata Gray, 1839 -- valid
  Littorina nigrolineata J. E. Gray, 1839 -- valid
  Littorinidae Gray, 1840 -- valid
  Lobodon Gray, 1844 -- valid
  Locustella fasciolata (G. R. Gray, 1861) -- valid -- Gray's Grasshopper Warbler
  Loligo chinensis Gray, 1849 -- invalid
  Loligo hardwickei Gray, 1849 -- invalid
  Loligo neglecta Gray, 1849 -- invalid
  Loliolus hardwickei (Gray, 1849) -- valid
  Lonchorhininae Gray, 1866 -- valid -- sword-nosed bats
  Lontra Gray, 1843 -- valid -- river otters
  Lophinus Gray, 1850 -- invalid
  Lophocebus albigena (Gray, 1850) -- valid -- Gray-cheeked Mangabey
  Lophocebus albigena albigena (Gray, 1850) -- valid
  Lophognathus Gray, 1842 -- valid
  Lophognathus gilberti Gray, 1842 -- valid -- Gilbert's Lashtail
  Lophura erythrophthalma pyronota (G. R. Gray, 1841) -- valid
  Lophura leucomelanos hamiltonii (J. E. Gray, 1829) -- valid
  Lophura leucomelanos lathami (J. E. Gray, 1829) -- valid
  Lophura nycthemera crawfurdii (J. E. Gray, 1829) -- valid
  Loriculus pusillus G. R. Gray, 1859 -- valid -- Yellow-throated Hanging Parrot
  Loridae Gray, 1821 -- invalid
  Lorisidae Gray, 1821 -- valid -- angwantibos, lorises, pottos
  Lorisinae Gray, 1821 -- valid
  Lorius hypoinochrous G. R. Gray, 1859 -- valid -- Purple-bellied Lory
  Lorius hypoinochrous hypoinochrous G. R. Gray, 1859 -- valid
  Luciocephalus pulcher (Gray, 1830) -- valid -- pikehead
  Luciola ovalis (Hope in Gray, 1831) -- invalid
  Luidia (Platasterias) Gray, 1871 -- invalid
  Luidia columbia (Gray, 1840) -- valid
  Luidia hardwicki (Gray, 1840) -- valid
  Luidia latiradiata (Gray, 1871) -- valid
  Lunarca Gray, 1857 -- invalid
  Lunatia Gray, 1847 -- valid
  Lunatia borealis (Gray, 1839) -- invalid
  Luperosaurus Gray, 1845 -- valid
  Luperosaurus cumingii Gray, 1845 -- valid
  Lutra (Lutrogale) Gray, 1865 -- invalid
  Lutra californica Gray, 1837 -- invalid
  Lutra chinensis Gray, 1837 -- invalid
  Lutra indica Gray, 1837 -- invalid
  Lutra lutra chinensis Gray, 1837 -- valid
  Lutra lutra whiteleyi (Gray, 1867) -- valid -- Japanese Otter
  Lutra macrodus Gray, 1879 -- invalid
  Lutra sumatrana (Gray, 1865) -- valid -- Hairy-nosed Otter
  Lutra swinhoei Gray, 1867 -- invalid
  Lutremys Gray, 1844 -- invalid
  Lutrogale Gray, 1865 -- valid
  Lutronectes Gray, 1867 -- invalid
  Lutronectes whiteleyi Gray, 1867 -- invalid
  Lycalopex culpaeus magellanicus (Gray, 1837) -- invalid
  Lycalopex griseus (Gray, 1837) -- invalid -- South American Gray Fox
  Lycodon melanocephalus Gray, 1835 -- invalid
  Lycodon olivaceus Gray, 1842 -- invalid
  Lycodon reticulatus Gray, 1842 -- invalid
  Lygodactylus Gray, 1864 -- valid
  Lygosoma Hardwicke & Gray, 1827 -- valid
  Lygosoma albopunctatum (Gray, 1846) -- invalid -- White-spotted Supple Skink
  Lygosoma lineata (Gray, 1839) -- invalid -- Lined Supple Skink
  Lygosoma pulchellum Gray, 1845 -- invalid
  Lygosoma vosmaeri (Gray, 1839) -- invalid -- Vosmer's Writhing Skink
  Mabuya multicarinata (Gray, 1845) -- invalid -- Many-keeled Mabuya
  Macacus cynomolgus cumingii Gray, 1870 -- invalid
  Macacus inornatus Gray, 1866 -- invalid
  Macacus lasiotus Gray, 1868 -- invalid
  Macacus macclellandii Gray, 1846 -- invalid
  Macacus problematicus Gray, 1870 -- invalid
  Macandrewia Gray, 1859 -- valid
  Machaerirhynchus flaviventer albifrons G. R. Gray, 1862 -- valid
  Machaerirhynchus flaviventer xanthogenys G. R. Gray, 1858 -- valid
  Machetornis G. R. Gray, 1841 -- valid
  Macrochelys Gray, 1856 -- valid -- Alligator Snapping Turtles
  Macrocheraia grandis (Gray, 1832) -- valid
  Macrocheraia grandis grandis (Gray, 1832) -- valid
  Macroclemys Gray, 1856 -- invalid -- alligator snapping turtles
  Macroglossinae Gray, 1866 -- invalid
  Macrogradungula Gray, 1987 -- valid
  Macrogradungula moonya Gray, 1987 -- valid
  Macronycteris Gray, 1866 -- valid
  Macrophyllini Gray, 1866 -- valid -- fringe-lipped bats, long-legged bats
  Macrophyllum Gray, 1838 -- valid -- Long-legged Bat
  Macropodidae Gray, 1821 -- valid -- kangaroos, wallabies
  Macropodinae Gray, 1821 -- valid
  Macropus dorsalis (Gray, 1837) -- valid -- Black-striped Wallaby
  Macrotus Gray, 1843 -- valid -- big-eared bats
  Macrotus waterhousii Gray, 1843 -- valid -- Murciélago-orejón mexicano, Waterhouse's Leaf-nosed Bat
  Macrotus waterhousii waterhousii Gray, 1843 -- valid
  Magnoculus bennetti (Gray in Griffiths, 1832) -- valid
  Makaira herscheli (Gray, 1838) -- invalid -- spearfish
  Makaira herschelii (Gray, 1838) -- invalid -- marlin, spearfish
  Malaclemys Gray, 1844 -- valid -- Diamondback Terrapins
  Malaclemys tuberculifera Gray, 1844 -- invalid
  Malacoptila G. R. Gray, 1841 -- valid
  Malayemys macrocephala (Gray, 1859) -- valid -- Malayan Snail-eating Turtle
  Malayotyphlops ruficaudus (Gray, 1845) -- valid -- Red-headed Worm Snake
  Malimbus nitens (J. E. Gray, 1831) -- valid -- Blue-billed Malimbe
  Malurus cyanocephalus bonapartii (G. R. Gray, 1859) -- valid
  Manidae Gray, 1821 -- valid
  Manis (Smutsia) Gray, 1865 -- valid
  Manis crassicaudata Gray, 1827 -- invalid -- Indian Pangolin
  Manouria Gray, 1854 -- valid -- Indochinese Tortoises
  Manouria fusca Gray, 1854 -- invalid
  Margarites J. E. Gray, 1847 -- valid
  Marisa Gray, 1824 -- valid
  Marmosa Gray, 1821 -- valid -- mouse opossums
  Marsenina J. E. Gray, 1850 -- valid
  Martes (Pekania) Gray, 1865 -- invalid
  Martes abietum Gray, 1865 -- invalid
  Martes americana abietinoides Gray, 1865 -- valid
  Martes japonica Gray, 1865 -- invalid
  Martes melanopus Gray, 1865 -- invalid
  Maticora lineata Gray in Gray and Hardwicke, 1835 -- invalid
  Mauremys Gray, 1869 -- valid -- Stripe-necked Turtles
  Mauremys nigricans (Gray, 1834) -- valid -- Chinese Red-necked Turtle, Red-necked Pond Turtle
  Mauremys reevesii (Gray, 1831) -- valid -- Chinese Three-keeled Pond Turtle, Reeves' Turtle
  Mauremys sinensis (Gray, 1834) -- valid -- Chinese Stripe-necked Turtle
  Mayrornis lessoni (G. R. Gray, 1846) -- valid -- Slaty Monarch
  Mayrornis lessoni lessoni (G. R. Gray, 1846) -- valid
  Mazama americana whitelyi (Gray, 1873) -- valid
  Mazama gouazoubira superciliaris (Gray, 1852) -- valid
  Meandrinidae Gray, 1847 -- valid
  Mecistops Gray, 1844 -- valid -- African Gavial, African Sharp-nosed Crocodile, African Slender-snouted Crocodile
  Mecistops bennettii Gray, 1844 -- invalid
  Megaera flavomaculatus Gray, 1842 -- invalid
  Megalaima G. R. Gray, 1842 -- invalid
  Meganeuron Gray, 1865 -- invalid
  Megapodius cumingii gilbertii G. R. Gray, 1862 -- valid
  Megapodius forstenii G. R. Gray, 1847 -- valid -- Forsten's Megapode
  Megapodius forstenii forstenii G. R. Gray, 1847 -- valid
  Megapodius freycinet quoyii G. R. Gray, 1862 -- valid
  Megapodius pritchardi Gray, 1864 -- invalid
  Megapodius pritchardii G. R. Gray, 1864 -- valid -- Tongan Megapode
  Megapodius reinwardt macgillivrayi G. R. Gray, 1862 -- valid
  Megapodius wallacei G. R. Gray, 1861 -- invalid
  Megaptera Gray, 1846 -- valid -- humpback whales
  Megaptera longipinna Gray, 1846 -- invalid
  Megaptera novaeangliae kuzira (Gray, 1850) -- invalid -- North Pacific Humpback whale
  Melaenornis G. R. Gray, 1840 -- valid
  Melanerpes lewis (G. R. Gray, 1849) -- valid -- Carpintero de Lewis, Lewis' Woodpecker, Lewis's Woodpecker
  Melanochelys Gray, 1869 -- valid -- Indian Black Turtles
  Melanodera xanthogramma (Gould & G. R. Gray, 1839) -- valid -- Yellow-bridled Finch
  Melanodera xanthogramma xanthogramma (Gould & G. R. Gray, 1839) -- valid
  Melanosuchus Gray, 1862 -- valid -- Black Caiman
  Meles chinensis Gray, 1868 -- invalid
  Meliarchus sclateri (G. R. Gray, 1870) -- valid -- Graceless Honeyeater, Makira Honeyeater, Méliphage de San Cristobal, Mielero de San Cristóbal
  Melidectes sclateri (G. R. Gray, 1870) -- invalid
  Melierax G. R. Gray, 1840 -- valid
  Melilestes megarhynchus (G. R. Gray, 1858) -- valid -- Long-billed Honeyeater, Méliphage à long bec, Mielero piquilargo
  Melilestes megarhynchus megarhynchus (G. R. Gray, 1858) -- valid
  Meliphaga versicolor sonoroides (G. R. Gray, 1862) -- invalid
  Melithaeidae Gray, 1870 -- valid
  Mellivorinae Gray, 1865 -- valid
  Mellivorini Gray, 1865 -- invalid
  Melogale moschata (Gray, 1831) -- valid -- Chinese Ferret-badger
  Melogale moschata moschata (Gray, 1831) -- valid
  Melophus lathami (J. E. Gray, 1831) -- invalid -- Crested Bunting
  Meminna Gray, 1836 -- invalid
  Menetes berdmorei mouhotei (Gray, 1861) -- valid
  Menetia Gray, 1845 -- valid
  Menetia greyii Gray, 1845 -- valid -- Common Dwarf Skink
  Menobranchus sayii Gray, 1825 -- invalid
  Meomeris Gray, 1847 -- invalid
  Mephitis mephitis varians Gray, 1837 -- valid
  Meridiastra gunnii (Gray, 1840) -- valid
  Meroles Gray, 1838 -- valid
  Mesalina Gray, 1838 -- valid
  Mesembriomys gouldii (Gray, 1843) -- valid -- Black-footed Mesembriomys
  Mesoclemmys Gray, 1873 -- valid
  Mesoclemmys raniceps (Gray, 1856) -- valid -- Amazon Toad-headed Turtle
  Mesodesmatidae Gray, 1839 -- valid
  Mesoplodon hectori (Gray, 1871) -- valid -- Hector's Beaked Whale
  Mesoplodon layardii (Gray, 1865) -- valid -- Layard's beaked whale, strap-toothed beaked whale, Strap-toothed Whale
  Mesoplodon longirostris Gray, 1873 -- invalid
  Mesoplodon traversii (Gray, 1874) -- valid -- baleine à bec de Travers, spade-tand spitssnuitdolfijn, Spade-toothed Whale, zifio de Travers
  Metania Gray, 1867 -- valid
  Metrodira Gray, 1840 -- valid
  Metrodira subulata Gray, 1840 -- valid
  Mico sericeus Gray, 1868 -- invalid
  Micrastur G. R. Gray, 1841 -- valid
  Microeca flavovirescens G. R. Gray, 1858 -- valid -- Olive Flyrobin
  Microeca flavovirescens flavovirescens G. R. Gray, 1858 -- valid
  Micronisus G. R. Gray, 1840 -- valid
  Micronomus norfolkensis (Gray, 1840) -- valid -- East Coast Free-tailed Bat
  Micronycteris Gray, 1866 -- valid -- big-eared bats
  Micronycteris (Micronycteris) Gray, 1866 -- valid -- dark-bellied big-eared bats
  Micronycteris megalotis (Gray, 1842) -- valid -- Little Big-eared Bat
  Micropia Gray, 1868 -- invalid
  Micropora Gray, 1848 -- valid
  Microporidae Gray, 1948 -- valid
  Micropus Gray, 1831 -- invalid
  Microsciurus flaviventer (Gray, 1867) -- valid -- Amazon Dwarf Squirrel
  Microsciurus flaviventer flaviventer (Gray, 1867) -- valid
  Milax Gray, 1855 -- valid
  Millardia meltada (Gray, 1837) -- valid -- Common Metad, Soft-furred Field Rat
  Milvus lineatus (J. E. Gray, 1831) -- invalid
  Milvus migrans lineatus (J. E. Gray, 1831) -- valid
  Mimon Gray, 1847 -- valid -- golden bats
  Mimon bennettii (Gray, 1838) -- valid -- Southern Golden Bat
  Miralia Gray, 1842 -- valid
  Mirounga Gray, 1827 -- valid -- elephant seals
  Mirza Gray, 1870 -- valid -- giant mouse lemurs
  Mithrodia Gray, 1840 -- valid
  Mithrodia spinulosa Gray, 1840 -- invalid
  Mocoa africana Gray, 1845 -- invalid
  Modiolaria niger J. E. Gray, 1824 -- invalid
  Modulus Gray, 1842 -- valid
  Mokopirirakau granulatus (Gray, 1845) -- valid
  Molge ocellata Gray, 1850 -- invalid
  Molge sinensis (Gray, 1859) -- invalid
  Molge vittata (Gray in Jenyns, 1835) -- invalid
  Molge vittatus (Gray in Jenyns, 1835) -- invalid
  Moloch Gray, 1841 -- valid
  Moloch horridus Gray, 1841 -- valid -- Thorny Devil
  Molossus australis Gray, 1839 -- invalid
  Molossus molossus tropidorhynchus Gray, 1839 -- invalid
  Molossus norfolkensis Gray, 1840 -- invalid
  Molossus tropidorhynchus Gray, 1839 -- invalid
  Monachammus Gray in Griffith, 1832 -- invalid
  Monachus tropicalis (Gray, 1850) -- invalid -- Caribbean Monk Seal, Foca-monje del Caribe, West Indian monk seal
  Monadenia fidelis (J. E. Gray, 1834) -- valid -- Pacific sideband
  Monarcha leucurus G. R. Gray, 1858 -- invalid -- White-tailed Monarch
  Monia Gray, 1850 -- valid
  Monodontidae Gray, 1821 -- valid -- white whales
  Monopeltis welwitschii (Gray, 1865) -- valid
  Monophyllus leachii Gray, 1844 -- invalid
  Monticola sharpei (G. R. Gray, 1871) -- valid -- Forest Rock Thrush
  Monticola sharpei sharpei (G. R. Gray, 1871) -- valid
  Montivipera xanthina (Gray, 1849) -- valid -- Coastal Viper, Ottoman Viper
  Mopalia Gray, 1847 -- valid
  Mopsella Gray, 1857 -- valid
  Mordacia Gray, 1851 -- valid
  Mordacia lapicida (Gray, 1851) -- valid -- Chilean lamprey, lamproie du Chili
  Morelia Gray, 1842 -- valid
  Morelia olivacea (Gray, 1842) -- invalid
  Morelia spilota variegata Gray, 1842 -- valid -- Darwin Carpet Python, Northwestern Carpet Python, Torresian Carpet Python
  Morenia Gray, 1870 -- valid -- Eyed Turtles
  Morethia Gray, 1845 -- valid
  Moringua Gray, 1831 -- valid
  Mormopterus norfolkensis (Gray, 1840) -- invalid -- East Coast Free-tailed Bat, Eastern Little Mastiff Bat, Norfolk Island Freetailed Bat
  Morus serrator (G. R. Gray, 1843) -- valid -- Australasian Gannet
  Moschidae Gray, 1821 -- valid -- musk deer
  Moschiola Gray, 1852 -- valid
  Mosia Gray, 1843 -- valid
  Mosia nigrescens Gray, 1843 -- valid -- Dark Sheath-tailed Bat, Lesser Sheath-tailed Bat
  Mosia nigrescens nigrescens Gray, 1843 -- valid
  Mulinia Gray, 1837 -- valid
  Muntiacus muntjak curvostylis (Gray, 1872) -- valid
  Murilemur Gray, 1870 -- invalid
  Murina Gray, 1842 -- valid
  Murina (Murina) Gray, 1842 -- invalid
  Mus adelaidensis Gray, 1841 -- invalid
  Mus affinis Gray, 1843 -- invalid
  Mus asiaticus Gray, 1837 -- invalid
  Mus booduga (Gray, 1837) -- valid -- Little Indian Field Mouse
  Mus greyii Gray, 1841 -- invalid
  Mus hardwickei Gray, 1837 -- invalid
  Mus kok Gray, 1837 -- invalid
  Mus macropus Gray, 1866 -- invalid
  Mus maura Gray, 1862 -- invalid
  Mus octomammis Gray, 1863 -- invalid
  Mus rufescens Gray, 1837 -- invalid
  Mus vellerosus Gray, 1847 -- invalid
  Musculus laevigatus Gray, 1824 -- invalid
  Musculus niger (J. E. Gray, 1824) -- valid -- black mussel
  Musculus substriata Gray, 1824 -- invalid
  Mustela frenata affinis Gray, 1874 -- valid
  Mustela frenata aureoventris Gray, 1864 -- valid
  Mustela frenata xanthogenys Gray, 1843 -- valid
  Mustela hodgsoni Gray, 1843 -- invalid
  Mustela horsfieldii Gray, 1843 -- invalid
  Mustela nudipes leucocephalus (Gray, 1865) -- valid
  Mustela sibirica hodgsoni Gray, 1843 -- valid
  Mustela strigidorsa Gray, 1853 -- valid -- Back-striped Weasel, Stripe-backed Weasel
  Mustela strigodorsa Gray, 1853 -- invalid
  Mustela xanthogenys Gray, 1843 -- invalid
  Mutelinae Gray, 1847 -- invalid
  Mycale Gray, 1867 -- valid
  Mycale (Aegogropila) Gray, 1867 -- valid
  Mycale (Carmia) Gray, 1867 -- valid
  Mycale (Grapelia) Gray, 1867 -- valid
  Mycale (Mycale) Gray, 1867 -- valid
  Mycale (Naviculina) Gray, 1867 -- valid
  Mycetes auratus Gray, 1845 -- invalid
  Mycetes bicolor Gray, 1845 -- invalid
  Mycetes laniger Gray, 1845 -- invalid
  Mycetes villosus Gray, 1845 -- invalid
  Mycetinae Gray, 1825 -- invalid
  Mycetopodidae Gray, 1840 -- valid
  Mycetopodinae Gray, 1840 -- valid
  Myiagra alecto lucida G. R. Gray, 1858 -- valid
  Myiagra alecto rufolateralis (G. R. Gray, 1858) -- valid
  Myiagra caledonica melanura G. R. Gray, 1860 -- valid
  Myiagra caledonica viridinitens G. R. Gray, 1859 -- valid
  Myiagra galeata G. R. Gray, 1861 -- valid -- Moluccan Flycatcher
  Myiagra galeata galeata G. R. Gray, 1861 -- valid
  Myiobatrachus Schlegel in Gray, 1850 -- invalid
  Myiobatrachus paradoxus (Schlegel in Gray, 1850) -- invalid
  Myiomela G. R. Gray, 1846 -- valid
  Myliusia Gray, 1859 -- valid
  Myobatrachidae Schlegel in Gray, 1850 -- valid -- Australian Frogs
  Myobatrachus Schlegel in Gray, 1850 -- valid
  Myobatrachus gouldii (Gray, 1841) -- valid
  Myobatrachus paradoxus Schlegel in Gray, 1850 -- invalid
  Myoictis Gray, 1858 -- valid -- New Guinea striped dasyures, three-striped marsupial 'mouse'
  Myoictis wallacii Gray, 1858 -- valid -- Wallace's Dasyure
  Myopa nigripennis Gray, 1832 -- invalid
  Myosidae Gray, 1821 -- invalid
  Myosorex Gray, 1838 -- valid
  Myotis muricola (Gray, 1846) -- valid -- Nepalese Whiskered Myotis, whiskered myotis
  Myotis muricola muricola (Gray, 1846) -- invalid
  Myotis welwitschii (Gray, 1866) -- valid -- Welwitch's bat, Welwitsch's Myotis
  Myoxidae Gray, 1821 -- invalid
  Myoxinae Gray, 1821 -- invalid
  Myrichthys acuminatus (Gronow in Gray, 1854) -- invalid -- sharptail eel
  Myrmeciza G. R. Gray, 1841 -- valid
  Myrmecophagidae Gray, 1825 -- valid -- American anteaters
  Myron Gray, 1849 -- valid
  Myron richardsonii Gray, 1849 -- valid -- Richardson's Mangrove Snake
  Myron trivittatus Gray, 1849 -- invalid
  Myrrophis bennettii (Gray, 1842) -- valid -- Bennett's Mud Snake
  Myrrophis chinensis (Gray, 1842) -- valid -- Chinese Mud Snake
  Mystacina Gray, 1843 -- valid -- New Zealand short-tailed bats
  Mystacina tuberculata Gray, 1843 -- valid -- Lesser New Zealand Short-tailed Bat, New Zealand Lesser Short-tailed Bat
  Mystax Gray, 1870 -- invalid
  Mytilia melanogaster Gray, 1858 -- invalid
  Myuchelys bellii (Gray, 1844) -- valid -- Bell's Sawshelled Turtle, Western Sawshelled Turtle
  Myuchelys latisternum (Gray, 1867) -- valid -- Common Sawshelled Turtle, Sawshelled Turtle
  Myzomela cardinalis chermesina G. R. Gray, 1846 -- invalid
  Myzomela chermesina G. R. Gray, 1846 -- valid -- Mielero de Rotuma, Myzomèle de Rotuma, Rotuma Myzomela
  Myzomela nigrita G. R. Gray, 1858 -- valid -- Black Myzomela, Mielero negro, Myzomèle noir, Papuan Black Myzomela
  Myzomela nigrita nigrita G. R. Gray, 1858 -- valid
  Myzomela obscura simplex G. R. Gray, 1861 -- invalid
  Myzomela simplex G. R. Gray, 1861 -- valid -- Moluccan Myzomela
  Myzomela simplex simplex G. R. Gray, 1861 -- valid
  Naemorhedus swinhoei (Gray, 1862) -- invalid -- Taiwan serow
  Naja australis Gray, 1842 -- invalid
  Nandinia Gray, 1843 -- valid
  Nandinia binotata (Gray, 1830) -- valid -- African Palm Civet
  Nandinia binotata binotata (Gray, 1830) -- valid
  Nandus nebulosus (Gray, 1835) -- valid
  Napothera G. R. Gray, 1842 -- valid
  Narcissia Gray, 1840 -- valid
  Narcissia teneriffae Gray, 1840 -- invalid
  Nardoa Gray, 1840 -- valid
  Nardoa agassizi Gray, 1840 -- invalid
  Nardoa tuberculata Gray, 1840 -- valid
  Narella Gray, 1870 -- valid
  Nasua nasua dorsalis Gray, 1866 -- valid
  Nasuella olivacea (Gray, 1865) -- valid -- Mountain Coati
  Nasuella olivacea olivacea (Gray, 1865) -- valid
  Natalidae Gray, 1866 -- valid -- funnel-eared bats
  Natalus Gray, 1838 -- valid
  Natalus stramineus Gray, 1838 -- valid -- Lesser Antillean Funnel-eared Bat, Mexican Funnel-eared Bat, Mexican Greater Funnel-eared Bat
  Natalus stramineus stramineus Gray, 1838 -- invalid
  Naultinus Gray, 1842 -- valid
  Naultinus elegans Gray, 1842 -- valid
  Naultinus punctatus Gray, 1843 -- valid
  Nauricia Gray, 1840 -- invalid
  Nauricia pulchella Gray, 1840 -- invalid
  Nectria Gray, 1840 -- valid
  Nectria oculifera Gray, 1840 -- invalid
  Neobalaena Gray, 1870 -- invalid
  Neobalaenidae Gray, 1873 -- valid -- pygmy right whales
  Neochmia G. R. Gray, 1849 -- valid
  Neofelis Gray, 1867 -- valid
  Neoferdina cumingi (Gray, 1840) -- valid
  Neolalage banksiana (G. R. Gray, 1870) -- valid -- Buff-bellied Monarch
  Neomeris Gray, 1846 -- invalid
  Neomonachus tropicalis (Gray, 1850) -- valid -- Caribbean monk seal, West Indian monk seal
  Neomorphus rufipennis (G. R. Gray, 1849) -- valid -- Rufous-winged Ground Cuckoo
  Neoorca Gray, 1871 -- invalid
  Neophoca Gray, 1866 -- valid
  Neotis denhami stanleyi (J. E. Gray, 1831) -- valid
  Neotoma (Teonoma) Gray, 1843 -- valid
  Nepanthia Gray, 1840 -- valid
  Nepanthia crassa (Gray, 1847) -- valid
  Nepanthia maculata Gray, 1840 -- valid
  Nepanthia tesselata Gray, 1840 -- invalid
  Neptunea heros (J. E. Gray, 1850) -- valid
  Neritellinae Gray, 1847 -- invalid
  Neritiliinae Gray, 1847 -- invalid
  Neritopsidae Gray, 1847 -- valid
  Nesokia Gray, 1842 -- valid -- Short-tailed Bandicoot Rats
  Nesokia indica (Gray, 1830) -- valid -- Short-tailed Bandicoot Rat, Short-tailed Nesokia
  Nessia Gray, 1839 -- valid
  Nessia burtonii Gray, 1839 -- valid -- Burton's Nessia
  Nessia monodactyla (Gray, 1839) -- valid -- One-toed Nessia
  Nicella Gray, 1870 -- valid
  Nicoria Gray, 1856 -- invalid
  Nidalia Gray, 1834 -- valid
  Nidalia occidentalis Gray, 1835 -- valid
  Nidorellia Gray, 1840 -- valid
  Nidorellia armata (Gray, 1840) -- valid
  Nidorellia horrida (Gray, 1840) -- invalid
  Nilssonia Gray, 1872 -- valid -- Burmese Peacock Softshell Turtles
  Nilssonia formosa (Gray, 1869) -- valid -- Burmese Peacock Softshell Turtle
  Nilssonia hurum (Gray, 1830) -- valid -- Indian Peacock Softshell Turtle
  Nilssonia leithii Gray, 1872 -- valid -- Leith's Softshell Turtle
  Ninox connivens rufostrigata (G. R. Gray, 1861) -- valid
  Ninox hypogramma (G. R. Gray, 1861) -- valid -- Halmahera Boobook
  Ninox squamipila hypogramma (G. R. Gray, 1861) -- invalid
  Niveoscincus ocellatus (Gray, 1845) -- invalid
  Niveria quadripunctata (J. E. Gray, 1827) -- valid -- fourspot trivia
  Niveria suffusa (J. E. Gray, 1827) -- valid -- pink trivia
  Niviventer fulvescens (Gray, 1847) -- valid -- Chestnut Rat, Indomalayan Niviventer
  Noctilionidae Gray, 1821 -- valid -- bulldog bats
  Noctilionoidea Gray, 1821 -- valid
  Noetia Gray, 1857 -- valid
  Notharchus macrorhynchos swainsoni (G. R. Gray, 1846) -- invalid
  Notharchus pectoralis (G. R. Gray, 1846) -- valid -- Black-breasted Puffbird
  Notharchus swainsoni (G. R. Gray, 1846) -- valid -- Buff-bellied Puffbird
  Nothocercus bonapartei (G. R. Gray, 1867) -- valid -- Highland Tinamou
  Nothocercus bonapartei bonapartei (G. R. Gray, 1867) -- valid
  Nothocercus nigrocapillus (G. R. Gray, 1867) -- valid -- Hooded Tinamou
  Nothocercus nigrocapillus nigrocapillus (G. R. Gray, 1867) -- valid
  Nothoprocta ornata (G. R. Gray, 1867) -- valid -- Ornate Tinamou
  Nothoprocta ornata ornata (G. R. Gray, 1867) -- valid
  Nothoprocta pentlandii (G. R. Gray, 1867) -- valid -- Andean Tinamou
  Nothoprocta pentlandii pentlandii (G. R. Gray, 1867) -- valid
  Nothura darwini G. R. Gray, 1867 -- invalid
  Nothura darwinii G. R. Gray, 1867 -- valid -- Darwin's Nothura
  Nothura darwinii darwinii G. R. Gray, 1867 -- valid
  Notoa Gray, 1863 -- invalid
  Notochelys Gray, 1863 -- valid -- Malayan Flat-shelled Turtles
  Notochelys platynota (Gray, 1834) -- valid -- Malayan Flat-shelled Turtle
  Notocyrtus dorsalis (Gray, 1832) -- valid
  Notopteris Gray, 1859 -- valid -- long-tailed fruit bats
  Notopteris macdonaldi Gray, 1859 -- invalid -- Fijian Long-tailed Fruit Bat, long-tailed fruit bat
  Notopteris macdonaldii Gray, 1859 -- valid -- Fijian Long-tailed Fruit Bat
  Nototodarus sloanii (Gray, 1849) -- valid
  Nucras Gray, 1838 -- valid
  Nucras ornata (Gray, 1864) -- valid -- Ornate Sandveld Lizard, Ornate Scrub Lizard
  Nuculidae Gray, 1824 -- valid
  Nutricola confusa (S. Gray, 1982) -- valid -- confusing dwarf-venus
  Nyctereutes procyonoides (Gray, 1834) -- valid -- Asiatic Raccoon, Raccoon dog, Tanuki
  Nyctereutes procyonoides procyonoides (Gray, 1834) -- valid
  Nycticeius greyii (Gray, 1843) -- invalid -- little broad-nosed bat
  Nyctimene albiventer (Gray, 1863) -- valid -- Common Tube-nosed Fruit Bat
  Nyctimene albiventer albiventer (Gray, 1863) -- valid
  Nyctinomops macrotis (Gray, 1840) -- valid -- Big Free-tailed Bat, Murciélago-cola suelta mayor
  Nyctinomus macrotis Gray, 1840 -- invalid
  Nyctinomus murinus Gray, 1827 -- invalid
  Nyctipithecus hirsutus Gray, 1870 -- invalid
  Nyctipithecus villosus Gray, 1847 -- invalid
  Nyctophilus geoffroyi pacificus Gray, 1831 -- valid
  Nyctophilus major Gray, 1844 -- valid -- Greater Long-eared Bat, Western Long-eared Bat
  Nyctophilus major major Gray, 1844 -- valid -- Western Long-eared Bat
  Nyctophilus timoriensis major Gray, 1844 -- invalid
  Ocadia Gray, 1870 -- invalid -- Chinese stripe-necked turtles, Striped-necked Turtles
  Ocadia sinensis (Gray, 1834) -- invalid -- Chinese stripe-necked turtle, Chinese Striped-necked Turtle
  Oceanodroma hornbyi (G. R. Gray, 1854) -- valid -- Hornby's Storm Petrel, Océanite de Hornby, Ringed Storm-Petrel
  Ocenebra Gray, 1847 -- valid
  Ochotona pallasi (Gray, 1867) -- valid -- Mongolian Pika, Pallas's Pika
  Ochotona pallasi pallasi (Gray, 1867) -- valid
  Ochotona rufescens (Gray, 1842) -- valid -- Afghan Pika, Collared Pika, Rufescent Pika
  Ochotona rufescens rufescens (Gray, 1842) -- valid
  Octolasmis Gray, 1825 -- valid
  Octopus aegina Gray, 1849 -- valid
  Octopus cassiopeia Gray, 1849 -- invalid
  Octopus cyanea Gray, 1849 -- valid
  Octopus favonia Gray, 1849 -- invalid
  Octopus favonius Gray, 1849 -- valid
  Octopus hardwickei Gray, 1849 -- valid
  Octopus ocellatus Gray, 1849 -- invalid
  Octopus polyzenia Gray, 1849 -- valid
  Oculinidae Gray, 1847 -- valid
  Ocyphaps G. R. Gray, 1842 -- valid
  Ocythoidae Gray, 1849 -- valid
  Odocoileus virginianus peruvianus (Gray, 1874) -- valid
  Odontaster paxillosus (Gray, 1847) -- invalid
  Oedipina vermicularis (Gray, 1868) -- invalid
  Oedipus bellii (Gray, 1850) -- invalid
  Oedipus carbonarius salvinii Gray, 1868 -- invalid
  Oedipus platydactylus (Gray, 1831) -- invalid
  Oedipus salvinii Gray, 1868 -- invalid
  Oedipus variegatus (Gray in Cuvier, 1831) -- invalid
  Oedipus variegatus salvinii Gray, 1868 -- invalid
  Oedura Gray, 1842 -- valid
  Oedura marmorata Gray, 1842 -- valid
  Oedura rhombifer Gray, 1845 -- valid
  Ogotoma pallasi Gray, 1867 -- invalid
  Oligodon dorsalis (Gray and Hardwicke, 1835) -- valid -- Bengalese Kukri Snake, Gray's Kukri Snake
  Oligosoma grande (Gray, 1845) -- valid -- Grand Skink
  Oligosoma ornatum (Gray, 1843) -- valid -- Gray's Ornate Skink
  Oligosoma smithi (Gray, 1845) -- valid -- Shore Skink
  Oligosoma zelandicum (Gray, 1843) -- valid -- Brown Skink
  Olivella semistriata (Gray, 1839) -- valid
  Ommastrephes (Hyaloteuthis) Gray, 1849 -- invalid
  Ommastrephes sloanii Gray, 1849 -- invalid
  Ommatophoca Gray, 1844 -- valid
  Ommatophoca rossii Gray, 1844 -- valid -- bigeyed seal, Ross Seal
  Ommatotriton Gray, 1850 -- valid
  Ommatotriton vittatus (Gray in Jenyns, 1835) -- valid
  Onchidella Gray, 1850 -- valid
  Onchidiidae Gray, 1824 -- valid
  Onchidorididae Gray, 1854 -- valid
  Ondatrini Gray, 1825 -- invalid
  Onithochiton Gray, 1847 -- valid
  Onychochelys Gray, 1873 -- invalid
  Onychochelys kraussi Gray, 1873 -- invalid
  Onychogalea Gray, 1841 -- valid -- nail-tailed wallabies
  Onychophis cumingii Gray, 1845 -- invalid
  Onychophis olivaceus Gray, 1845 -- invalid
  Onychoteuthidae Gray, 1847 -- valid
  Onychotria Gray, 1849 -- invalid
  Oopholis pondicherianus Gray, 1862 -- invalid
  Opheobatrachus Gray, 1868 -- invalid
  Opheobatrachus vermicularis Gray, 1868 -- invalid
  Ophidiaster (Hacelia) Gray, 1840 -- invalid
  Ophidiaster (Pharia) Gray, 1840 -- invalid
  Ophidiaster attenuatus Gray, 1840 -- invalid
  Ophidiaster aurantius Gray, 1840 -- invalid
  Ophidiaster columbiae (Gray, 1840) -- invalid
  Ophidiaster crassa (Gray, 1840) -- invalid
  Ophidiaster fuscus (Gray, 1840) -- invalid
  Ophidiaster guildingi Gray, 1840 -- valid -- Guilding's star
  Ophidiaster guildingii Gray, 1840 -- invalid
  Ophidiaster leachi Gray, 1840 -- invalid
  Ophidiaster pacifica (Gray, 1840) -- invalid
  Ophidiaster pyramidatus Gray, 1840 -- invalid
  Ophidiaster tuberculatus (Gray, 1840) -- invalid
  Ophiobatrachus Gray, 1868 -- invalid
  Ophiobatrachus vermicularis Gray, 1868 -- invalid
  Ophiuroidea Gray, 1840 -- valid -- basket stars, basket stars, brittle stars, brittlestars, brittlestars, ofiúro, ophiures, serpente do mar, snake stars, snake stars
  Ophrysia superciliosa (J. E. Gray, 1846) -- valid -- Himalayan Quail
  Ophysia Gray, 1868 -- invalid
  Opisthodon ornatus (Gray, 1842) -- invalid
  Oplurus cuvieri (Gray, 1831) -- valid -- Cuvier's Madagascar Swift
  Oplurus cuvieri cuvieri (Gray, 1831) -- valid
  Opolemur Gray, 1873 -- invalid
  Orca Gray, 1846 -- invalid
  Orca brevirostris Owen in Gray, 1866 -- invalid
  Orca capensis Gray, 1846 -- invalid
  Orcaella Gray, 1866 -- valid
  Orcaella brevirostris (Owen in Gray, 1866) -- valid -- Irrawaddy Dolphin, Irrawady Dolphin, pesut
  Orcaella fluminalis Anderson in Gray, 1871 -- invalid
  Oreaster aculeatus (Gray, 1840) -- invalid
  Oreaster armatus (Gray, 1840) -- invalid
  Oreaster franklini (Gray, 1840) -- invalid
  Oreaster granulosus (Gray, 1847) -- invalid
  Oreaster muricatus (Gray, 1840) -- invalid
  Oreaster turritus (Gray, 1840) -- invalid
  Oreophasis G. R. Gray, 1844 -- valid
  Oreophasis derbianus G. R. Gray, 1844 -- valid -- Horned Guan, Pavón
  Orina Gray, 1867 -- valid
  Oriolus phaeochromus G. R. Gray, 1861 -- valid -- Dusky-brown Oriole
  Orlitia Gray, 1873 -- valid -- Malaysian Giant Turtles
  Orlitia borneensis Gray, 1873 -- valid -- Malaysian Giant Turtle
  Ornithorhynchidae Gray, 1825 -- valid
  Ortalis cienericeps G. R. Gray, 1867 -- invalid
  Ortalis cinereiceps G. R. Gray, 1867 -- valid -- Gray-headed Chachalaca, Grey-headed Chachalaca
  Ortalis superciliaris G. R. Gray, 1867 -- valid -- Buff-browed Chachalaca
  Ortalis wagleri G. R. Gray, 1867 -- valid -- Chachalaca vientre castaño, Rufous-bellied Chachalaca
  Orthonychidae G. R. Gray, 1840 -- valid
  Orthragoriscus lunaris Gronow in Gray, 1854 -- invalid
  Orthragoriscus solaris Gronow in Gray, 1854 -- invalid
  Orycteropodidae Gray, 1821 -- valid
  Oscaria Gray, 1873 -- invalid
  Ostracion (Aracana) Gray, 1838 -- invalid
  Ostracion flavigaster Gray, 1838 -- invalid
  Ostracion lineata Gray, 1838 -- invalid
  Ostracion ornata Gray, 1838 -- invalid
  Otariidae Gray, 1825 -- valid -- eared seals, sea lions
  Otariinae Gray, 1825 -- invalid
  Othelosoma Gray, 1869 -- valid
  Othelosoma symondsii Gray, 1869 -- valid
  Otina Gray, 1847 -- valid
  Otogale Gray, 1863 -- invalid
  Otolemur crassicaudatus kirkii (Gray, 1865) -- valid -- Tanganyika Large-eared Galago
  Otolemur crassicaudatus monteiri (Bartlett in Gray, 1863) -- valid -- Miombo Silver Galago, Silvery Greater Galago
  Otolemur monteiri (Bartlett in Gray, 1863) -- invalid -- Silvery Greater Galago
  Otosaurus Gray, 1845 -- valid
  Otosaurus cumingii Gray, 1845 -- valid -- Cuming's Sphenomorphus
  Otothrix hodgsoni G. R. Gray, 1859 -- invalid
  Otus magicus leucospilus (G. R. Gray, 1861) -- valid
  Ouakaria Gray, 1849 -- invalid
  Ouakaria spixii Gray, 1849 -- invalid
  Pachycephala caledonica chlorura G. R. Gray, 1860 -- valid
  Pachycephala caledonica cucullata (G. R. Gray, 1860) -- valid
  Pachycephala griseiceps G. R. Gray, 1858 -- invalid
  Pachycephala griseonota G. R. Gray, 1862 -- valid -- Drab Whistler
  Pachycephala griseonota griseonota G. R. Gray, 1862 -- valid
  Pachycephala monacha G. R. Gray, 1858 -- valid -- Black-headed Whistler
  Pachycephala monacha monacha G. R. Gray, 1858 -- valid
  Pachycephala simplex griseiceps G. R. Gray, 1858 -- valid
  Pachycephala simplex rufipennis G. R. Gray, 1858 -- valid
  Pachycephala vitiensis G. R. Gray, 1860 -- valid
  Pachycephala vitiensis vitiensis G. R. Gray, 1860 -- valid
  Pachydactylus maculatus Gray, 1845 -- valid
  Pachyramphus G. R. Gray, 1840 -- valid -- Becards
  Pagophilus Gray, 1844 -- valid
  Paguma Gray, 1831 -- valid
  Paguma larvata jourdanii (J. E. Gray, 1837) -- valid
  Paguma larvata leucomystax (J. E. Gray, 1837) -- valid
  Paleosuchus Gray, 1862 -- valid -- musky caimans, smooth-fronted caimans
  Palio Gray, 1857 -- valid
  Palola Gray, 1847 -- valid
  Pampusana stairi (G. R. Gray, 1856) -- valid -- Tongan Ground Dove
  Pan troglodytes vellerosus (Gray, 1862) -- invalid
  Panaspis africana (Gray, 1845) -- valid -- Guinea Lidless Skink
  Pangshura Gray, 1856 -- valid
  Pangshura dura Gray, 1869 -- invalid
  Pangshura leithii Gray, 1870 -- invalid
  Pangshura smithii (Gray, 1863) -- valid -- Brown Roofed Turtle
  Pangshura smithii smithii (Gray, 1863) -- valid -- Brown Roofed Turtle
  Pangshura tecta (Gray, 1830) -- valid -- Indian Roofed Turtle
  Pangshura tentoria (Gray, 1834) -- valid -- Indian Tent Turtle
  Pangshura tentoria tentoria (Gray, 1834) -- valid -- Indian Tent Turtle
  Pangshura ventricosa Gray, 1870 -- invalid
  Panomya Gray, 1857 -- valid
  Panorpa rufa Gray, 1832 -- valid
  Panthera onca hernandesii (J. E. Gray, 1857) -- valid -- West Mexican Jaguar
  Panthera pardus japonensis (J. E. Gray, 1862) -- valid
  Papilio astyalus pallas G. Gray, 1853 -- valid
  Papyridea semisulcata (J. E. Gray, 1825) -- valid -- frilled papercockle
  Paradoxornis gularis G. R. Gray, 1845 -- invalid -- Grey-headed Parrotbill
  Paradoxurinae Gray, 1865 -- valid
  Paradoxurus hermaphroditus pallasii Gray, 1832 -- valid
  Paramesotriton chinensis (Gray, 1859) -- valid
  Paramesotriton chinensis chinensis (Gray, 1859) -- invalid
  Paranepanthia crassa (Gray, 1847) -- invalid
  Parantechinus apicalis (Gray, 1842) -- valid -- Dibbler, Southern Dibbler
  Parasuta gouldii (Gray, 1841) -- valid -- Black-headed Snake, Gould's Hooded Snake
  Paraxerus cepate (Gray, 1843) -- invalid
  Paraxerus palliatus frerei (Gray, 1873) -- valid
  Paraxerus palliatus ornatus (Gray, 1864) -- valid
  Pardofelis marmorata charltonii (Gray, 1846) -- valid
  Pasimachus mexicanus Gray, 1832 -- valid
  Patagona G. R. Gray, 1840 -- valid
  Patina Gray, 1840 -- valid
  Patiria Gray, 1840 -- valid
  Patiria coccinea Gray, 1840 -- invalid
  Patiria crassa Gray, 1847 -- invalid
  Patiria granifera Gray, 1847 -- invalid
  Patiria obtusa Gray, 1847 -- invalid
  Patiria ocellifera Gray, 1847 -- invalid
  Patiriella gunni (Gray, 1840) -- invalid
  Paulia Gray, 1840 -- valid
  Paulia horrida Gray, 1840 -- valid
  Peasea reticulata (Gray, 1860) -- invalid
  Peasia Gray and Pease, 1860 -- invalid
  Peasia reticulata Gray, 1860 -- invalid
  Pectoglossa persimilis (Gray, 1859) -- invalid
  Pedestes Gray, 1843 -- invalid
  Pedetidae Gray, 1825 -- valid -- Spring Hares
  Pedioplanis lineoocellata pulchella (Gray, 1845) -- valid -- Common Sand Lizard
  Pekania Gray, 1865 -- valid -- Fisher
  Pelea Gray, 1851 -- valid
  Pelecanoididae G. R. Gray, 1871 -- valid -- Diving Petrels
  Peleinae Gray, 1872 -- invalid
  Pelochelys Gray, 1864 -- valid -- Asian Giant Softshell Turtles
  Pelochelys cantorii Gray, 1864 -- valid -- Asian Giant Softshell Turtle, Cantor's Giant Softshell Turtle
  Pelodytes affinis Gray, 1842 -- invalid
  Pelodytes nasutus Gray, 1842 -- invalid
  Pelomedusa nigra Gray, 1863 -- invalid
  Peltocephalidae Gray, 1870 -- invalid
  Peltonia Gray, 1872 -- invalid
  Penares Gray, 1867 -- valid
  Penelope montagnii sclateri G. R. Gray, 1860 -- valid
  Penelope obscura bridgesi G. R. Gray, 1860 -- valid
  Pentaceraster chinensis (Gray, 1840) -- valid
  Pentaceraster cumingi (Gray, 1840) -- valid
  Pentaceraster horridus (Gray, 1840) -- valid
  Pentaceros Gray, 1840 -- invalid
  Pentaceros aculeatus Gray, 1840 -- invalid
  Pentaceros armatus Gray, 1840 -- invalid
  Pentaceros chinensis Gray, 1840 -- invalid
  Pentaceros cumingi Gray, 1840 -- invalid
  Pentaceros franklini Gray, 1840 -- invalid
  Pentaceros gibbus Gray, 1840 -- invalid
  Pentaceros grandis Gray, 1840 -- invalid
  Pentaceros granulosus Gray, 1847 -- invalid
  Pentaceros horridus Gray, 1840 -- invalid
  Pentaceros modestus Gray, 1866 -- invalid
  Pentaceros muricatus Gray, 1840 -- invalid
  Pentaceros turritus Gray, 1840 -- invalid
  Pentagonaster Gray, 1840 -- valid
  Pentagonaster abnormalis Gray, 1866 -- invalid
  Pentagonaster auratus (Gray, 1847) -- invalid
  Pentagonaster australis (Gray, 1840) -- invalid
  Pentagonaster belcheri (Gray, 1847) -- invalid
  Pentagonaster childreni (Gray, 1840) -- invalid
  Pentagonaster duebeni Gray, 1847 -- valid
  Pentagonaster emma (Gray, 1847) -- invalid
  Pentagonaster grandis (Gray, 1847) -- invalid
  Pentagonaster inaequalis (Gray, 1847) -- invalid
  Pentagonaster incei (Gray, 1847) -- invalid
  Pentagonaster miliaris (Gray, 1847) -- invalid
  Pentagonaster paxillosus (Gray, 1847) -- invalid
  Pentagonaster pulchellus Gray, 1840 -- valid
  Pentagonaster spinulosus (Gray, 1847) -- invalid
  Pentagonaster tubercularis (Gray, 1847) -- invalid
  Peponocephala electra (Gray, 1846) -- valid -- Calderón, electra dolphin, Melon-headed Whale
  Perameles gunnii Gray, 1838 -- valid -- Eastern Barred Bandicoot
  Peramelidae Gray, 1825 -- valid -- bandicoots
  Peramelinae Gray, 1825 -- valid
  Perialia Gray, 1845 -- invalid
  Perialia eyrei Gray, 1845 -- invalid
  Perialia ornata (Gray, 1842) -- invalid
  Periglypta listeri (J. E. Gray, 1838) -- valid -- princess venus
  Perodicticinae Gray, 1870 -- valid
  Perognathus parvus lordi (Gray, 1868) -- valid
  Perqualus Gray, 1846 -- invalid
  Petalaster Gray, 1840 -- invalid
  Petalaster columbia Gray, 1840 -- invalid
  Petalaster hardwicki Gray, 1840 -- invalid
  Petalifera Gray, 1847 -- valid
  Petaurista caniceps (Gray, 1842) -- valid -- Gray-headed Flying Squirrel
  Petaurista elegans caniceps (Gray, 1842) -- invalid
  Petaurista elegans punctatus (Gray, 1846) -- valid
  Petaurista nobilis (Gray, 1842) -- valid -- Bhutan Giant Flying Squirrel
  Petaurista nobilis nobilis (Gray, 1842) -- valid
  Petaurista petaurista albiventer (Gray, 1834) -- valid
  Petaurista petaurista melanotus (Gray, 1837) -- valid
  Petricia Gray, 1847 -- valid
  Petricia punctata Gray, 1847 -- invalid
  Petrogale Gray, 1837 -- valid -- rock wallabies
  Petrogale penicillata (Gray, 1827) -- valid -- brush-tailed rock wallaby, Brush-tailed Rock-wallaby
  Petrogale xanthopus Gray, 1854 -- valid -- Yellow-footed Rock-wallaby
  Petrogale xanthopus xanthopus Gray, 1854 -- valid
  Petroica multicolor similis G. R. Gray, 1860 -- valid
  Petrolisthes politus (Gray, 1831) -- valid -- redback porcelain crab
  Petrorhynchus Gray, 1875 -- invalid
  Phacochaeres Gray, 1821 -- invalid
  Phacochoerinae Gray, 1868 -- invalid
  Phacochoerini Gray, 1868 -- valid
  Phalacrocorax chalconotus (G. R. Gray, 1845) -- invalid
  Phalanger ornatus (Gray, 1860) -- valid -- Ornate Cuscus
  Phaner Gray, 1870 -- valid -- fork-marked lemurs
  Pharia Gray, 1840 -- valid
  Pharia pyramidata (Gray, 1840) -- valid
  Phascolosoma arcuatum (Gray, 1828) -- valid
  Phascolosoma arcuatum arcuatum (Gray, 1828) -- invalid
  Phataria Gray, 1840 -- valid
  Phataria bifascialis (Gray, 1840) -- invalid
  Phataria unifascialis (Gray, 1840) -- valid
  Phegornis G. R. Gray, 1846 -- valid
  Phelsuma Gray, 1825 -- valid -- Day Geckos
  Phelsuma grandis Gray, 1870 -- valid
  Phelsuma lineata Gray, 1842 -- valid
  Phelsuma madagascarensis (Gray, 1831) -- invalid -- Madagascar Giant Day Gecko
  Phelsuma madagascariensis (Gray, 1831) -- valid -- Madagascar Day Gecko, Madagascar Giant Day Gecko
  Phelsuma ornata Gray, 1825 -- valid
  Pheronematidae Gray, 1870 -- valid
  Phidiana Gray, 1850 -- valid
  Phigys G. R. Gray, 1870 -- valid
  Philantomba monticola bicolor (Gray, 1863) -- valid
  Philantomba monticola melanorheus (Gray, 1846) -- valid
  Philemon inornatus (G. R. Gray, 1846) -- valid -- Filemón de Timor, Polochion sobre, Timor Friarbird
  Philemon moluccensis plumigenis (G. R. Gray, 1858) -- invalid
  Philemon plumigenis (G. R. Gray, 1858) -- valid -- Filemón de las Tanimbar, Polochion des Tanimbar, Tanimbar Friarbird
  Philemon sclateri G. R. Gray, 1870 -- invalid
  Philinidae Gray, 1850 -- valid
  Philippia J. E. Gray, 1847 -- valid
  Philohela G. R. Gray, 1841 -- invalid
  Phoca tropicalis Gray, 1850 -- invalid
  Phoca vitulina richardii (Gray, 1864) -- valid -- Pacific harbor seal
  Phoca vitulina richardsi (Gray, 1864) -- invalid
  Phocaena Gray, 1828 -- invalid
  Phocarctos hookeri (Gray, 1844) -- valid -- Auckland sea lion, Hooker's sea lion, New Zealand sea lion, New Zealand Sealion
  Phocena Gray, 1821 -- invalid
  Phocidae Gray, 1821 -- valid -- earless seals, true seals
  Phocoenidae Gray, 1825 -- valid -- porpoises
  Phoenicolacerta laevis (Gray, 1838) -- valid -- Lebanon Lizard
  Phoeniconaias G. R. Gray, 1869 -- valid
  Phoenicurus schisticeps (J. E. Gray & G. R. Gray, 1847) -- valid -- White-throated Redstart
  Pholadomyacea Gray, 1847 -- invalid
  Pholadomyidae Gray, 1847 -- valid
  Pholidoscelis dorsalis (Gray, 1838) -- valid
  Pholidotus africanus Gray, 1865 -- invalid
  Pholidotus indicus Gray, 1865 -- invalid
  Phonygammus keraudrenii gouldii (G. R. Gray, 1859) -- valid
  Phractops australis (Gray, 1842) -- invalid
  Phryganoporus davidleei Gray, 2002 -- valid
  Phryganoporus melanopygus Gray, 2002 -- valid
  Phryganoporus vandiemeni (Gray, 1983) -- valid
  Phryniscus australis (Gray, 1835) -- invalid
  Phrynops raniceps (Gray, 1856) -- invalid -- Amazon toad-headed turtle
  Phrynosoma blainvillii Gray, 1839 -- valid -- Coast Horned Lizard, San Diego Horned Lizard
  Phrynosoma coronatum blainvillii Gray, 1839 -- invalid -- San Diego Horned Lizard
  Phrynosoma solare Gray, 1845 -- valid -- Lagartija-cornuda real, Regal Horned Lizard
  Phyllodactylus Gray, 1828 -- valid -- Leaf-toed Geckos
  Phyllodactylus pulcher Gray, 1830 -- valid
  Phyllodia parnellii Gray, 1843 -- invalid
  Phyllophora megalotis Gray, 1842 -- invalid
  Phyllops falcatus (Gray, 1839) -- valid -- Cuban Fig-eating Bat
  Phyllops falcatus falcatus (Gray, 1839) -- valid
  Phylloscopus chloronotus (J. E. Gray & G. R. Gray, 1847) -- valid -- Lemon-rumped Warbler
  Phylloscopus chloronotus chloronotus (J. E. Gray & G. R. Gray, 1847) -- valid
  Phylloscopus xanthoschistos (J. E. Gray & G. R. Gray, 1847) -- valid
  Phylloscopus xanthoschistos xanthoschistos (J. E. Gray & G. R. Gray, 1847) -- valid
  Phyllostoma bennettii Gray, 1838 -- invalid
  Phyllostomidae Gray, 1825 -- valid -- New World leaf-nosed bats
  Phyllostominae Gray, 1825 -- valid
  Phyllostomini Gray, 1825 -- valid -- leaf-nosed bats
  Phymata fasciata (Gray, 1832) -- valid
  Phymata fasciata fasciata (Gray, 1832) -- valid
  Physalus sibbaldii Gray, 1847 -- invalid
  Physeter australis Gray, 1846 -- invalid
  Physeteridae Gray, 1821 -- valid -- sperm whales
  Phytolopsis Gray, 1849 -- valid
  Phytolopsis punctata Gray, 1849 -- valid -- Blackwater Mud Snake
  Picus xanthopygaeus (J. E. Gray & G. R. Gray, 1847) -- valid -- Streak-throated Woodpecker
  Piliocolobus kirkii (Gray, 1868) -- valid -- Zanzibar Red Colobus
  Pillara Gray & Smith, 2004 -- valid
  Pillara coolahensis Gray & Smith, 2004 -- valid
  Pillara griswoldi Gray & Smith, 2004 -- valid
  Pillara karuah Gray & Smith, 2004 -- valid
  Pillara macleayensis Gray & Smith, 2004 -- valid
  Pione Gray, 1867 -- valid
  Pipidae Gray, 1825 -- valid -- Tongueless Frogs
  Pipilo maculatus socorroensis Grayson, 1867 -- valid
  Pipinae Gray, 1825 -- invalid
  Pipistrellus coromandra (Gray, 1838) -- valid -- Coromandel Pipistrelle, Indian Pipistrelle, Little Indian Bat
  Pipistrellus javanicus (Gray, 1838) -- valid -- Java Pipistrelle, Javan Pipistrelle
  Pipistrellus javanicus javanicus (Gray, 1838) -- valid
  Piranga rubriceps G. R. Gray, 1844 -- valid -- Red-hooded Tanager
  Pisidiidae Gray, 1857 -- valid -- peaclams
  Pithecia albicans Gray, 1860 -- valid -- Buffy Saki, White-footed Saki
  Pithecia irrorata Gray, 1842 -- valid -- Gray Monk Saki, Gray's Bald-faced Saki, Rio Tapajos Saki
  Pithecia irrorata irrorata Gray, 1842 -- invalid -- Gray's Bald-faced Saki
  Pithecia pogonias Gray, 1842 -- invalid
  Pitohui cerviniventris (G. R. Gray, 1862) -- valid
  Pitohui cerviniventris cerviniventris (G. R. Gray, 1862) -- valid
  Pitohui uropygialis (G. R. Gray, 1862) -- valid
  Pitohui uropygialis uropygialis (G. R. Gray, 1862) -- valid
  Pitta erythrogaster cyanonota G. R. Gray, 1861 -- valid
  Placospongia Gray, 1867 -- valid
  Placospongiidae Gray, 1867 -- valid
  Plagusia abbreviata Gray, 1834 -- invalid
  Planaxidae Gray, 1850 -- valid
  Planiceros Gray, 1872 -- invalid
  Plasterias Gray, 1871 -- invalid
  Plasterias latiradiata Gray, 1871 -- invalid
  Platanistidae Gray, 1846 -- valid -- river dolphins
  Platasterias Gray, 1871 -- invalid
  Platasterias latiradiata Gray, 1871 -- invalid
  Platessa chinensis Gray, 1834 -- invalid
  Platessa russellii Gray, 1834 -- invalid
  Platyceps ventromaculatus (Gray, 1834) -- valid -- Glossy-bellied Racer, Hardwicke's Rat Snake
  Platyceps ventromaculatus ventromaculatus (Gray, 1834) -- valid
  Platylepas Gray, 1825 -- valid
  Platynus balesi (Gray, 1937) -- invalid
  Platynus lanei (Gray, 1937) -- invalid
  Platyplectron ornatus (Gray, 1842) -- invalid
  Platyplectrum dorsalis (Gray, 1841) -- invalid
  Platyplectrum ornatum (Gray, 1842) -- valid
  Platysternidae Gray, 1869 -- valid -- Big-headed Turtles
  Platysternon Gray, 1831 -- valid -- Big-headed Turtles
  Platysternon megacephalum Gray, 1831 -- valid -- Big-headed Turtle
  Platysternon megacephalum megacephalum Gray, 1831 -- valid -- Chinese Big-headed Turtle
  Platysternon megacephalum peguense Gray, 1870 -- valid -- Burmese Big-headed Turtle
  Plaxiphora Gray, 1847 -- valid
  Plecotini Gray, 1866 -- valid -- long-eared bats
  Plecotus austriacus christii Gray, 1838 -- invalid
  Plecotus christiei Gray, 1838 -- invalid
  Plecotus christii Gray, 1838 -- valid -- Christie's Long-eared Bat
  Plecturocebus ornatus (Gray, 1866) -- valid -- Ornate Titi
  Plestiodon chinensis (Gray, 1838) -- valid -- Chinese Blue-tailed Skink
  Plestiodon chinensis chinensis (Gray, 1838) -- valid
  Plestiodon lynxe bellii Gray, 1845 -- valid
  Plethodon eschscholtzii (Gray, 1850) -- invalid
  Plethodon persimilis Gray, 1859 -- invalid
  Plethodontidae Gray, 1850 -- valid -- Lungless Salamanders
  Plethodontinae Gray, 1850 -- valid -- Plethodontine Salamanders
  Plexauridae Gray, 1859 -- valid
  Plica Gray, 1831 -- valid
  Ploceus grandis (G. R. Gray, 1844) -- valid -- Giant Weaver
  Plumarella Gray, 1870 -- valid
  Pluvianellus G. R. Gray, 1846 -- valid
  Pluvianellus socialis G. R. Gray, 1846 -- valid -- Magellanic Plover
  Pocilloporidae Gray, 1842 -- valid
  Podargus auritus J. E. Gray, 1829 -- invalid
  Podiceps rufopectus G. R. Gray, 1843 -- invalid
  Podiceps tricolor G. R. Gray, 1861 -- invalid
  Pododesmus cepio (J. E. Gray, 1850) -- invalid -- pacific false jingle
  Pododesmus pernoides (J. E. Gray, 1853) -- valid -- brown falsejingle, pedestal falsejingle
  Poecilodryas hypoleuca (G. R. Gray, 1859) -- valid -- Black-sided Robin
  Poecilodryas hypoleuca hypoleuca (G. R. Gray, 1859) -- valid
  Poecilogale albinucha (Gray, 1864) -- valid -- African Striped Weasel
  Poecilogale albinucha albinucha (Gray, 1864) -- valid
  Poescopia Gray, 1864 -- invalid
  Poiana Gray, 1865 -- valid
  Poicephalus ruepellii (G. R. Gray, 1849) -- invalid
  Poicephalus rueppellii (G. R. Gray, 1849) -- valid -- Rüppell's Parrot
  Polinices helicoides (Gray, 1825) -- valid
  Poliocephalus rufopectus (G. R. Gray, 1843) -- valid -- New Zealand Grebe
  Pollia J. E. Gray, 1834 -- valid
  Polyaster Gray, 1840 -- invalid
  Polymastiidae Gray, 1867 -- valid
  Polypedates maculatus (Gray, 1830) -- valid
  Pomacanthus resimus (Gronow in Gray, 1854) -- invalid
  Pomaulax Gray, 1850 -- valid
  Pontoporia Gray, 1846 -- valid
  Pontoporiidae Gray, 1870 -- valid
  Porania Gray, 1840 -- valid
  Porania (Porania) Gray, 1840 -- valid
  Porania gibbosa Leach in Gray, 1840 -- invalid
  Porella Gray, 1848 -- valid
  Porella Gray, 1848 -- invalid
  Poritidae Gray, 1842 -- valid
  Portlandia arctica (J. E. Gray, 1824) -- valid -- arctic nutclam, Arctic yoldia
  Portlandia glacialis (Gray, 1828) -- valid
  Porzana pusilla affinis (G. R. Gray, 1845) -- valid
  Potamochelys microcephalus Gray, 1864 -- invalid
  Potamochoerini Gray, 1873 -- valid
  Potamochoerus Gray, 1854 -- valid -- African bushpigs
  Potamopyrgus antipodarum (J. E. Gray, 1853) -- valid -- New Zealand mud snail
  Poteria Gray, 1850 -- valid
  Potoroidae Gray, 1821 -- valid
  Presbytinae Gray, 1825 -- invalid
  Presbytini Gray, 1825 -- valid -- Asian colobines
  Prianos Gray, 1867 -- valid
  Primnoella Gray, 1858 -- valid
  Primnoella australasiae (Gray, 1849) -- valid
  Prionailurus bengalensis chinensis (Gray, 1837) -- valid
  Prionailurus bengalensis horsfieldii (Gray, 1842) -- valid
  Prionops retzii tricolor G. R. Gray, 1864 -- valid
  Priotelus G. R. Gray, 1840 -- valid
  Pristurus carteri (Gray, 1863) -- valid
  Procavia capensis welwitschii (Gray, 1868) -- valid
  Procellaria parkinsoni G. R. Gray, 1862 -- valid -- Black Petrel, Parkinson's Petrel, Petrel de Parkinson, Puffin de Parkinson
  Procyon lotor psora Gray, 1842 -- valid
  Procyonidae Gray, 1825 -- valid -- procyonids
  Procyoninae Gray, 1825 -- invalid
  Progradungula Forster & Gray, 1979 -- valid
  Progradungula carraiensis Forster & Gray, 1979 -- valid
  Prolemur Gray, 1870 -- valid -- Greater Bamboo Lemur
  Prolemur simus (Gray, 1870) -- valid -- Greater Bamboo Lemur
  Propithecus bicolor Gray, 1872 -- invalid
  Propithecus damonis Gray, 1870 -- invalid
  Prosimia melanocephala Gray, 1863 -- invalid
  Prosimia rufipes Gray, 1871 -- invalid
  Prosimia xanthomystax Gray, 1863 -- invalid
  Prosopeia personata (G. R. Gray, 1848) -- valid -- Masked Shining Parrot
  Prosthemadera G. R. Gray, 1840 -- valid
  Prosymna Gray, 1849 -- valid
  Proteidae Gray, 1825 -- invalid -- Mudpuppies, Olms, Waterdogs
  Protobothrops elegans (Gray, 1849) -- valid -- Elegant Pitviper
  Protoxerus aubinnii (Gray, 1873) -- valid -- Slender-tailed Squirrel
  Protoxerus aubinnii aubinnii (Gray, 1873) -- valid
  Psammophilus dorsalis (Gray in Griffith and Pidgeon, 1831) -- valid -- Peninsular Rock Agama, South Indian Rock Agama
  Psammophis collaris Gray, 1853 -- invalid
  Psammoseris hemispherica (Gray, 1847) -- valid
  Psarocolius wagleri (G. R. Gray, 1845) -- valid -- Chestnut-headed Oropendola, Oropéndola cabeza castaña
  Psarocolius wagleri wagleri (G. R. Gray, 1845) -- valid
  Psenuc milledgei (Zabka & Gray, 2002) -- valid
  Pseudalopex griseus (Gray, 1837) -- invalid -- Argentine gray fox
  Pseudechis australis (Gray, 1842) -- valid -- King Brown, Mulga Snake
  Pseudemys Gray, 1856 -- valid -- cooter turtles, Cooters, red-bellied turtles
  Pseudobranchus Gray, 1825 -- valid -- Dwarf Sirens
  Pseudobulweria macgillivrayi (G. R. Gray, 1860) -- valid -- Fiji Petrel
  Pseudocalotes tympanistriga (Gray, 1831) -- valid -- Indonesian False Bloodsucker
  Pseudocossyphus sharpei (G. R. Gray, 1871) -- invalid -- Forest Rock Thrush
  Pseudoeurycea bellii (Gray, 1850) -- invalid
  Pseudomalaxis zanclaea Gray, 1853 -- invalid
  Pseudomys Gray, 1832 -- valid -- Australian Mice
  Pseudomys australis Gray, 1832 -- valid -- Plains Pseudomys
  Pseudopatiria obtusa (Gray, 1847) -- valid
  Pseudophryne australis (Gray, 1835) -- valid
  Pseudophryne bibroni australis (Gray, 1835) -- invalid
  Pseudopus gracilis Gray, 1845 -- invalid
  Pseudorectes ferrugineus leucorhynchus (G. R. Gray, 1862) -- valid
  Pseudorhombus russellii (Gray, 1834) -- invalid
  Psittaculirostris J. E. Gray & G. R. Gray, 1859 -- valid
  Psittiparus gularis (G. R. Gray, 1845) -- valid -- Grey-headed Parrotbill
  Psittiparus gularis gularis (G. R. Gray, 1845) -- valid
  Ptenopus Gray, 1866 -- valid
  Pteraster capensis (Gray, 1847) -- valid
  Pteriidae Gray, 1847 -- valid
  Pternistis leucoscepus (G. R. Gray, 1867) -- invalid
  Pterocnemia G. R. Gray, 1871 -- invalid
  Pterodontia flavipes Gray and Pidgeon, 1832 -- valid
  Pterodroma cooki (G. R. Gray, 1843) -- invalid
  Pterodroma cookii (G. R. Gray, 1843) -- valid -- Cook's Petrel, Petrel de Cook, Pétrel de Cook
  Pteroicnemia G. R. Gray, 1871 -- invalid
  Pteromys derbianus Gray, 1842 -- invalid
  Pteronotus Gray, 1838 -- valid -- moustached bats, naked-backed bats
  Pteronotus (Chilonycteris) Gray, 1839 -- valid
  Pteronotus (Phyllodia) Gray, 1843 -- valid
  Pteronotus (Pteronotus) Gray, 1838 -- valid
  Pteronotus davyi Gray, 1838 -- valid -- Davy's Naked-backed Bat
  Pteronotus davyi davyi Gray, 1838 -- valid
  Pteronotus macleayii (Gray, 1839) -- valid -- MacLeay's Mustached Bat
  Pteronotus macleayii macleayii (Gray, 1839) -- valid
  Pteronotus parnellii (Gray, 1843) -- valid -- Common Mustached Bat, Murciélago-bigotudo de Parnell, Parnell's Common Mustached Bat, Parnell's Mustached Bat
  Pteronotus parnellii parnellii (Gray, 1843) -- invalid
  Pteronotus quadridens fuliginosus (Gray, 1843) -- valid
  Pteronura Gray, 1837 -- valid
  Pteronura sambachii Gray, 1837 -- invalid
  Pteropodidae Gray, 1821 -- valid -- flying foxes, megabats, non-echolocating bats, Old World fruit bats
  Pteropodinae Gray, 1821 -- valid -- Old World fruit bats
  Pteropodini Gray, 1821 -- valid
  Pteropus anetianus (Gray, 1870) -- valid -- Vanauatu flying fox, Vanuatu Flying Fox
  Pteropus anetianus anetianus (Gray, 1870) -- valid
  Pteropus argentatus Gray, 1844 -- invalid -- Ambon Flying Fox
  Pteropus caniceps Gray, 1870 -- valid -- North Moluccan Flying Fox
  Pteropus caniceps caniceps Gray, 1870 -- invalid
  Pteropus floresii Gray, 1871 -- invalid
  Pteropus livingstonei Gray, 1866 -- invalid -- Comoro Black Flying Fox
  Pteropus livingstonii Gray, 1866 -- valid -- Comoro Black Flying Fox, Comoro Flying Fox, Livingstone's Flying Fox
  Pteropus loochoensis Gray, 1870 -- invalid -- Japanese Flying Fox
  Pteropus nawaiensis Gray, 1870 -- invalid
  Pteropus ornatus Gray, 1870 -- valid -- Ornate Flying Fox
  Pteropus ornatus ornatus Gray, 1870 -- valid
  Pteropus rayneri Gray, 1870 -- valid -- Solomons Flying Fox
  Pteropus rayneri rayneri Gray, 1870 -- valid
  Pteropus samoensis nawaiensis Gray, 1870 -- valid
  Pteropus wallacei Gray, 1866 -- invalid
  Pterotrachea keraudrenii J. E. Gray, 1850 -- valid
  Pterotracheidae Gray, 1840 -- valid
  Pteruthius xanthochlorus J. E. Gray & G. R. Gray, 1847 -- valid -- Green Shrike-Babbler
  Pteruthius xanthochlorus xanthochlorus J. E. Gray & G. R. Gray, 1847 -- valid
  Ptilinopus aurantiifrons G. R. Gray, 1858 -- valid -- Orange-fronted Fruit Dove
  Ptilinopus chalcurus G. R. Gray, 1860 -- valid -- Makatea Fruit Dove
  Ptilinopus coronulatus G. R. Gray, 1858 -- valid -- Coroneted Fruit Dove
  Ptilinopus coronulatus coronulatus G. R. Gray, 1858 -- valid
  Ptilinopus formosus (G. R. Gray, 1860) -- invalid
  Ptilinopus iozonus G. R. Gray, 1858 -- valid -- Orange-bellied Fruit Dove
  Ptilinopus iozonus iozonus G. R. Gray, 1858 -- valid
  Ptilinopus occipitalis G. R. Gray, 1844 -- valid -- Yellow-breasted Fruit Dove
  Ptilinopus occipitalis occipitalis G. R. Gray, 1844 -- valid
  Ptilinopus purpuratus chrysogaster G. R. Gray, 1854 -- valid
  Ptilinopus rivoli prasinorrhous G. R. Gray, 1858 -- valid
  Ptilinopus solomonensis G. R. Gray, 1870 -- valid -- Yellow-bibbed Fruit Dove
  Ptilinopus solomonensis solomonensis G. R. Gray, 1870 -- valid
  Ptilinopus wallacii G. R. Gray, 1858 -- valid -- Wallace's Fruit Dove
  Ptilocercus Gray, 1848 -- valid
  Ptilocercus lowii Gray, 1848 -- valid -- Pen-tailed Tree Shrew, Pen-tailed Treeshrew
  Ptilocercus lowii lowii Gray, 1848 -- valid
  Ptilocerus Gray, 1831 -- valid
  Ptilocerus fuscus Gray, 1831 -- valid
  Ptilosarcus gurneyi (Gray, 1860) -- valid
  Ptilosarcus sinuosus Gray, 1860 -- valid
  Ptilotis megarhynchus G. R. Gray, 1858 -- invalid
  Ptilotis polygramma G. R. Gray, 1862 -- invalid
  Ptilotis sonoroides G. R. Gray, 1862 -- invalid
  Ptychozoon horsfieldii (Gray, 1827) -- valid
  Pucrasia G. R. Gray, 1841 -- valid
  Pucrasia macrolopha xanthospila G. R. Gray, 1864 -- valid
  Pudu Gray, 1852 -- valid -- pudus
  Puperita Gray, 1857 -- valid
  Pupilaea Gray In Sowerby, 1835 -- valid
  Pupinella Gray, 1850 -- valid
  Pusula californiana (J. E. Gray, 1827) -- valid -- California trivia
  Pycnonotidae G. R. Gray, 1840 -- valid -- Bulbuls
  Pycnonotus goiavier yourdini G. R. Gray, 1847 -- valid
  Pycnonotus leucogenys (J. E. Gray, 1835) -- valid -- Himalayan Bulbul
  Pyramidellidae Gray, 1840 -- valid
  Pyrgomatidae Gray, 1825 -- valid -- coral barnacles
  Pyroderus G. R. Gray, 1840 -- valid
  Pyronicia Gray, 1858 -- invalid
  Pyrrhura picta roseifrons (G. R. Gray, 1859) -- valid
  Pyxiclemmys Gray, 1863 -- invalid
  Pyxidea Gray, 1863 -- invalid -- Keeled Box Turtles
  Pyxidea mouhotii (Gray, 1862) -- invalid -- keeled box turtle
  Pyxis arachnoides oblonga Gray, 1869 -- valid -- Southern Spider Tortoise
  Rabienus Gray, 1821 -- invalid
  Raclitia Gray, 1842 -- valid
  Raclitia indica Gray, 1842 -- valid -- Selangor Mud Snake
  Raconda Gray, 1831 -- valid
  Raconda russeliana Gray, 1831 -- valid -- raconda
  Raeta Gray, 1853 -- valid
  Rafetus Gray, 1864 -- valid -- Bicallosite Softshell Turtles
  Rafetus swinhoei (Gray, 1873) -- valid -- Red River Giant Softshell Turtle, Shanghai Softshell Turtle, Swinhoe's Softshell Turtle, Yangtze Giant Softshell Turtle
  Rallina G. R. Gray, 1846 -- valid -- Red-legged Crakes
  Rallina tricolor G. R. Gray, 1858 -- valid -- Red-necked Crake
  Ramphotrigon G. R. Gray, 1855 -- valid
  Ramphotyphlops australis (Gray, 1845) -- invalid -- Southern Blindsnake
  Ramphotyphlops cumingii (Gray, 1845) -- valid -- Cuming's Blind Snake
  Ramphotyphlops nigrescens (Gray, 1845) -- invalid
  Ramphotyphlops olivaceus (Gray, 1845) -- valid -- Olive Blind Snake
  Ramsayornis modestus (G. R. Gray, 1858) -- valid -- Brown-backed Honeyeater, melífago-modesto, Méliphage modeste, Mielero modesto
  Rana bengalensis Gray, 1830 -- invalid
  Rana benghalensis Gray, 1830 -- invalid
  Randasia Gray, 1840 -- invalid
  Randasia granulata Gray, 1847 -- invalid
  Randasia luzonica Gray, 1840 -- invalid
  Ranellidae Gray, 1854 -- valid
  Rankinia Gray, 1841 -- valid
  Rankinia diemensis (Gray, 1841) -- valid -- Mountain Dragon, Mountain Heath Dragon
  Ranoidea australis (Gray, 1842) -- valid
  Rapara Gray, 1825 -- invalid
  Rappia bicolor (Gray, 1842) -- invalid
  Ratellus Gray, 1827 -- invalid
  Rattus leucopus (Gray, 1867) -- valid -- Cape York Rat
  Rattus lutreolus (J. E. Gray, 1841) -- valid -- Australian Swamp Rat
  Rattus xanthurus (Gray, 1867) -- valid -- Northeastern Xanthurus Rat
  Ratufa Gray, 1867 -- valid -- Oriental Giant Squirrels
  Redamia Gray, 1870 -- invalid
  Renillidae Gray, 1860 -- valid
  Retaster capensis Gray, 1847 -- invalid
  Rhacophorus leucomystax maculatus (Gray, 1830) -- invalid
  Rhacophorus maculatus (Gray, 1830) -- invalid
  Rhadine balesi (Gray, 1937) -- valid
  Rhadine lanei (Gray, 1937) -- valid
  Rhadinophis frenatus (Gray, 1853) -- invalid
  Rhamphomantis megarhynchus (G. R. Gray, 1858) -- valid
  Rhaphidura sabini (J. E. Gray, 1829) -- valid -- Sabine's Spinetail
  Rheithrosciurus Gray, 1867 -- valid
  Rheithrosciurus macrotis (Gray, 1857) -- valid -- Tufted Ground Squirrel
  Rhinaster Gray, 1862 -- invalid
  Rhinaster (Keitloa) Gray, 1868 -- invalid
  Rhinoceros crossii Gray, 1854 -- invalid
  Rhinoceros floweri Gray, 1868 -- invalid
  Rhinoceros nasalis Gray, 1868 -- invalid
  Rhinoceros stenocephalus Gray, 1868 -- invalid
  Rhinocerotidae Gray, 1821 -- valid -- Rhinoceroses, rhinos
  Rhinoclemmydinae Gray, 1873 -- valid
  Rhinoclemmys annulata (Gray, 1860) -- valid -- Brown Wood Turtle
  Rhinoclemmys bocourtii Gray, 1873 -- invalid
  Rhinoclemmys frontalis Gray, 1873 -- invalid
  Rhinoclemmys melanosterna (Gray, 1861) -- valid -- Colombian Wood Turtle
  Rhinoclemmys pulcherrima (Gray, 1856) -- valid -- Painted Wood Turtle, Tortuga-de monte pintada
  Rhinoclemmys pulcherrima pulcherrima (Gray, 1856) -- valid -- Guerrero Wood Turtle
  Rhinoclemys bellii Gray, 1863 -- invalid
  Rhinoclemys lunata Gray, 1873 -- invalid
  Rhinoclemys ventricosa Gray, 1873 -- invalid
  Rhinocrypta G. R. Gray, 1841 -- valid
  Rhinolophidae Gray, 1825 -- valid -- horseshoe bats
  Rhinolophinae Gray, 1825 -- invalid
  Rhinolophoidea Gray, 1825 -- valid
  Rhinolophus aurantius Gray, 1845 -- invalid
  Rhinolophus luctus morio Gray, 1842 -- invalid
  Rhinolophus megaphyllus Gray, 1834 -- valid -- Eastern Horseshoe Bat, Smaller Horseshoe Bat
  Rhinolophus megaphyllus megaphyllus Gray, 1834 -- valid
  Rhinolophus morio Gray, 1842 -- valid -- Malaysian Woolly Horseshoe Bat
  Rhinonicteris Gray, 1847 -- valid
  Rhinonicteris aurantia (Gray, 1845) -- valid -- Orange Diamond-faced Bat, Orange Leaf-nosed Bat
  Rhinonycteridae Gray, 1866 -- valid -- trident bats
  Rhinonycteris Gray, 1847 -- invalid
  Rhinonycteris aurantius (Gray, 1845) -- invalid
  Rhinophis melanogaster (Gray, 1858) -- valid -- Gray's Earth Snake
  Rhinopoma hardwickei Gray, 1831 -- invalid
  Rhinopoma hardwickii Gray, 1831 -- valid -- Lesser Mouse-tailed Bat
  Rhinopoma hardwickii hardwickii Gray, 1831 -- invalid
  Rhinosciurus tupaioides Gray, 1843 -- invalid
  Rhipidura albiscapa pelzelni G. R. Gray, 1862 -- valid
  Rhipidura hyperythra G. R. Gray, 1858 -- valid -- Chestnut-bellied Fantail
  Rhipidura hyperythra hyperythra G. R. Gray, 1858 -- valid
  Rhipidura maculipectus G. R. Gray, 1858 -- valid -- Black Thicket Fantail
  Rhipidura rufiventris assimilis G. R. Gray, 1858 -- valid
  Rhipidura spilodera G. R. Gray, 1870 -- invalid -- Streaked Fantail
  Rhipidura verreauxi spilodera G. R. Gray, 1870 -- valid -- Streaked Fantail
  Rhizomys Gray, 1831 -- valid -- Bamboo Rats
  Rhizomys minor Gray, 1842 -- invalid
  Rhizomys sinensis Gray, 1831 -- valid -- Chinese Bamboo Rat
  Rhizothera G. R. Gray, 1841 -- valid
  Rhopalodina Gray, 1853 -- valid
  Rhopalodina lageniformis Gray, 1853 -- valid
  Rhopia Gray, 1840 -- invalid
  Rhynchogale melleri (Gray, 1865) -- valid -- Meller's Mongoose
  Rhynchogale melleri melleri (Gray, 1865) -- valid
  Rhynchotus maculicollis G. R. Gray, 1867 -- valid -- Huayco Tinamou
  Rhynchotus rufescens maculicollis G. R. Gray, 1867 -- invalid
  Riama Gray, 1858 -- valid
  Riama unicolor Gray, 1858 -- valid -- Drab Lightbulb Lizard
  Riopa Gray, 1839 -- valid
  Riopa albopunctata (Gray, 1846) -- valid -- White-spotted Supple Skink
  Riopa lineata (Gray, 1839) -- valid -- Lined Supple Skink
  Riopa vosmaerii (Gray, 1839) -- valid -- Vosmer's Writhing Skink
  Riparia chinensis (J. E. Gray, 1830) -- valid
  Riparia chinensis chinensis (J. E. Gray, 1830) -- valid
  Rissoella J. E. Gray, 1847 -- valid
  Rissoellidae Gray, 1850 -- valid
  Rissoidae Gray, 1847 -- valid
  Ristella Gray, 1839 -- valid
  Ristella rurkii Gray, 1839 -- valid -- Rurk's Ristella
  Rousettus Gray, 1821 -- valid
  Rousettus (Rousettus) Gray, 1821 -- invalid
  Rousettus (Stenonycteris) Gray, 1871 -- invalid
  Rousettus aegyptiacus unicolor (Gray, 1870) -- valid
  Rousettus amplexicaudatus infumatus (Gray, 1870) -- valid
  Roxania Leach In Gray, 1847 -- valid
  Rusa unicolor cambojensis (Gray, 1861) -- valid
  Saara Gray, 1845 -- valid
  Saara hardwickii (Gray, 1827) -- valid -- Hardwick's Spiny-tailed Lizard
  Sacalia Gray, 1870 -- valid -- Eyed Turtles
  Sacalia bealei (Gray, 1831) -- valid -- Beal's Eyed Turtle
  Saguinus fuscicollis leucogenys (Gray, 1866) -- invalid
  Saguinus labiatus rufiventer (Gray, 1843) -- valid -- Gray's Red-bellied Tamarin
  Saguinus leucogenys (Gray, 1866) -- invalid -- Andean Saddle-back Tamarin
  Saiga Gray, 1843 -- valid
  Saiphos Gray in Cuvier, 1831 -- valid
  Saiphos equalis (Gray, 1825) -- valid -- Three-toed Skink, Yellow-bellied Three-toed Skink
  Salamandra argus Gray, 1850 -- invalid
  Salamandra beecheyi Gray, 1839 -- invalid
  Salamandra frontalis Gray, 1831 -- invalid
  Salamandra greeni Gray, 1831 -- invalid
  Salamandra nigra Gray, 1850 -- invalid
  Salamandra platydactylus Gray, 1831 -- invalid
  Salamandra vittatus (Gray in Jenyns, 1835) -- invalid
  Salanoia Gray, 1865 -- valid
  Salanx reevesii (Gray, 1831) -- valid
  Salea Gray, 1845 -- valid
  Salea horsfieldii Gray, 1845 -- valid -- Horsfield's Spiny Lizard, Nilgiri Salea
  Salpornis G. R. Gray, 1847 -- valid
  Saltator coerulescens vigorsii G. R. Gray, 1844 -- valid
  Samaris Gray, 1831 -- valid
  Samaris cristatus Gray, 1831 -- valid -- crested flounder
  Samus Gray, 1867 -- valid
  Sanzinia Gray, 1849 -- valid
  Sarbieria Gray, 1869 -- invalid
  Sargus ensifer Gronow in Gray, 1854 -- invalid
  Sargus maculatus Gronow in Gray, 1854 -- invalid
  Sarothrura pulchra (J. E. Gray, 1829) -- valid -- White-spotted Flufftail
  Sarothrura pulchra pulchra (J. E. Gray, 1829) -- valid
  Saulea Gray, 1867 -- valid
  Sauresia sepsoides Gray, 1852 -- invalid
  Sava tuberculata (Gray, 1832) -- valid
  Saxicola ferrea J. E. Gray & G. R. Gray, 1847 -- invalid
  Saxicola ferreus J. E. Gray & G. R. Gray, 1847 -- valid
  Saxicola insignis J. E. Gray & G. R. Gray, 1847 -- valid -- White-throated Bush Chat
  Scalpellum ornatum (Gray, 1848) -- valid
  Scapia Gray, 1869 -- invalid
  Scarus maculatus Gronow in Gray, 1854 -- invalid
  Scarus mordax Gronow in Gray, 1854 -- invalid
  Sceloglaux albifacies (G. R. Gray, 1844) -- valid -- Laughing Owl
  Sceloglaux albifacies albifacies (G. R. Gray, 1844) -- valid
  Schismotis J. Gray, 1856 -- invalid
  Schizochiton Gray, 1847 -- valid
  Schizothorax richardsonii (Gray, 1832) -- valid
  Scincella reevesii (Gray, 1838) -- valid -- Reeves' Smooth Skink
  Scissurellidae Gray, 1847 -- valid
  Sciurillus pusillus kuhlii (Gray, 1867) -- valid
  Sciurocheirus Gray, 1872 -- valid -- squirrel galagos
  Sciurocheirus gabonensis (Gray, 1863) -- valid -- Gabon Allen's Galago, Gabon Bushbaby, Gabon Squirrel Galago
  Sciurus (Guerlinguetus) Gray, 1821 -- valid
  Sciurus anomalus pallescens (Gray, 1867) -- valid
  Sciurus granatensis gerrardi Gray, 1861 -- valid
  Sciurus granatensis griseogena (Gray, 1867) -- valid
  Sciurus granatensis splendidus Gray, 1842 -- valid
  Sciurus ignitus (Gray, 1867) -- valid -- Bolivian Squirrel
  Sciurus ignitus ignitus (Gray, 1867) -- valid
  Sciurus ignitus irroratus (Gray, 1867) -- valid
  Sciurus niger neglectus (Gray, 1867) -- invalid
  Sciurus pucheranii medellinensis (Gray, 1867) -- valid
  Sciurus variegatoides boothiae Gray, 1843 -- valid
  Sciurus variegatoides dorsalis Gray, 1849 -- valid
  Sciurus variegatoides melania (Gray, 1867) -- valid
  Scleroptila psilolaemus (G. R. Gray, 1867) -- invalid
  Sconsia Gray, 1847 -- valid
  Scotophilus coromandra Gray, 1838 -- invalid
  Scotophilus gouldii Gray, 1841 -- invalid
  Scotophilus greyii Gray, 1843 -- invalid
  Scotophilus javanicus Gray, 1838 -- invalid
  Scotophilus morio Gray, 1841 -- invalid
  Scotophilus pumilus Gray, 1841 -- invalid
  Scotophilus welwitschii Gray, 1866 -- invalid
  Scotorepens greyii (Gray, 1843) -- valid -- Grey's Broad-nosed Bat, Little Broad-nosed Bat
  Scurria Gray, 1847 -- valid
  Scutengraulis hamiltonii (Gray, 1835) -- invalid
  Scyllium maculatum Gray, 1830 -- invalid
  Scyllium ornatum Gray, 1830 -- invalid
  Scypha Gray, 1821 -- valid
  Scytaster subulatus (Gray, 1840) -- invalid
  Scytaster tuberculatus (Gray, 1840) -- invalid
  Seicercus xanthoschistos (J. E. Gray & G. R. Gray, 1847) -- invalid
  Semioptera G. R. Gray, 1859 -- valid
  Semioptera wallacii G. R. Gray, 1859 -- valid -- Standardwing
  Semioptera wallacii wallacii G. R. Gray, 1859 -- valid
  Semnocebus Gray, 1870 -- invalid
  Semnopithecus nobilis Gray, 1842 -- invalid
  Semperella Gray, 1868 -- valid
  Seniocebus Gray, 1870 -- invalid
  Sephanoides G. R. Gray, 1840 -- valid
  Sepia (Sepiella) Gray, 1849 -- invalid
  Sepia apama Gray, 1849 -- valid
  Sepia lycidas Gray, 1849 -- valid
  Sepia mestus Gray, 1849 -- valid
  Sepia microcheirus Gray, 1849 -- invalid
  Sepia myrsus Gray, 1849 -- invalid
  Sepia plangon Gray, 1849 -- valid
  Sepia sinope Gray, 1849 -- invalid
  Sepia vicellius Gray, 1849 -- invalid
  Sepiella Gray, 1849 -- valid
  Sepioteuthis major Gray, 1828 -- invalid
  Sepioteuthis sloanii Gray, 1849 -- invalid
  Sericornis spilodera (G. R. Gray, 1859) -- valid -- Pale-billed Scrubwren
  Sericornis spilodera spilodera (G. R. Gray, 1859) -- valid
  Serinus burtoni (G. R. Gray, 1862) -- invalid -- Thick-billed Seedeater
  Serinus burtoni burtoni (G. R. Gray, 1862) -- invalid
  Serinus rufobrunneus (G. R. Gray, 1862) -- invalid -- Principe Seedeater
  Serinus rufobrunneus rufobrunneus (G. R. Gray, 1862) -- invalid
  Sertularella Gray, 1848 -- valid
  Siaga Gray, 1843 -- invalid
  Siamanga Gray, 1843 -- invalid
  Sibbaldius Gray, 1864 -- invalid
  Sibynophis collaris (Gray, 1853) -- valid -- Common Many-tooth Snake
  Sibynophis melanocephalus (Gray, 1835) -- valid -- Black-headed Collared Snake, Malayan Many-tooth Snake
  Sibynophis melanocephalus melanocephalus (Gray, 1835) -- valid
  Sicista Gray, 1827 -- valid -- Birch Mice
  Siebenrockiella crassicollis (Gray, 1830) -- valid -- Black Marsh Turtle
  Sieboldia Gray, 1838 -- invalid
  Sieboldiana Gray, 1838 -- invalid
  Sieboldtia Gray, 1838 -- invalid
  Sigatica semisulcata (J. E. Gray, 1839) -- valid -- semisulcate moonsnail
  Siloboura ellioti Gray, 1858 -- invalid
  Silurana Gray, 1864 -- invalid
  Silurana intertropicalis Gray, 1864 -- invalid
  Silurana tropicalis Gray, 1864 -- invalid
  Simalia Gray, 1849 -- valid
  Siphonariidae Gray, 1827 -- valid
  Siphunculus arcuatus Gray, 1828 -- invalid
  Sipodotus wallacii (G. R. Gray, 1862) -- valid -- Wallace's Fairywren
  Sipodotus wallacii wallacii (G. R. Gray, 1862) -- valid
  Sipunculus dentalii Gray, 1828 -- invalid
  Sirenidae Gray, 1825 -- valid -- Sirens
  Sminthopsis leucopus (Gray, 1842) -- valid -- White-footed Dunnart
  Smithornis rufolateralis G. R. Gray, 1864 -- valid -- Rufous-sided Broadbill
  Smithornis rufolateralis rufolateralis G. R. Gray, 1864 -- valid
  Solaster (Polyaster) Gray, 1840 -- invalid
  Solegnathus hardwickii (Gray, 1830) -- valid
  Solemyidae J. E. Gray, 1840 -- valid
  Somateria mollissima v-nigra G. R. Gray, 1856 -- invalid
  Soriculus nigrescens (Gray, 1842) -- valid -- Himalayan Shrew
  Soriculus nigrescens nigrescens (Gray, 1842) -- valid
  Sotalia Gray, 1866 -- valid
  Sotalia tucuxi (Gray, 1856) -- invalid
  Sousa Gray, 1866 -- valid -- humpbacked dolphins
  Spalacidae Gray, 1821 -- valid
  Spalacinae Gray, 1821 -- valid
  Sparus fasciatus Gronow in Gray, 1854 -- invalid
  Sparus nigricans Gronow in Gray, 1854 -- invalid
  Spatangidae Gray, 1825 -- valid
  Spatangus Gray, 1825 -- valid
  Spatulemys Gray, 1872 -- invalid
  Spatulemys lasalae Gray, 1872 -- invalid
  Spectrum anetianum Gray, 1870 -- invalid
  Speirops melanocephalus (G. R. Gray, 1862) -- invalid -- Mount Cameroon Speirops
  Spelerpes bellii Gray, 1850 -- invalid
  Spelerpes salvinii (Gray, 1868) -- invalid
  Spelerpes variegatus (Gray in Cuvier, 1831) -- invalid
  Spelerpes vermicularis (Gray, 1868) -- invalid
  Sphaeriodiscus inaequalis (Gray, 1847) -- valid
  Sphaerocephalus Gray, 1864 -- invalid
  Sphaerodactylus nigropunctatus Gray, 1845 -- valid
  Sphaerodactylus richardsonii Gray, 1845 -- valid
  Sphenodon Gray, 1831 -- valid -- Tuataras
  Sphenodon punctatus (Gray, 1842) -- valid -- Tuatara
  Sphenomorphus fasciatus (Gray, 1845) -- valid -- Banded Sphenomorphus
  Sphenomorphus indicus (Gray, 1853) -- valid -- Himalayan Forest Skink, Indian Forest Skink
  Spilocuscus Gray, 1861 -- valid -- spotted cuscuses
  Spilogale Gray, 1865 -- valid -- spotted skunks
  Spilornis G. R. Gray, 1840 -- valid
  Spinularia Gray, 1867 -- valid
  Spisula Gray, 1837 -- valid
  Spizastur Gray, 1841 -- invalid
  Spondylidae Gray, 1826 -- valid
  Spongiidae Gray, 1867 -- valid
  Spongillidae Gray, 1867 -- valid
  Squatina angelus Gronow in Gray, 1854 -- invalid
  Staurotypidae Gray, 1869 -- invalid
  Staurotypina Gray, 1869 -- invalid
  Staurotypinae Gray, 1869 -- valid
  Staurotypus salvinii Gray, 1864 -- valid -- Pacific Coast Giant Musk Turtle
  Stellaster Gray, 1840 -- valid
  Stellaster belcheri Gray, 1847 -- invalid
  Stellaster childreni Gray, 1840 -- valid
  Stellaster incei Gray, 1847 -- invalid
  Stelligera Gray, 1867 -- valid
  Stenella Gray, 1866 -- valid -- spinner dolphins, spotted dolphins, striped dolphins
  Stenella attenuata (Gray, 1846) -- valid -- Delfín moteado, Pantropical Spotted Dolphin
  Stenella attenuata attenuata (Gray, 1846) -- valid -- Offshore pantropical spotted dolphin
  Stenella clymene (Gray, 1850) -- valid -- Clymene Dolphin, Delfín de Clymen, short-snouted spinner dolphin
  Stenella euphrosyne (Gray, 1846) -- invalid
  Stenella longirostris (Gray, 1828) -- valid -- Delfín tornillo, long-snouted spinner dolphin, Spinner Dolphin
  Stenella longirostris longirostris (Gray, 1828) -- valid -- Gray's spinner dolphin
  Stenella styx (Gray, 1846) -- invalid
  Steno Gray, 1846 -- valid -- rough-toothed dolphins
  Steno attenuatus Gray, 1846 -- invalid
  Steno lentiginosus Gray, 1866 -- invalid
  Stenocercus ornatus (Gray, 1845) -- valid -- Girard's Whorltail Iguana
  Stenonycteris Gray, 1871 -- valid
  Stenophysa maugeriae (J. E. Gray, 1837) -- valid -- tawny aplexa
  Stephanaster australis (Gray, 1840) -- invalid
  Stephanaster duebeni (Gray, 1847) -- invalid
  Stephanaster pulchellus (Gray, 1840) -- invalid
  Sterna acuticauda J. E. Gray, 1831 -- valid -- Black-bellied Tern
  Sterna aurantia J. E. Gray, 1831 -- valid -- River Tern
  Sternotherus Bell in Gray, 1825 -- valid -- Musk Turtles
  Sternotherus carinatus (Gray, 1856) -- valid -- Razor-backed Musk Turtle
  Sternotherus carinatus carinatus (Gray, 1856) -- invalid
  Sternotherus derbianus Gray, 1844 -- invalid
  Stigmochelys Gray, 1873 -- valid
  Stiltia G. R. Gray, 1855 -- valid
  Stomatellidae Gray, 1840 -- valid
  Stramonita haemastoma canaliculata (J. E. Gray, 1839) -- valid -- Florida rocksnail
  Strigamia Gray, 1843 -- valid
  Strigocuscus Gray, 1861 -- valid
  Strigocuscus celebensis (Gray, 1858) -- valid -- Sulawesi Dwarf Cuscus
  Strigocuscus celebensis celebensis (Gray, 1858) -- valid
  Strigops G. R. Gray, 1845 -- valid
  Strigops habroptila G. R. Gray, 1845 -- valid -- Kakapo
  Strigops habroptilus G. R. Gray, 1845 -- invalid
  Stringops habroptilus G. R. Gray, 1845 -- invalid
  Strix punctatissima Gould & G. R. Gray, 1838 -- invalid
  Strix tuidara J. E. Gray, 1828 -- invalid
  Strophurus spinigerus (Gray, 1842) -- valid
  Sturnira Gray, 1842 -- valid
  Sturnira (Sturnira) Gray, 1842 -- invalid
  Stylaster Gray, 1831 -- valid
  Stylasteridae Gray, 1847 -- valid -- hydrocoralliaires, hydrocorals
  Styliola Gray, 1850 -- valid
  Styloctenium wallacei (Gray, 1866) -- valid -- Stripe-faced Fruit Bat, Wallace's Stripe-faced Fruit Bat
  Stylops childreni Gray, 1832 -- valid
  Subergorgia Gray, 1857 -- valid
  Suidae Gray, 1821 -- valid -- hogs, pigs
  Suinae Gray, 1821 -- valid
  Suini Gray, 1821 -- valid
  Sundarus rufoscutellatus (Gray, 1832) -- valid
  Sundasciurus hippurus borneensis (Gray, 1867) -- valid
  Sus scrofa libycus Gray, 1868 -- valid
  Susuidae Gray, 1868 -- invalid
  Suta gouldii (Gray, 1841) -- invalid
  Swanka Gray, 1844 -- invalid
  Swanka fasciata Gray, 1869 -- invalid
  Swanka maculata Gray, 1869 -- invalid
  Sylvicapra grimmia campbelliae (Gray, 1843) -- valid
  Sylvicapra grimmia coronata (Gray, 1842) -- valid
  Sylvicapra grimmia splendidula (Gray, 1891) -- valid
  Sylvilagus Gray, 1867 -- valid -- Cottontails
  Sylvilagus (Sylvilagus) Gray, 1867 -- invalid
  Sylvilagus (Tapeti) Gray, 1867 -- invalid
  Sylvisorex morio (Gray, 1862) -- valid -- Arrogant Shrew, Mt. Cameroon Forest Shrew
  Symplectoscyphus johnstoni (Gray, 1843) -- valid
  Symplectoscyphus johnstoni johnstoni (Gray, 1843) -- valid
  Symposiachrus bimaculatus (G. R. Gray, 1861) -- valid
  Symposiachrus bimaculatus bimaculatus (G. R. Gray, 1861) -- valid
  Symposiachrus leucurus (G. R. Gray, 1858) -- valid -- White-tailed Monarch
  Symposiachrus trivirgatus gouldii (G. R. Gray, 1861) -- valid
  Symposiachrus trivirgatus melanopterus (G. R. Gray, 1858) -- valid
  Symposiachrus trivirgatus nigrimentum (G. R. Gray, 1861) -- valid
  Synaphobranchus pinnatus (Gronow in Gray, 1854) -- invalid
  Synapta henslowana Gray, 1848 -- invalid
  Synarchus Gray, 1865 -- invalid
  Syncerus caffer brachyceros (Gray, 1837) -- valid
  Syrmaticus reevesi (J. E. Gray, 1829) -- invalid
  Syrmaticus reevesii (J. E. Gray, 1829) -- valid -- Reeves's Pheasant
  Taccocua leschenaultii sirkee (J. E. Gray, 1831) -- valid
  Tachybaptus tricolor (G. R. Gray, 1861) -- valid -- Tricolored Grebe
  Tachybaptus tricolor tricolor (G. R. Gray, 1861) -- valid
  Tadarida australis (Gray, 1839) -- invalid -- White-striped Free-tailed Bat
  Tadarida brasiliensis murina (Gray, 1827) -- valid
  Taeromys celebensis (Gray, 1867) -- valid -- Long-tailed Taeromys
  Tagelus Gray, 1847 -- valid
  Tamandua Gray, 1825 -- valid -- tamandua
  Tamandua bivittata opistholeuca Gray, 1873 -- invalid
  Tamandua bivittata opisthomelas Gray, 1873 -- invalid
  Tamandua mexicana opistholeuca Gray, 1873 -- valid
  Tamaria Gray, 1840 -- valid
  Tamaria fusca Gray, 1840 -- valid
  Tamarin Gray, 1870 -- invalid
  Tamias quadrimaculatus Gray, 1867 -- valid -- Long-eared Chipmunk
  Tanoa Gray, 1863 -- invalid
  Tanysiptera galatea G. R. Gray, 1859 -- valid -- Alción colilargo común, Common Paradise Kingfisher, Common Paradise-Kingfisher, Galatea Paradise Kingfisher, Martin-chasseur à longs brins
  Tanysiptera galatea galatea G. R. Gray, 1859 -- valid
  Tanysiptera galatea nais G. R. Gray, 1861 -- valid
  Tanysiptera galatea sabrina G. R. Gray, 1861 -- valid
  Tanysiptera hydrocharis G. R. Gray, 1858 -- valid -- Alción colilargo de las Aru, Little Paradise Kingfisher, Little Paradise-Kingfisher, Martin-chasseur menu
  Tanysiptera nais G. R. Gray, 1861 -- invalid
  Tanysiptera nympha G. R. Gray, 1840 -- valid -- Alción colilargo ninfa, Fairy Paradise Kingfisher, Martin-chasseur nymphe, Red-breasted Paradise Kingfisher, Red-breasted Paradise-Kingfisher
  Tanysiptera sabrina G. R. Gray, 1861 -- invalid
  Tapiridae Gray, 1821 -- valid -- Tapirs
  Tapirus aenigmaticus Gray, 1872 -- invalid
  Tapirus ecuadorensis Gray, 1872 -- invalid
  Tapirus laurillardi Gray, 1868 -- invalid
  Tapirus terrestris aenigmaticus Gray, 1872 -- invalid
  Tapirus terrestris peruvianus Gray, 1872 -- invalid
  Tarentola Gray, 1825 -- valid -- Wall Geckos
  Tarentola americana (Gray, 1831) -- valid
  Taricha Gray, 1850 -- valid -- Pacific Newts
  Tarlina Gray, 1987 -- valid
  Tarlina daviesae Gray, 1987 -- valid
  Tarlina milledgei Gray, 1987 -- valid
  Tarlina noorundi Gray, 1987 -- valid
  Tarlina simipes Gray, 1987 -- valid
  Tarlina smithersi Gray, 1987 -- valid
  Tarsiidae Gray, 1825 -- valid -- tarsiers
  Tartarus Gray, 1973 -- valid
  Tartarus mullamullangensis Gray, 1973 -- valid
  Tartarus murdochensis Gray, 1992 -- valid
  Tartarus nurinensis Gray, 1992 -- valid
  Tartarus thampannensis Gray, 1992 -- valid
  Tatera afra (Gray, 1830) -- invalid -- Cape gerbil
  Tauraco livingstonii (G. R. Gray, 1864) -- valid -- Livingstone's Turaco
  Tauraco livingstonii livingstonii (G. R. Gray, 1864) -- valid
  Taurongia ambigua Gray, 2005 -- valid
  Taurotragus derbianus (Gray, 1847) -- valid -- Derby Eland, giant eland
  Taurotragus derbianus derbianus (Gray, 1847) -- valid -- western eland
  Taxidea americana californica Gray, 1865 -- invalid
  Tectura Gray, 1847 -- valid
  Tedania Gray, 1867 -- valid
  Tedania (Tedania) Gray, 1867 -- valid
  Teiidae Gray, 1827 -- valid -- Ameivas, Ground Lizards, New World Runners, Racerunners, Tegus, Whiptails
  Teira Gray, 1838 -- valid
  Telophorus multicolor (G. R. Gray, 1845) -- invalid
  Temera Gray, 1831 -- valid
  Temera hardwickii Gray, 1831 -- valid
  Tenrecidae Gray, 1821 -- valid
  Tenrecinae Gray, 1821 -- valid
  Tephrites Gray, 1832 -- invalid
  Terebra alba J. E. Gray, 1834 -- valid
  Terebratulidae Gray, 1840 -- valid
  Terrapene carolina mexicana (Gray, 1849) -- valid -- Mexican Box Turtle
  Testudinella Gray, 1870 -- invalid
  Testudo areolata pallida Gray, 1831 -- invalid
  Testudo arrau Humboldt in Gray, 1831 -- invalid
  Testudo bellii Gray, 1828 -- invalid
  Testudo dussumieri Gray, 1831 -- invalid
  Testudo geometrica nigriventris Gray, 1856 -- invalid
  Testudo gopher Gray, 1844 -- invalid
  Testudo hercules truncata Gray, 1830 -- invalid
  Testudo horsfieldii Gray, 1844 -- valid -- Central Asian Tortoise, Horsfield's Tortoise, Steppe Tortoise
  Testudo horsfieldii horsfieldii Gray, 1844 -- valid -- Central Asian Tortoise, Horsfield's Tortoise, Steppe Tortoise
  Testudo schweigeri Gray, 1830 -- invalid
  Testudo verreauxii Gray, 1870 -- invalid
  Tethyidae Gray, 1848 -- invalid
  Tethyidae Gray, 1848 -- valid
  Tetradactylus africanus (Gray, 1838) -- valid -- African Whip Lizard, Eastern Long-tailed Seps
  Tetradactylus africanus africanus (Gray, 1838) -- valid -- African Whip Lizard, Eastern Long-tailed Seps
  Tetraodon leiopleura Gray, 1830 -- invalid
  Tetraogallus J. E. Gray, 1832 -- valid
  Tetraogallus himalayensis G. R. Gray, 1843 -- valid -- Himalayan Snowcock
  Tetraogallus himalayensis himalayensis G. R. Gray, 1843 -- valid
  Tetrapturus herschelii Gray, 1838 -- invalid
  Tetrathyra Gray, 1865 -- invalid
  Tetrathyra baikii Gray, 1865 -- invalid
  Teuthis australis Gray, 1827 -- invalid
  Teuthis brevirostris Gronow in Gray, 1854 -- invalid
  Teuthis tubulosa Gronow in Gray, 1854 -- invalid
  Thais haemastoma canaliculata (J. E. Gray, 1839) -- invalid
  Thalotia Gray, 1840 -- valid
  Thecideidae Gray, 1840 -- valid
  Themiste Gray, 1828 -- valid
  Themiste (Themiste) Gray, 1828 -- valid
  Themiste hennahi Gray, 1828 -- valid
  Thenea Gray, 1867 -- valid
  Theonella Gray, 1868 -- valid
  Therlinya Gray & Smith, 2002 -- valid
  Therlinya angusta Gray & Smith, 2002 -- valid
  Therlinya ballata Gray & Smith, 2002 -- valid
  Therlinya bellinger Gray & Smith, 2002 -- valid
  Therlinya foveolata Gray & Smith, 2002 -- valid
  Therlinya horsemanae Gray & Smith, 2002 -- valid
  Therlinya kiah Gray & Smith, 2002 -- valid
  Therlinya lambkinae Gray & Smith, 2002 -- valid
  Therlinya monteithae Gray & Smith, 2002 -- valid
  Therlinya nasuta Gray & Smith, 2002 -- valid
  Therlinya vexillum Gray & Smith, 2002 -- valid
  Therlinya wiangaree Gray & Smith, 2002 -- valid
  Thermonectus marmoratus (Gray, 1831) -- valid
  Thermonetus marmoratus (Gray, 1831) -- invalid
  Thinornis G. R. Gray, 1845 -- valid
  Thoopterus nigrescens (Gray, 1870) -- valid -- Common Swift Fruit Bat, Swift Fruit Bat
  Thouarella Gray, 1870 -- valid
  Threskiornis G. R. Gray, 1842 -- valid
  Thrissocles hamiltonii (Gray, 1835) -- invalid
  Thryomanes sissonii (Grayson, 1868) -- invalid -- Chivirín de Socorro, Socorro Wren
  Thryssa hamiltonii Gray, 1835 -- valid -- anchois-moustache mamata, bocarte bolinado, Hamilton's thryssa
  Thylamys Gray, 1843 -- valid
  Thylogale Gray, 1837 -- valid -- pademelons
  Thylogale stigmatica coxenii (Gray, 1866) -- valid
  Tiliqua Gray, 1825 -- valid
  Tiliqua affinis Gray, 1838 -- invalid
  Tiliqua buchananii Gray, 1838 -- invalid
  Tiliqua fasciatus Gray, 1831 -- invalid
  Tiliqua microlepis Gray in Griffith, 1831 -- invalid
  Tiliqua rugosa (Gray, 1825) -- valid -- Pinecone Lizard, Shingle-Back, Shingleback Lizard, Sleepy Lizard, Stumpy Tail Lizard
  Tiliqua rugosa aspera Gray, 1845 -- valid
  Tiliqua rugosa rugosa (Gray, 1825) -- valid
  Timea Gray, 1867 -- valid
  Todarodes sloanei (Gray, 1849) -- invalid
  Todarodes sloanei sloanei (Gray, 1849) -- invalid
  Todus subulatus G. R. Gray, 1847 -- valid -- Barrancolí picogrueso, Broad-billed Tody, Todier à bec large
  Tolypeutinae Gray, 1865 -- valid
  Tomogaster eydouxii Gray, 1849 -- invalid
  Tonatia Gray, 1827 -- valid -- round-eared bats
  Tonia Gray, 1840 -- invalid
  Tonia atlantica Gray, 1840 -- invalid
  Tonicia Gray, 1847 -- valid
  Topaza G. R. Gray, 1840 -- valid
  Tor Gray, 1834 -- valid
  Toraster tuberculatus (Gray, 1847) -- valid
  Tortulosa Gray, 1847 -- valid
  Tosia Gray, 1840 -- valid
  Tosia aurata Gray, 1847 -- invalid
  Tosia australis Gray, 1840 -- valid
  Tosia grandis Gray, 1847 -- invalid
  Tosia rubra Gray, 1847 -- invalid
  Tosia tubercularis Gray, 1847 -- invalid
  Tosia tuberculata (Gray, 1847) -- invalid
  Touit G. R. Gray, 1855 -- valid
  Toxophora fulva Gray and Pidgeon, 1832 -- invalid
  Trachemys callirostris (Gray, 1856) -- valid -- Colombian Slider
  Trachemys callirostris callirostris (Gray, 1856) -- valid -- Colombian Slider
  Trachemys lineata Gray, 1873 -- invalid
  Trachemys ornata (Gray in Griffith and Pidgeon, 1830) -- valid -- Ornate Slider
  Trachemys ornata callirostris (Gray, 1856) -- invalid
  Trachemys scripta callirostris (Gray, 1856) -- invalid -- Columbian slider
  Trachemys venusta (Gray, 1856) -- valid -- Meso-American Slider
  Trachemys venusta venusta (Gray, 1856) -- valid -- Meso-American Slider
  Trachops Gray, 1847 -- valid -- Fringe-lipped Bat
  Trachylepis affinis (Gray, 1838) -- valid -- Senegal Mabuya
  Trachylepis capensis (Gray, 1831) -- valid -- Cape Skink, Cape Three-lined Skink
  Trachylepis maculata (Gray, 1839) -- valid -- Spotted Mabuya
  Trachylepis maculilabris (Gray, 1845) -- valid -- Speckle-lipped Mabuya, Speckled-lipped Skink
  Tragopan melanocephalus (J. E. Gray, 1829) -- valid -- Western Tragopan, Western Tragopan Pheasant
  Tragopan temminckii (J. E. Gray, 1831) -- valid -- Temminck's Tragopan
  Tragulus kanchil affinis Gray, 1861 -- valid
  Tragulus kanchil fulviventer Gray, 1836 -- valid
  Tragulus napu stanleyanus Gray, 1836 -- valid
  Tralia Gray, 1840 -- valid
  Transennella confusa S. Gray, 1982 -- invalid -- confusing transennella
  Tresus Gray, 1853 -- valid
  Triakidae Gray, 1851 -- valid -- cazones, émissoles, hound sharks, houndsharks, smooth dogfishes, smooth-hounds, topes, whiskery sharks
  Trichiurus armatus Gray, 1831 -- invalid
  Trichiurus intermedius Gray, 1831 -- invalid
  Trichiurus muticus Gray, 1831 -- invalid
  Trichoglossus forsteni mitchellii G. R. Gray, 1859 -- valid
  Trichoglossus haematodus nigrogularis G. R. Gray, 1858 -- valid
  Trichotropidae Gray, 1850 -- invalid
  Tridonta arctica (J. E. Gray, 1824) -- invalid -- arctic tridonta
  Trigonocephalus affinis Gray, 1849 -- invalid
  Trigonocephalus purpureomaculatus Gray, 1832 -- invalid
  Trigonocephalus zara Gray, 1849 -- invalid
  Trimeresurus (Parias) Gray, 1849 -- valid
  Trimeresurus albolabris Gray, 1842 -- valid -- White-lipped Pitviper, White-lipped Tree Viper
  Trimeresurus albolabris albolabris Gray, 1842 -- invalid
  Trimeresurus elegans (Gray, 1849) -- invalid
  Trimeresurus flavomaculatus (Gray, 1842) -- valid -- Philippine Pitviper
  Trimeresurus flavomaculatus flavomaculatus (Gray, 1842) -- invalid
  Trimeresurus philippensis Gray, 1842 -- invalid
  Trimeresurus purpureomaculatus (Gray, 1832) -- valid -- Mangrove Viper, Shore Pit Viper
  Trimeresurus purpureomaculatus purpureomaculatus (Gray, 1832) -- invalid
  Trimeresurus strigatus Gray, 1842 -- valid -- Horseshoe Pitviper
  Trimeresurus subannulatus Gray, 1842 -- invalid
  Trioceros melleri (Gray, 1865) -- valid -- Meller's Chameleon
  Trioceros oweni (Gray, 1831) -- valid -- Owen's Chameleon
  Trionychidae Gray, 1825 -- valid -- Softshell Turtles
  Trionychinae Gray, 1825 -- valid
  Trionychoidea Gray, 1825 -- valid
  Trionyx bellii Gray, 1872 -- invalid
  Trionyx cariniferus Gray, 1856 -- invalid
  Trionyx dillwynii Gray, 1873 -- invalid
  Trionyx frenatus Gray, 1856 -- invalid
  Trionyx hurum Gray, 1830 -- invalid -- Peacock Softshell Turtle
  Trionyx javanicus Gray, 1830 -- invalid
  Trionyx jeudi Gray, 1869 -- invalid
  Trionyx niloticus Gray, 1831 -- invalid
  Trionyx occellatus Gray, 1830 -- invalid
  Trionyx ornatus Gray, 1861 -- invalid
  Trionyx peguensis Gray, 1870 -- invalid
  Trionyx sewaare Gray, 1872 -- invalid
  Triphoridae Gray, 1847 -- valid
  Tristella Gray, 1850 -- invalid
  Triton chinensis (Gray, 1859) -- invalid
  Triton sinesis (Gray, 1859) -- invalid
  Triton vittatus Gray in Jenyns, 1835 -- invalid
  Triton vittatus vittatus Gray in Jenyns, 1835 -- invalid
  Trituroides chinensis (Gray, 1859) -- invalid
  Triturus chinensis (Gray, 1859) -- invalid
  Triturus sinensis (Gray, 1859) -- invalid
  Triturus vittatus (Gray in Jenyns, 1835) -- invalid
  Triturus vittatus vittatus (Gray in Jenyns, 1835) -- invalid
  Triumphis Gray, 1857 -- valid
  Trivia californiana (Gray, 1827) -- valid -- california trivia
  Trivia quadripunctata (Gray, 1827) -- valid -- four-spot trivia
  Trivia suffusa (Gray, 1832) -- valid -- pink trivia
  Troglodytes sissonii (Grayson, 1868) -- valid -- Chivirín de Socorro, Socorro Wren
  Trogonophidae Gray, 1865 -- valid -- Palearctic Worm Lizards, Shorthead Worm Lizards
  Tropidolaemus philippensis (Gray, 1842) -- valid -- South Philippine Temple Pitviper
  Tropidolaemus subannulatus (Gray, 1842) -- valid -- North Philippine Temple Pitviper
  Tropidonophis mairii (Gray, 1841) -- valid -- Common Keelback, Mair's Keelback
  Tropidonophis mairii mairii (Gray, 1841) -- valid
  Tropidonotus mairii Gray, 1841 -- invalid
  Tropidophorus brookei (Gray, 1845) -- valid -- Brook's Keeled Skink
  Tropidorhynchus inornatus G. R. Gray, 1846 -- invalid
  Tropidorhynchus plumigenis G. R. Gray, 1858 -- invalid
  Tropidosaura montana (Gray in Griffith, 1831) -- valid -- Common Mountain Lizard, Green-striped Mountain Lizard
  Tropidosaura montana montana (Gray in Griffith, 1831) -- valid -- Green-striped Mountain Lizard
  Truebella Graybeal and Cannatella, 1995 -- valid
  Truebella skoptes Graybeal and Cannatella, 1995 -- valid
  Truebella tothastes Graybeal and Cannatella, 1995 -- valid
  Trugon G. R. Gray, 1849 -- valid
  Trugon terrestris G. R. Gray, 1849 -- valid -- Thick-billed Ground Pigeon
  Trugon terrestris terrestris G. R. Gray, 1849 -- valid
  Trulla abbreviata (Gray, 1834) -- invalid -- smallscale flatfish, tonguesole
  Truncatellidae Gray, 1840 -- valid
  Tucuxa Gray, 1866 -- invalid
  Tugali Gray In Dieffenbach, 1843 -- valid
  Tupaia splendidula Gray, 1865 -- valid -- Ruddy Tree Shrew, Ruddy Treeshrew
  Tupaia splendidula splendidula Gray, 1865 -- valid
  Tupaiidae Gray, 1825 -- valid
  Tupaiinae Gray, 1825 -- invalid
  Turdus rubrocanus J. E. Gray & G. R. Gray, 1847 -- valid -- Chestnut Thrush
  Turdus rubrocanus rubrocanus J. E. Gray & G. R. Gray, 1847 -- valid
  Tylodinidae Gray, 1847 -- valid
  Tylomys panamensis (Gray, 1873) -- valid -- Panamá Climbing Rat, Panamanian climbing rat
  Typhlops ruficaudus (Gray, 1845) -- invalid
  Tyrse Gray, 1844 -- invalid
  Tyrse argus Gray, 1844 -- invalid
  Tyrse perocellata Gray, 1844 -- invalid
  Tyto alba punctatissima (Gould & G. R. Gray, 1838) -- invalid
  Tyto alba tuidara (J. E. Gray, 1828) -- invalid
  Tyto furcata punctatissima (Gould & G. R. Gray, 1838) -- valid
  Tyto furcata tuidara (J. E. Gray, 1828) -- valid
  Umbellulariidae Gray, 1840 -- invalid
  Uncia Gray, 1854 -- valid
  Unio aucklandicus Gray, 1843 -- invalid
  Unio borealis Gray, 1882 -- invalid
  Unio chilensis Gray, 1828 -- invalid
  Unio menziesii Gray, 1843 -- invalid
  Unio novaehollandiae Gray, 1834 -- invalid
  Uniophora Gray, 1840 -- valid
  Uniophora globifera Gray, 1840 -- invalid
  Uperoleia Gray, 1841 -- valid
  Uperoleia marmorata Gray, 1841 -- valid
  Uperoleia marmorata marmorata Gray, 1841 -- invalid
  Uromys aruensis Gray, 1873 -- invalid
  Uropeltis ellioti (Gray, 1858) -- valid -- Elliot's Earth Snake
  Uropeltis melanogaster (Gray, 1858) -- invalid
  Uroteuthis chinensis (Gray, 1849) -- valid
  Ursus arctos lasiotus Gray, 1867 -- valid
  Valvatidae Gray, 1840 -- valid -- valve snails
  Vandeleuria Gray, 1842 -- valid -- Long-tailed Climbing Mice
  Vanikoridae Gray, 1845 -- valid
  Varanus flavescens (Hardwicke and Gray, 1827) -- valid -- Short-toed Monitor, Yellow Monitor
  Varanus giganteus (Gray, 1845) -- valid
  Varanus gouldii (Gray, 1838) -- valid
  Varanus nebulosus (Gray, 1831) -- valid
  Varanus rudicollis (Gray, 1845) -- valid
  Varanus timorensis (Gray, 1831) -- valid
  Varecia Gray, 1863 -- valid -- ruffed lemurs
  Vazella Gray, 1870 -- valid
  Velutinidae Gray, 1840 -- valid
  Vermicella Gray in Günther, 1858 -- valid
  Vermicella annulata (Gray in Gray, 1841) -- valid -- Bandy Bandy, Eastern Bandy-bandy
  Vespadelus pumilus (Gray, 1841) -- valid -- Eastern Forest Bat, Little Brown Bat
  Vespertilio muricola Gray, 1846 -- invalid
  Vespertilionidae Gray, 1821 -- valid -- evening bats, vesper bats, vespertilionid bats
  Vespertilioninae Gray, 1821 -- valid
  Vespertilionini Gray, 1821 -- valid
  Vespertilionoidea Gray, 1821 -- valid
  Vipera xanthina (Gray, 1849) -- invalid
  Vipera xanthina xanthina (Gray, 1849) -- invalid
  Vison Gray, 1843 -- invalid
  Viverra tangalunga Gray, 1832 -- valid -- Malayan Civet
  Viverra tangalunga tangalunga Gray, 1832 -- valid
  Viverricula indica pallida (Gray, 1831) -- valid
  Viverridae Gray, 1821 -- valid
  Viverrinae Gray, 1821 -- valid
  Viviparidae Gray, 1847 -- valid
  Viviparinae Gray, 1847 -- valid
  Volutomitridae Gray, 1854 -- valid
  Vulpes vulpes dorsalis (J. E. Gray, 1838) -- valid
  Vulpes vulpes flavescens J. E. Gray, 1843 -- valid
  Vulpes vulpes japonica J. E. Gray, 1868 -- valid
  Wagleria dorsalis (Gray, 1841) -- invalid
  Wandella Gray, 1994 -- valid
  Wandella alinjarra Gray, 1994 -- valid
  Wandella barbarella Gray, 1994 -- valid
  Wandella centralis Gray, 1994 -- valid
  Wandella diamentina Gray, 1994 -- valid
  Wandella murrayensis Gray, 1994 -- valid
  Wandella orana Gray, 1994 -- valid
  Wandella pallida Gray, 1994 -- valid
  Wandella parnabyi Gray, 1994 -- valid
  Wandella stuartensis Gray, 1994 -- valid
  Wandella waldockae Gray, 1994 -- valid
  Woodworthia maculatus (Gray, 1845) -- valid
  Xanthotis polygramma (G. R. Gray, 1862) -- invalid
  Xanthotis polygrammus (G. R. Gray, 1862) -- valid -- Méliphage moucheté, Mielero manchado, Spotted Honeyeater
  Xanthotis polygrammus polygrammus (G. R. Gray, 1862) -- valid
  Xenicus G. R. Gray, 1855 -- valid
  Xenicus longipes stokesii G. R. Gray, 1862 -- valid
  Xenopus tropicalis (Gray, 1864) -- valid
  Xenosaurus grandis (Gray, 1856) -- valid -- Knob-scaled Lizard, Xenosaurio mayor
  Xenosaurus grandis grandis (Gray, 1856) -- valid
  Xenospongia Gray, 1858 -- valid
  Xiphocolaptes promeropirhynchus lineatocephalus (G. R. Gray, 1847) -- valid
  Yardiella Gray, 1994 -- valid
  Yardiella humphreysi Gray, 1994 -- valid
  Yoldia glacialis Gray, 1828 -- valid
  Zarhynchus wagleri (G. R. Gray, 1845) -- invalid -- Chestnut-headed Oropendola
  Zelurus spinidorsis (Gray, 1832) -- valid
  Ziphiidae Gray, 1865 -- invalid
  Ziphiidae Gray, 1850 -- invalid -- beaked whales
  Ziphius layardii Gray, 1865 -- invalid
  Ziphius sechellensis Gray, 1846 -- invalid
  Zirfaea Gray, 1842 -- valid
  Zonosaurus madagascariensis (Gray, 1831) -- valid -- Madagascar Girdled Lizard
  Zonosaurus madagascariensis madagascariensis (Gray, 1831) -- valid
  Zonosaurus ornatus (Gray, 1831) -- valid -- Ornate Girdled Lizard
  Zorilla albinucha Gray, 1864 -- invalid
  Zosterops atriceps G. R. Gray, 1861 -- valid -- Cream-throated White-eye
  Zosterops atriceps atriceps G. R. Gray, 1861 -- valid
  Zosterops griseotinctus G. R. Gray, 1858 -- valid -- Islet White-eye
  Zosterops griseotinctus griseotinctus G. R. Gray, 1858 -- valid
  Zosterops lateralis griseonota G. R. Gray, 1859 -- valid
  Zosterops lateralis melanops G. R. Gray, 1860 -- valid
  Zosterops melanocephalus G. R. Gray, 1862 -- valid
  Zosterops xanthochroa G. R. Gray, 1859 -- valid
  Zosterops xanthochrous G. R. Gray, 1859 -- invalid
 
 Kingdom Fungi
  Albugo S. F. Gray, 1821 -- accepted
  Albugo cruciferarum S. F. Gray -- accepted
  Cladosporium herbarum (Pers.) Link Ex S. F. Gray -- accepted
  Leiophloea S. F. Gray, 1821 -- accepted
  Leiophloea analepta (Ach.) S. F. Gray -- accepted
  Leptogium (Ach.) Gray -- accepted
  Placynthium (Ach.) Gray -- accepted
  Placynthium nigrum (Huds.) Gray -- accepted
  Polychidium (Ach.) Gray -- accepted
  Polychidium muscicola (Sw.) Gray -- accepted
  Protomycetaceae Gray, 1821 -- accepted
  Psoroma hypnorum (Vahl) Gray -- accepted
  Rinodina (Ach.) Gray -- accepted
  Rinodina exigua (Ach.) Gray -- accepted
 
 Kingdom Plantae
  Abronia cycloptera A. Gray -- not accepted
  Abutilon berlandieri A. Gray ex S. Watson -- accepted -- Berlandier's Indian mallow
  Abutilon hulseanum (Torr. & A. Gray) Torr. ex A. Gray -- accepted -- mauve
  Abutilon hypoleucum A. Gray -- accepted -- whiteleaf Indian mallow
  Abutilon palmeri A. Gray -- accepted -- Palmer's Indian mallow
  Abutilon parvulum A. Gray -- accepted -- dwarf abutilon, dwarf Indian mallow
  Abutilon sonorae A. Gray -- not accepted
  Abutilon texense Torr. & A. Gray -- not accepted
  Abutilon thurberi A. Gray -- not accepted -- Thurber's Indian mallow
  Abutilon wrightii A. Gray -- accepted -- Wright's abutilon, Wright's Indian mallow
  Acacia angustissima var. texensis (Torr. & A. Gray) Isely -- accepted -- prairie wattle, whiteball acacia
  Acacia greggii A. Gray -- not accepted -- catclaw, catclaw acacia, devilsclaw, Gregg's catclaw, Texas catclaw
  Acacia greggii var. greggii A. Gray -- not accepted -- Arizona acacia, catclaw, catclaw acacia, catclaw mimosa
  Acacia koa A. Gray -- accepted -- koa
  Acacia richii A. Gray -- accepted -- Tasmanian wattle
  Acacia texensis Torr. & A. Gray -- not accepted
  Acaena exigua A. Gray -- accepted -- liliwai
  Acaena exigua var. exigua A. Gray -- not accepted
  Acalypha gracilens A. Gray -- accepted -- slender copperleaf, slender threeseed mercury
  Acalypha gracilens ssp. monococca (Engelm. ex A. Gray) G.L. Webster -- not accepted
  Acalypha gracilens var. gracilens A. Gray -- not accepted -- slender threeseed mercury
  Acalypha gracilens var. monococca Engelm. ex A. Gray -- not accepted
  Acalypha monococca (Engelm. ex A. Gray) Lill. W. Mill. & Gandhi -- accepted -- slender threeseed mercury
  Acalypha virginica var. gracilens (A. Gray) Müll. Arg. -- not accepted
  Acalypha virginica var. monococca (Engelm. ex A. Gray) Müll. Arg. -- not accepted
  Acamptopappus (A. Gray) A. Gray -- accepted -- goldenhead
  Acamptopappus shockleyi A. Gray -- accepted -- Shockley's goldenhead
  Acamptopappus sphaerocephalus (Harv. & A. Gray ex A. Gray) A. Gray -- accepted -- rayless goldenhead
  Acamptopappus sphaerocephalus var. sphaerocephalus (Harv. & A. Gray ex A. Gray) A. Gray -- accepted -- rayless goldenhead
  Acanthogonum polygonoides (Torr. & A. Gray) Goodman -- not accepted
  Acanthomintha (A. Gray) A. Gray -- accepted -- thorn-mint, thornmint
  Acanthomintha ilicifolia (A. Gray) A. Gray -- accepted -- San Diego thorn-mint, San Diego thornmint
  Acer californica (Torr. & A. Gray) Wesm. -- not accepted
  Acer californicum (Torr. & A. Gray) D. Dietr. -- not accepted
  Acer glabrum var. tripartitum (Nutt. ex Torr. & A. Gray) Pax -- not accepted
  Acer negundo ssp. californicum (Torr. & A. Gray) Wesm. -- not accepted
  Acer negundo var. californicum (Torr. & A. Gray) Sarg. -- accepted -- box elder, California boxelder
  Acer rubrum var. trilobum Torr. & A. Gray ex K. Koch -- accepted -- red maple
  Acer tripartitum Nutt. ex Torr. & A. Gray -- not accepted
  Acerates viridiflora var. linearis A. Gray -- not accepted
  Achillea millefolium var. rosea (Desf.) Torr. & A. Gray -- not accepted
  Achyranthes mutica A. Gray -- accepted -- blunt chaff flower
  Achyronychia Torr. & A. Gray -- accepted
  Achyronychia cooperi Torr. & A. Gray -- accepted -- Cooper's frostmat, onyxflower
  Acleisanthes A. Gray -- accepted -- trumpets
  Acleisanthes anisophylla A. Gray -- accepted -- obliqueleaf trumpets
  Acleisanthes berlandieri A. Gray -- not accepted
  Acleisanthes chenopodioides (A. Gray) R.A. Levin -- accepted -- goosefoot moonpod
  Acleisanthes crassifolia A. Gray -- accepted -- Texas trumpets
  Acleisanthes diffusa (A. Gray) R.A. Levin -- accepted -- spreading moonpod
  Acleisanthes longiflora A. Gray -- accepted -- angel trumpet, angel's trumpets
  Acleisanthes wrightii (A. Gray) Benth. & Hook. f. ex Hemsl. -- accepted -- Wright's trumpets
  Acmispon argophyllus (A. Gray) Brouillet -- accepted -- silver bird's-foot trefoil
  Acmispon argophyllus var. argophyllus (A. Gray) Brouillet -- accepted -- silver bird's-foot trefoil
  Acmispon argophyllus var. fremontii (A. Gray) Brouillet -- accepted -- Fremont's birdsfoot trefoil
  Acmispon heermannii var. orbicularis (A. Gray) Brouillet -- accepted -- Heermann's bird's-foot trefoil
  Acmispon wrightii (A. Gray) Brouillet -- accepted -- Wright's deervetch
  Acnida australis A. Gray -- not accepted
  Aconitum noveboracense A. Gray ex Coville -- not accepted -- northern blue monkshood, northern wild monkshood
  Aconitum reclinatum A. Gray -- accepted -- trailing white monkshood
  Aconitum uncinatum ssp. noveboracense (A. Gray ex Coville) Hardin -- not accepted
  Aconogonon davisiae (W.H. Brewer ex A. Gray) Soják -- accepted -- Davis' knotweed
  Aconogonon davisiae var. davisiae (W.H. Brewer ex A. Gray) Soják -- accepted -- Davis' knotweed
  Aconogonum davisiae (W.H. Brewer ex A. Gray) Soják -- not accepted
  Acourtia nana (A. Gray) Reveal & King -- accepted -- desert holly, dwarf desertpeony
  Acourtia thurberi (A. Gray) Reveal & King -- accepted -- Thurber's desertpeony
  Acourtia wrightii (A. Gray) Reveal & King -- accepted -- brownfoot, pink perezzia, Wright's desertpeony
  Acronychia heterophylla A. Gray -- accepted
  Actaea racemosa var. dissecta (A. Gray) J. Compton -- not accepted
  Actinea cooperi (A. Gray) Kuntze -- not accepted
  Actinea grandiflora (Torr. & A. Gray ex A. Gray) Kuntze -- not accepted
  Actinea vaseyi (A. Gray) Kuntze -- not accepted
  Actinella argentea A. Gray -- not accepted
  Actinella richardsonii var. floribunda A. Gray -- not accepted
  Actinomeris longifolia A. Gray -- not accepted
  Actinospermum angustifolium (Pursh) Torr. & A. Gray -- not accepted
  Acuan leptolobum (Torr. & A. Gray) Kuntze -- not accepted
  Adenophyllum cooperi (A. Gray) Strother -- accepted -- Cooper's dogweed, Cooper's dyssodia
  Adenophyllum porophylloides (A. Gray) Strother -- accepted -- San Felipe dogweed, San Felipe dyssodia
  Adenophyllum wrightii A. Gray -- accepted -- Wright's dogweed
  Aesculus pavia var. discolor (Pursh) A. Gray -- not accepted
  Afrocarpus (J. Buchholz & E.G. Gray) C.N. Page -- accepted -- yellowwood
  Agalinis paupercula (A. Gray) Britton -- not accepted -- smallflower false foxglove
  Agalinis paupercula var. paupercula (A. Gray) Britton -- not accepted -- smallflower false foxglove
  Agassizia suavis A. Gray & Engelm. -- not accepted
  Agastache breviflora (A. Gray) Epling -- accepted -- Trans-Pecos giant hyssop
  Agastache breviflora var. havardii (A. Gray) Shinners -- not accepted
  Agastache micrantha (A. Gray) Wooton & Standl. -- accepted -- white giant hyssop
  Agastache pallidiflora ssp. havardii (A. Gray) Lint & Epling -- not accepted
  Agastache pallidiflora ssp. neomexicana var. havardii (A. Gray) R.W. Sanders -- not accepted -- Bill Williams Mountain giant hyssop, Havard's giant hyssop
  Agastache pallidiflora var. havardii (A. Gray) R.W. Sanders -- accepted -- Bill Williams Mountain giant hyssop
  Ageratina altissima var. angustata (A. Gray) Clewell & Woot. -- not accepted -- white snakeroot
  Ageratina aromatica var. incisa (A. Gray) C.F. Reed -- not accepted -- lesser snakeroot
  Ageratina herbacea (A. Gray) King & H. Rob. -- accepted -- fragrant snakeroot, herbaceous joepyeweed
  Ageratina paupercula (A. Gray) King & H. Rob. -- accepted -- Santa Rita snakeroot
  Ageratina rothrockii (A. Gray) King & H. Rob. -- accepted -- Rothrock's snakeroot
  Ageratina wrightii (A. Gray) King & H. Rob. -- accepted -- Wright's snakeroot
  Ageratum littorale A. Gray -- not accepted -- Cape Sable whiteweed
  Agnorhiza bolanderi (A. Gray) W.A. Weber -- accepted -- Bolander's mule-ears
  Agnorhiza ovata (Torr. & A. Gray ex Torr.) W.A. Weber -- accepted -- southern mule-ears
  Agoseris alpestris (A. Gray) Greene -- not accepted
  Agoseris aurantiaca ssp. purpurea (A. Gray) G.W. Douglas -- not accepted
  Agoseris aurantiaca var. purpurea (A. Gray) Cronquist -- accepted -- orange agoseris, pale agoseris
  Agoseris barbellulata (Greene ex A. Gray) Greene -- not accepted
  Agoseris glauca var. dasycephala (Torr. & A. Gray) Jeps. -- accepted -- pale agoseris, pale goat-chicory
  Agrimonia eupatoria var. mollis Torr. & A. Gray -- not accepted
  Agrimonia incisa Torr. & A. Gray -- accepted -- incised agrimony, incised groovebur
  Agrimonia mollis (Torr. & A. Gray) Britton -- not accepted
  Agrostis alba var. aristata A. Gray -- not accepted
  Agrostis alopecuroides (Buckley) A. Gray -- not accepted
  Agrostis barbata Buckley ex A. Gray -- not accepted
  Agrostis heterolepis (A. Gray) Alph. Wood -- not accepted
  Agrostis laxa Gray -- not accepted
  Agrostis michauxii var. laxiflora (Michaux) A. Gray -- not accepted
  Agrostis oregonensis Nutt. ex A. Gray -- not accepted
  Agrostis scabrata Nutt. ex A. Gray -- not accepted
  Agrostis vulgaris var. aristata A. Gray -- not accepted
  Aira caespitosa var. arctica (Spreng.) Thurb. ex A. Gray -- not accepted
  Aldenella tenuifolia (Torr. & A. Gray) Greene -- not accepted
  Alectoroctonum wrightii (Torr. & A. Gray) Klotzsch & Garcke -- not accepted
  Aletes anisatus (A. Gray) W.L. Theob. & C.C. Tseng -- accepted -- Rocky Mountain Indian parsley
  Aletes nuttallii (A. Gray) W.A. Weber -- not accepted
  Aletes tenuifolius (Nutt. ex Torr. & A. Gray) W.A. Weber -- not accepted
  Aliciella caespitosa (A. Gray) J.M. Porter -- accepted -- Rabbit Valley gilia, wonderland Alice-flower
  Aliciella cespitosa (A. Gray) J.M. Porter -- not accepted -- wonderland Alice-flower
  Aliciella haydenii (A. Gray) J.M. Porter -- accepted -- San Juan gilia
  Aliciella leptomeria (A. Gray) J.M. Porter -- accepted -- sand gilia
  Aliciella micromeria (A. Gray) J.M. Porter -- accepted -- dainty gilia
  Aliciella pinnatifida (Nutt. ex A. Gray) J.M. Porter -- accepted -- sticky gilia
  Aliciella stenothyrsa (A. Gray) J.M. Porter -- accepted -- Uinta Basin gilia
  Aliciella subnuda (Torr. ex A. Gray) J.M. Porter -- accepted -- coral gilia
  Alisma lanceolatum A. Gray -- not accepted -- lanceleaf water plantain
  Allioniella oxybaphoides (A. Gray) Rydb. -- not accepted
  Allium occidentale A. Gray -- not accepted
  Allocarya glaber (A. Gray) J.F. Macbr. -- not accepted
  Allocarya greenei (A. Gray) Greene -- not accepted
  Allocarya lithocarya Greene ex A. Gray -- not accepted
  Allocarya mollis (A. Gray) Greene -- not accepted
  Allocarya trachycarpa (A. Gray) Greene -- not accepted
  Allotropa Torr. & A. Gray ex A. Gray -- accepted -- sugar stick, sugarstick
  Allotropa virgata Torr. & A. Gray ex A. Gray -- accepted -- sugarstick
  Aloysia wrightii (A. Gray) A. Heller -- accepted -- lemon verbena, mintbush lippia, Wright's aloysia, Wright's beebrush, Wright's lippia
  Alyxia oliviformis var. myrtillifolia A. Gray ex Hillebr. -- not accepted
  Amaranthus australis (A. Gray) J.D. Sauer -- accepted -- southern amaranth
  Amaranthus obcordatus (A. Gray) Standl. -- accepted -- Trans-Pecos amaranth
  Amaranthus torreyi (A. Gray) Benth. ex S. Watson -- accepted -- Torrey's amaranthus
  Amaranthus torreyi auct. non (A. Gray) Benth. ex S. Watson -- not accepted
  Amaranthus torreyi auct. non (A. Gray) Benth. ex S. Watson -- not accepted
  Amauria dissecta A. Gray -- not accepted
  Amauriopsis dissecta (A. Gray) Rydb. -- accepted -- ragleaf bahia
  Ambrosia canescens A. Gray -- accepted -- hairy ragweed
  Ambrosia cheiranthifolia A. Gray -- accepted -- Rio Grande ragweed, South Texas ambrosia
  Ambrosia cordifolia (A. Gray) Payne -- accepted -- heartleaf bursage, Tucson bur ragweed, Tucson burr ragweed
  Ambrosia coronopifolia Torr. & A. Gray -- not accepted
  Ambrosia dumosa (A. Gray) Payne -- accepted -- burrobush, white bursage
  Ambrosia eriocentra (A. Gray) Payne -- accepted -- hollyleaf bursage, woolly bursage, woolly fruit bur ragweed, woolly fruit burr ragweed, wooly bursage
  Ambrosia ilicifolia (A. Gray) Payne -- accepted -- hollyleaf bur ragweed, hollyleaf burr ragweed, hollyleaf bursage
  Ambrosia monogyra (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- singlewhorl burrobrush
  Ambrosia psilostachya var. coronopifolia (Torr. & A. Gray) Farw. -- not accepted
  Ambrosia pumila (Nutt.) A. Gray -- accepted -- dwarf bur ragweed, dwarf burr ragweed, San Diego ambrosia, San Diego ragweed
  Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- accepted -- burrobrush
  Ambrosia salsola var. salsola (Torr. & A. Gray) Strother & B.G. Baldw. -- not accepted
  Ambrosia trifida var. integrifolia (Muhl. ex Willd.) Torr. & A. Gray -- not accepted
  Amelanchier alnifolia var. pumila (Torr. & A. Gray) C.K. Schneid. -- accepted -- dwarf serviceberry
  Amelanchier canadensis var. pumila Torr. & A. Gray -- not accepted -- Canadian serviceberry
  Amelanchier oblongifolia (Torr. & A. Gray) M. Roem. -- not accepted
  Amelanchier pumila (Torr. & A. Gray) Nutt. ex M. Roem. -- not accepted -- dwarf serviceberry
  Amianthium A. Gray -- accepted -- amianthium
  Amianthium muscaetoxicum (Walter) A. Gray -- not accepted -- flypoison
  Amianthium muscitoxicum (Walter) A. Gray -- accepted -- flypoison
  Ammobroma Torr. ex A. Gray -- not accepted
  Ammobroma sonorae Torr. ex A. Gray -- not accepted
  Ammocodon chenopodioides (A. Gray) Standl. -- not accepted -- goosefoot moonpod
  Ammoselinum Torr. & A. Gray -- accepted -- sandparsley
  Ammoselinum popei Torr. & A. Gray -- accepted -- plains sandparsley
  Amoreuxia malvifolia A. Gray -- accepted
  Amoreuxia wrightii A. Gray -- accepted -- Wright's yellowshow
  Amorpha paniculata Torr. & A. Gray -- accepted -- panicled false indigo, panicled indigobush
  Amphicarpaea pitcheri Torr. & A. Gray -- not accepted
  Amphipappus Torr. & A. Gray -- accepted -- amphipappus, chaffbush
  Amphipappus fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaffbush, Fremont's chaffbush
  Amphipappus fremontii ssp. fremontii Torr. & A. Gray ex A. Gray -- not accepted -- Fremont's chaffbush
  Amphipappus fremontii var. fremontii Torr. & A. Gray ex A. Gray -- accepted -- chaff-bush, Fremont's chaffbush
  Amsinckia echinata A. Gray -- not accepted
  Amsinckia grandiflora (Kleeb. ex A. Gray) Kleeb. ex Greene -- accepted -- large-flowered fiddleneck, largeflowered fiddleneck
  Amsinckia intermedia var. echinata (A. Gray) Wiggins -- not accepted
  Amsinckia spectabilis var. bracteosa (A. Gray) B. Boivin -- not accepted
  Amsinckia tessellata A. Gray -- accepted -- bristly fiddleneck, western fiddleneck
  Amsinckia tessellata var. tessellata A. Gray -- accepted -- bristly fiddleneck
  Amsonia brevifolia A. Gray -- not accepted
  Amsonia ciliata var. texana (A. Gray) J.M. Coult. -- accepted -- Texas bluestar
  Amsonia palmeri A. Gray -- accepted -- Palmer's bluestar
  Anaphalis margaritacea var. subalpina A. Gray -- not accepted
  Ancistrocarphus A. Gray -- accepted -- neststraw, woolly fishhooks
  Ancistrocarphus filagineus A. Gray -- accepted -- false neststraw, hooded neststraw
  Androsace arizonica A. Gray -- not accepted
  Androsace laevigata (A. Gray) Wendelbo -- accepted -- cliff dwarf-primrose
  Androsace montana (A. Gray) Wendelbo -- accepted -- Rocky Mountain dwarf-primrose
  Androsace occidentalis var. arizonica (A. Gray) H. St. John -- not accepted
  Androsace septentrionalis ssp. subulifera (A. Gray) G.T. Robbins -- not accepted -- pygmyflower rockjasmine
  Androsace septentrionalis var. subulifera A. Gray -- not accepted
  Anelsonia eurycarpa (A. Gray) J.F. Macbr. & Payson -- accepted -- broad pod anelsonia, daggerpod
  Anemone cylindrica A. Gray -- accepted -- candle anemone, cottonweed
  Anemone decapetala var. heterophylla (Torr. & A. Gray) Britton & Rusby -- not accepted
  Anemone globosa (Torr. & A. Gray) Nutt. ex Pritz. -- not accepted
  Anemone heterophylla Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Anemone heterophyllum Nutt. ex Torr. & A. Gray (pro. syn.) -- not accepted
  Anemone multifida ssp. globosa (Torr. & A. Gray) Torr. & A. Gray -- not accepted
  Anemone multifida var. globosa Torr. & A. Gray -- not accepted
  Anemone oregana A. Gray -- accepted -- blue windflower
  Anemone oregana var. oregana A. Gray -- accepted -- blue windflower