Ga
- Gallotia
- Gambelia
- Garthius
- Gastropholis
- Gavialidae
- Gavialis
Ge
- Geagras
- Geckoella
- Geckolepis
- Gehyra
- Gekko
- Gekkonidae
- Geocalamus
- Geochelone
- Geoclemys
- Geoemyda
- Geoemydidae
Tribus Geoemydinei Theobald 1868
- niži taksoni: Chersina, Testudininei
Reptilia → Testudines → Testudinidae → Testudininae
- Geomyersia
- Geophis
- Geoscincus
- Gerarda
- Gerrhonotus
- Gerrhopilidae
- Gerrhopilus
- Gerrhosauridae
- Gerrhosaurus
Gl
- Glaphyromorphus
Gloydius Hoge & Romano-Hoge, 1981
- Gloydius blomhoffii (Boie, 1826)
- Gloydius blomhoffii blomhoffii (Boie, 1826)
- Gloydius blomhoffii dubitatus (Gloyd, 1977)
- Gloydius brevicaudus (Stejneger, 1907)
- Gloydius brevicaudus brevicaudus (Stejneger, 1907)
- Gloydius brevicaudus siniticus (Gloyd, 1977)
- Gloydius halys (Pallas, 1776)
- Gloydius halys affinis (Gray, 1849)
- Gloydius halys boehmei Nilson, 1983
- Gloydius halys caraganus (Eichwald, 1831)
- Gloydius halys caucasicus (Nikolsky, 1916)
- Gloydius halys cognatus (Gloyd, 1977)
- Gloydius halys halys (Pallas, 1776)
- Gloydius halys mogoi (Bour, 1993)
- Gloydius halys stejnegeri (Rendahl, 1933)
- Gloydius himalayanus (Günther, 1864)
- Gloydius intermedius (Strauch, 1868)
- Gloydius lijianlii Jiang & Zhao, 2009
- Gloydius liupanensis Liu, Song & Luo, 1989
- Gloydius monticola (Werner, 1922)
- Gloydius saxatilis (Emelianov, 1937)
- Gloydius saxatilis changdaoensis Li, 1999
- Gloydius saxatilis saxatilis (Emelianov, 1937)
- Gloydius shedaoensis (Zhao, 1979)
- Gloydius shedaoensis qianshanensis Li, 1999
- Gloydius shedaoensis shedaoensis (Zhao, 1979)
- Gloydius strauchi (Bedriaga, 1912)
- Gloydius tsushimaensis (Isogawa, Moriya & Mitsui, 1994)
- Gloydius ussuriensis (Emelianov, 1929)
Reptilia → Squamata → Viperidae
- Glyptemys
Gn
†Gnatusuchus Salas-Gismondi et al. 2015
- †Gnatusuchus pebasensis Salas-Gismondi et al. 2015
Reptilia → Globidonta → Caimaninae
- Gnypetoscincus
Go
- Goggia
- Gomesophis
- Gonatodes
- Gongylomorphus
- Gongylosoma
- Gonionotophis
Goniurosaurus Barbour, 1908
- Goniurosaurus araneus Grismer, Viets & Boyle, 1999
- Goniurosaurus bawanglingensis Grismer, Haitao, Orlov & Anajeva, 2002
- Goniurosaurus catbaensis Ziegler, Truong, Schmitz, Stenke, Rösler, 2008
- Goniurosaurus hainanensis Barbour, 1908
- Goniurosaurus huuliensis Orlov, Ryabov, Nguyen, Nguyen & Ho, 2008
- Goniurosaurus kadoorieorum Yang & Chan, 2015
- Goniurosaurus kuroiwae (Namiye, 1912)
- Goniurosaurus kwangsiensis Yang & Chan, 2015
- Goniurosaurus liboensis Wang, Yang & Grismer, 2013
- Goniurosaurus lichtenfelderi (Mocquard, 1897)
- Goniurosaurus luii Grismer, Viets & Boyle, 1999
- Goniurosaurus orientalis (Maki, 1931)
- Goniurosaurus splendens (Nakamura & Uano, 1959)
- Goniurosaurus toyamai Grismer, Ota & Tanaka, 1994
- Goniurosaurus yamashinae (Okada, 1936)
- Goniurosaurus yingdeensis Wang, Yang & Cui, 2010
- Goniurosaurus zhelongi Wang, Jin, Li & Grismer, 2014
Reptilia → Squamata → Eublepharidae
- Gonocephalus
- Gonyophis
- Gonyosoma
- Gopherus
Gr
- Graciliscincus
- Graptemys
- Grayia
- Grypotyphlops
Gu
†Gueragama Simões et al. 2015
- †Gueragama sulamericana Simões et al. 2015[1]
Animalia → Chordata → Reptilia → Squamata → Acrodonta
Gy
- Gyalopion
- Gymnodactylus
- Gymnophthalmidae
- Gymnophthalmus