Classification of Estes 1983
G. †Goniopholis Owen 1842
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†Goniopholis simus Owen 1879
Invalid names: Goniopholis brodiei Owen 1854 [nomen dubium], Macellodus Owen 1854 [synonym]
Fm. †Polyglyphanodontidae Gilmore 1942
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Invalid names: Adamisauridae Sulimski 1972 [synonym], Macrocephalosauridae Sulimski 1975 [synonym]
Fm. Gerrhonotidae Cope 1864
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G. Gerrhonotus Wiegmann 1828 [alligator lizard]
G. †Paragerrhonotus Estes 1963
†Prodesmodon copei Estes 1964
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Invalid names: Cuttysarkus mcnallyi Estes 1964 [synonym]
Or. Holostei Müller 1846
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Invalid names: Chilingosaurus chingshankouensis Young 1961 [nomen dubium]
Superor. Squamata Oppel 1811 [squamates]
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Or. Amphisbaenia Gray 1844 [worm lizard]
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Fm. Bipedidae Taylor 1951
Fm. Rhineuridae Vanzolini 1951
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G. †Dyticonastis Berman 1976
G. †Jepsibaena Vanzolini 1951
G. †Lestophis Marsh 1885
G. †Macrorhineura Macdonald 1970
G. †Ototriton Loomis 1919
G. †Pseudorhineura Vanzolini 1951
G. Rhineura Cope 1861 [worm lizard]
G. †Spathorhynchus Berman 1973
Fm. Trogonophidae Gray 1865
Or. Sauria MacCartney 1802
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Infraor. †Eolacertilia Robinson 1967
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G. †Lacertulus Carroll and Thompson 1982
Invalid names: Fulengidae Carroll and Galton 1977 [empty], Naocephalus Cope 1872 [nomen dubium], Naocephalus porrectus Cope 1872 [nomen dubium]
Subor. Lacertilia Owen 1842 [lizard]
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Infraor. Anguimorpha Fürbringer 1900
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Superfm. †Anguioidea Fitzinger 1826
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Fm. Anguidae Gray 1825
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Subfm. †Anguinae Gray 1825
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G. Anguis Linnaeus 1758 [slow worm]
G. †Machaerosaurus Gilmore 1928
G. †Ophipseudopus Kuhn 1940
G. †Ophisauriscus Kühn 1940
G. Ophisaurus Daudin 1803 [glass lizard]
Subfm. Anniellinae Nopcsa 1928
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G. Anniella Gray 1852 [legless lizard]
G. †Apodosauriscus Gauthier 1982
Subfm. †Diploglossinae Boucourt 1873
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G. Celestus Gray 1838
G. Diploglossus Wiegmann 1828
G. †Eodiploglossus Gauthier 1982
Subfm. Gerrhonotinae Cope 1864
Subfm. †Glyptosaurinae Marsh 1872
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Tr. †Glyptosaurini Sullivan 1979
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G. †Eoglyptosaurus Sullivan 1979
G. †Glyptosaurus Marsh 1871
G. †Helodermoides Douglass 1903
G. †Paraglyptosaurus Sullivan 1979
G. †Placosaurus Gervais 1852
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†Placosaurus mongoliensis Sullivan 1979
Invalid names: Placosaurus galliae Filhol 1894 [nomen dubium], Placosaurus gaudryi De Stefano 1903 [nomen dubium], Placosaurus margariticeps Gervais 1876 [nomen dubium], Placosaurus waltheri Weigelt 1929 [nomen dubium]
Tr. †Melanosaurini Sullivan 1979
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G. †Arpadosaurus Meszoely 1970
G. †Melanosaurus Gilmore 1928
G. †Odaxosaurus Gilmore 1928
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G. †Peltosaurus Cope 1873
G. †Proxestops Gauthier 1982
G. †Xestops Cope 1873
Invalid names: Diacium quinquepedale Cope 1874 [nomen dubium]
Fm. †Dorsetisauridae Hoffstetter 1967
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G. †Dorsetisaurus Hoffstetter 1967
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†Dorsetisaurus hebetidens Hoffstetter 1967
†Dorsetisaurus purbeckensis Hoffstetter 1967
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Invalid names: Introrsisaurus pollicidens Seiffert 1975 [synonym]
Invalid names: Introrsisaurus Seiffert 1975 [synonym]
Fm. Xenosauridae Cope 1866
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G. †Exostinus Cope 1873
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†Exostinus lancensis Gilmore 1928
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Invalid names: Harpagosaurus parvus Gilmore 1928 [synonym], Prionosaurus regularis Gilmore 1928 [synonym]
Invalid names: Harpagosaurus Gilmore 1928 [synonym], Prionosaurus Gilmore 1928 [synonym]
G. †Restes Gauthier 1982
Superfm. †Varanoidea Gray 1827
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Fm. †Necrosauridae Hoffstetter 1943
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G. †Eosaniwa Haubold 1977
G. †Necrosaurus Filhol 1876
G. †Parasaniwa Gilmore 1928
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G. †Provaranosaurus Gilmore 1942
Fm. Varanidae Hardwicke and Gray 1824 [monitor lizard]
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G. †Iberovaranus Hoffstetter 1969
G. †Megalania Owen 1859
G. †Saniwa Leidy 1870
G. Varanus Merrem 1820
Invalid names: Helodermatidae Gray 1837 [empty]
G. †Anhuisaurus Hou 1974
G. †Changjiangosaurus Hou 1976
G. †Conicodontosaurus Gilmore 1943
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†Conicodontosaurus djadochtaensis Gilmore 1943
†Conicodontosaurus kanhsienensis Young 1973
G. †Dibolosodon Ameghino 1898
G. †Dicarlesia Huene 1932
Infraor. Gekkota Cuvier 1817
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Fm. †Ardeosauridae Camp 1923
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G. †Ardeosaurus von Meyer 1860
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†Ardeosaurus brevipes Meyer 1909
†Ardeosaurus digitatellus Grier 1914
G. †Eichstaettisaurus Kuhn 1958
G. †Yabeinosaurus Endo and Shikama 1942
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†Yabeinosaurus tenuis Endo and Shikama 1942
†Yabeinosaurus youngi Hoffstetter 1964
Fm. Gekkonidae Gray 1825 [gecko]
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G. Aristelliger Cope 1861 [croacking gecko]
G. †Cadurcogekko Hoffstetter 1946
G. Coleonyx Gray 1845 [banded gecko]
G. Cyrtodactylus Gray 1827 [bow-fingered gecko]
G. Geckolepis Grandidier 1867
G. Gekko Laurenti 1768 [gecko]
G. †Gerandogekko Hoffstetter 1946
G. Hemidactylus Cuvier 1817
G. Lygodactylus Gray 1864
G. Paroedura Günther 1879 [Madagascar ground gecko]
G. Phelsuma Gray 1825
G. Phyllodactylus Gray 1828 [leaf-toed gecko]
G. †Rhodanogekko Hoffstetter 1946
G. Sphaerodactylus Wagler 1830 [round-fingered gecko]
G. Tarentola Gray 1825 [wall gecko]
G. Thecadactylus Cuvier 1820 [turnip-tailed gecko]
Invalid names: Bavarisauridae Kuhn 1961 [empty], Pygopodidae Boulenger 1884 [empty]
G. †Haplodontosaurus Gilmore 1942
Infraor. Iguania Cuvier 1817
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Fm. Agamidae Gray 1827
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G. Agama Daudin 1802
G. Clamydosaurus Gray 1825
G. Stellio Laurenti 1768
G. †Tinosaurus Marsh 1872
G. †Tinosaurus Marsh 1872
G. Uromastyx Merrem 1820 [spiny-tailed lizard]
Fm. Iguanidae Oppel 1811
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G. †Aciprion Cope 1873
G. Anolis Daudin 1802 [anole]
G. Basiliscus Laurenti 1768
G. Crotaphytus Holbrook 1843 [collared lizard]
G. Ctenosaura Wiegmann 1828 [spinytail iguana]
G. Cyclura Harlan 1824 [rock iguana]
G. †Cypressaurus Holman 1972
G. Dipsosaurus Hallowell 1854 [dessert iguana]
G. †Erichosaurus Ameghino 1899
G. †Geiseltaliellus Kuhn 1944
G. †Harrisonsaurus Holman 1981
G. Holbrookia Girard 1851 [lesser earless lizard]
G. Iguana Laurenti 1768 [iguana]
G. Laemanctus Wiegmann 1834 [casquehead iguana]
G. Leiocephalus Gray 1827 [curly-tailed lizard]
G. Leiosaurus Duméril and Bibron 1837
G. Oplurus Cuvier 1829
G. †Paradipsosaurus Fries et al. 1955
G. †Parasauromalus Gilmore 1928
G. Phrynosoma Wiegmann 1828 [horned lizard]
G. Sauromalus Duméril 1856 [chuckwalla]
G. Sceloporus Wiegmann 1828 [spiny lizard]
G. †Swainiguanoides Sullivan 1982
G. Urosaurus Hallowell 1854
G. Uta Baird and Girard 1852 [side-blotched lizard]
Invalid names: Euposauridae Camp 1923 [empty]
G. †Lisboasaurus Seiffert 1975
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†Lisboasaurus estesi Seiffert 1975
†Lisboasaurus mitracostatus Seiffert 1975
G. †Qianshanosaurus Hou 1974
G. †Sauromorus Pomel 1953
Infraor. Scincomorpha Camp 1923
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Superfm. Cordyloidea Fitzinger 1826
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Fm. Cordylidae Gray 1837 [spinytail lizard]
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G. Gerrhosaurus Wiegmann 1828
G. †Pseudolacerta De Stefano 1903
Fm. †Paramacellodidae Estes 1983
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G. †Paramacellodus Hoffstetter 1967
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†Paramacellodus oweni Hoffstetter 1967
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Invalid names: Becklesisaurus scincoides Hoffstetter 1967 [synonym], Saurillus robustidens Hoffstetter 1967 [synonym]
Fm. Xantusiidae Baird 1858 [night lizard]
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G. Lepidophyma Duméril 1851 [tropical night lizard]
G. †Palaeoxantusia Hecht 1956
G. Xantusia Baird 1859 [night lizard]
Superfm. Lacertoidea Camp 1923
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Fm. Gymnophthalmidae Merrem 1820
Fm. Lacertidae Bonaparte 1831
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G. †Dracaenosaurus Pomel 1846
G. Eremias Wiegmann 1834
G. Lacerta Linnaeus 1758
G. †Plesiolacerta Hoffstetter 1942
G. †Pseudeumeces Hoffstetter 1944
Fm. Teiidae Gray 1827
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Subfm. †Polyglyphanodontinae Gilmore 1942
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G. †Haptosphenus Estes 1964
G. †Paraglyphanodon Gilmore 1940
Subfm. †Teiinae
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Tr. Teiini Presch 1974
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G. Ameiva Meyer 1795 [whiptail lizard]
G. Cnemidophorus Wagler 1830 [whiptail lizard]
G. Dicrodon Duméril and Bibron 1839
Tr. Tupinambini Presch 1974
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G. Callopistes Gravenhorst 1838
G. †Chamops Marsh 1892
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†Chamops segnis Marsh 1892
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Invalid names: Alethesaurus quadratus Gilmore 1928 [synonym], Iguanavus teres Marsh 1892 [synonym], Lanceosaurus compressus Gilmore 1928 [synonym], Lanceosaurus hatcheri Gilmore 1928 [synonym]
Invalid names: Alethesaurus Gilmore 1928 [synonym], Lanceosaurus Gilmore 1928 [synonym]
G. †Diasemosaurus Ameghino 1898
G. Dracaena Daudin 1802 [caiman lizard]
G. Tupinambis Daudin 1802 [tegu]
Superfm. †Scincoidea Oppel 1811
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Fm. Dibamidae Boulenger 1884
Fm. Scincidae Gray 1825 [skink]
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Subfm. Lygosominae Mittleman 1952
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G. Ablepharus Lichtenstein 1823
G. Egernia Gray 1838
G. †Leiolpisma Dumeril and Bibron 1839
G. Mabuya Fitzinger 1826
G. Trachydosaurus Gray 1825
Subfm. Scincinae Gray 1825
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G. †Chalcides Linnaeus 1758
G. Eumeces Wiegmann 1834
G. Gongylomorphus Fitzinger 1843
G. †Paracontogenys Schatzinger 1975
Invalid names: Feylininae Camp 1923 [empty]
Invalid names: Cremastosaurus Cope 1873 [nomen dubium], Cremastosaurus rhambastes Cope 1884 [nomen dubium], Diacium Cope 1873 [nomen dubium], Iguanavus Marsh 1872 [nomen dubium], Iguanavus exilis Marsh 1872 [nomen dubium]
Or. Anura Fischer von Waldheim 1813 [frog]
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Invalid names: Diacium unipedalis Cope 1873 [nomen dubium]
†Eolacerta robusta Nöth 1940
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Invalid names: Iguanosauriscus haupti Kuhn 1958 [synonym]