Classification of the subclass Lepidosauria
Superor. Lepidosauria Haeckel 1866 [lepidosaur]
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G. †Euposaurus Jourdan 1862
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†Euposaurus thiolleri Lortet 1892
†Euposaurus thiollierei Lortet 1892
Invalid names: Euposaurus cerinensis Lortet 1892 [nomen dubium], Euposaurus lorteti Lortet 1892 [nomen dubium]
Or. †Millerosauria Watson 1957
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Invalid names: Broomiidae Nopcsa 1923 [empty], Mesenosauridae [empty]
Or. †Prolacertilia Huene 1954
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Subor. †Prolacertoidea Camp 1923
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Invalid names: Macrocnemoidea Kuhn 1946 [synonym], Priceidae Kuhn 1961 [empty]
Invalid names: Trachelosauria Broili 1917 [empty]
Or. Rhynchocephalia Günther 1867 [rhynchocephalian]
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Fm. †Gephyrosauridae Evans 1980
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G. †Gephyrosaurus Evans 1980
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†Gephyrosaurus bridensis Evans 1980
†Gephyrosaurus evansae Whiteside and Duffin 2017
G. †Hamatopus Lilienstern 1939
Invalid names: Pachystropheidae Kuhn 1961 [empty], Sauranodontes Lortet 1892 [empty], Sphenodontiformes Hay 1930 [empty], Tholodontidae Kuhn [empty]
G. †Sauroeidepus Ellenberger 1970
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†Sauroeidepus matsepensis Ellenberger 1970
†Sauroeidepus quthingensis Ellenberger 1970
Unr. Sphenodontia Jaekel 1910
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Infraor. †Eusphenodontia Herrera-Flores et al. 2018
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Fm. †Clevosauridae Fraser 1993
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G. †Clevosaurus Swinton 1939
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†Clevosaurus bairdi Sues et al. 1994
†Clevosaurus brasiliensis Bonaparte and Sues 2006
†Clevosaurus cambrica Keeble et al. 2018
†Clevosaurus convallis Saila 2005
†Clevosaurus hadroprodon Hsiou et al. 2019
†Clevosaurus hudsoni Swinton 1939
†Clevosaurus minor Fraser 1988
†Clevosaurus sectumsemper Klein et al. 2015
Invalid names: Clevosaurus mcgilli Wu 1994 [nomen dubium], Clevosaurus wangi Wu 1994 [nomen dubium], Dianosaurus Young 1982 [synonym], Dianosaurus petilus Young 1982 [nomen dubium]
G. †Microsphenodon Chambi-Trowell et al. 2021
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†Microsphenodon bonapartei Chambi-Trowell et al. 2021
Unr. †Neosphenodontia Herrera-Flores et al. 2018
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Fm. †Pleurosauridae Lydekker 1888
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G. †Acrosaurus Meyer 1854
G. †Palaeopleurosaurus Carroll 1985
G. †Pleurosaurus Meyer
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Invalid names: Anguisaurus Münster 1839 [synonym], Saurophidium Jourdan 1862 [synonym]
Invalid names: Acrosauridae Meyer 1861 [synonym]
Fm. †Saphaeosauridae Nopcsa 1923
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G. †Kallimodon Cocude-Michel 1963
Invalid names: Sauranodontidae Lortet 1892 [synonym]
G. †Lamarquesaurus Apesteguía and Rougier 2007
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†Lamarquesaurus cabazai Apesteguía and Rougier 2007
G. †Planocephalosaurus Fraser 1982
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†Planocephalosaurus lucasi Heckert 2004
†Planocephalosaurus robinsonae Fraser 1982
G. †Tingitana Evans and Sigogneau-Russell 1997
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†Tingitana anoualae Evans and Sigogneau-Russell 1997
Invalid names: Homoeosauria Jaekel 1910 [synonym], Sauranodonti Marsh 1879 [empty], Sphenodonta [synonym]
Fm. Sphenodontidae Cope 1871
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G. †Eilenosaurus
G. †Glevosaurus Swinton 1939
G. †Leptosaurus Fitzinger 1837
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†Leptosaurus neptunius Goldfuss 1831
†Leptosaurus pulchellus Zittel 1887
Unr. †Opisthodontia Apesteguía and Novas 2003
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Subfm. †Eilenodontinae Rasmussen and Callison 1981
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G. †Kaikaifilusaurus Simon and Kellner 2003
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†Kaikaifilusaurus calvoi Simon and Kellner 2003
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Invalid names: Priosphenodon avelasi Apesteguía and Novas 2003 [synonym]
†Kaikaifilusaurus minimus Apesteguia and Carballido 2014
G. †Kawasphenodon Apesteguía 2005
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†Kawasphenodon expectatus Apesteguía 2005
†Kawasphenodon peligrensis Apesteguía et al. 2014
G. †Priosphenodon Apesteguía and Novas 2003
G. †Simila
G. Sphenodon Gray 1831
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Sphenodon guentheri Gunther 1867 [Brother island tuatara]
Sphenodon punctata Gray 1842 [tuatara]
Subfm. Sphenodontinae Cope 1871
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Invalid names: Hatteriidae Cope 1864 [synonym]
Invalid names: Patricosaurus Seeley 1887 [nomen dubium], Weigeltisauria Kuhn 1939 [empty]