Classification of the family Sphenodontidae

Fm. Sphenodontidae Cope 1871
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G. †Ankylosphenodon Reynoso 2000
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Subfm. †Brachyrhinodontinae Huene 1948
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Invalid names: Palacrodontinae Haughton 1924 [synonym]
G. †Cynosphenodon Reynoso 1996
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G. †Derasmosaurus Barbera and Macuglia 1988
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†Derasmosaurus pietrarojae Barbera and Macuglia 1988
G. †Elachistosuchus Janensch 1949
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†Elachistosuchus huenei Janensch 1949
G. †Glevosaurus Swinton 1939
G. †Leptosaurus Fitzinger 1837
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†Leptosaurus neptunius Goldfuss 1831
†Leptosaurus pulchellus Zittel 1887
G. †Oenosaurus Rauhut et al. 2012
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†Oenosaurus muehlheimensis Rauhut et al. 2012
Unr. †Opisthodontia Apesteguía and Novas 2003
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G. †Alamitosphenos Agnolín et al. 2023
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†Alamitosphenos mineri Agnolín et al. 2023
Subfm. †Eilenodontinae Rasmussen and Callison 1981
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G. †Eilenodon Rasmussen and Callison 1981
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†Eilenodon robustus Rasmussen and Callison 1981
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. †Patagosphenos Gentil et al. 2019
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†Patagosphenos wataku Gentil et al. 2019
G. †Toxolophosaurus Olson 1960
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†Toxolophosaurus cloudi Olson 1960
G. †Fraserosphenodon Herrera-Flores et al. 2018
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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. †Sphenotitan Martinez et al. 2013
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†Sphenotitan leyesi Martinez et al. 2013
G. †Trullidens Kligman et al. 2021
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†Trullidens purgatorii Kligman et al. 2021
G. †Paleollanosaurus Heckert 2004
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†Paleollanosaurus fraseri Heckert 2004
G. †Piocormus Wagner 1852
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†Piocormus laticeps Wagner 1852
G. †Scharschengia Huene 1940
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G. †Sigmala Fraser 1986
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†Sigmala sigmala Fraser 1986
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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G. †Navajosphenodon Simões et al. 2022
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†Navajosphenodon sani Simões et al. 2022
G. †Sphenofontis Villa et al. 2021
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†Sphenofontis velserae Villa et al. 2021
G. †Tika Apesteguía et al. 2021
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†Tika giacchinoi Apesteguía et al. 2021
G. †Sphenovipera Reynoso 2005
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†Sphenovipera jimmysjoyi Reynoso 2005
G. †Theretairus Simpson 1926
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†Theretairus antiquus Simpson 1926
G. †Zapatadon Reynoso and Clark 1998
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†Zapatadon ejidoensis Reynoso and Clark 1998
Invalid names: Hatteriidae Cope 1864 [synonym]