Classification of Rauhut et al. 2012

Subfm. Sphenodontinae Cope 1871
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G. †Cynosphenodon Reynoso 1996
G. †Oenosaurus Rauhut et al. 2012
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Oenosaurus muehlheimensis Rauhut et al. 2012
G. Sphenodon Gray 1831
G. †Zapatadon Reynoso and Clark 1998
Or. Rhynchocephalia G√ľnther 1867 [rhynchocephalian]
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G. †Brachyrhinodon Huene 1910
G. †Clevosaurus Swinton 1939
G. †Diphydontosaurus Whiteside 1986
G. †Eilenodon Rasmussen and Callison 1981
G. †Gephyrosaurus Evans 1980
G. †Homoeosaurus Meyer 1850
G. †Kallimodon Cocude-Michel 1963
G. †Opisthias Gilmore 1909
G. †Palaeopleurosaurus Carroll 1985
G. †Planocephalosaurus Fraser 1982
G. †Priosphenodon Apestegu√≠a and Novas 2003
G. †Sapheosaurus von Meyer 1850
G. †Toxolophosaurus Olson 1960
Sphenodontia Jaekel 1910
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Fm. †Pleurosauridae Lydekker 1888
Invalid names: Sphenodonta [synonym]
Subfm. †Pleurosauridae Lydekker 1888
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G. †Pleurosaurus Meyer