Sphenodontidae Cope, 1870

Brachyrhinodon von Huene, 1910

Chometokadmon Costa, 1864

Cynosphenodon Reynoso, 1996

Diphydontosaurus Whiteside, 1986

Eilenosaurus

Glevosaurus

Hatteria Gray, 1842

Homeosaurus Meyer, 1847

Homoeosaurus Meyer, 1845

Kallimodon Cocude-Michel, 1963

Leptosaurus Fitzinger, 1843

Meyasaurus

Opisthias Gilmore, 1909

Palacrodon Broom, 1906

Paleollanosaurus Heckert, 2004

Pelecymala Fraser, 1986

Planocephalosaurus Fraser, 1982

Polysphenodon

Rhynchocephalus Owen, 1845

Sapheosaurus Meyer, 1850

Scharschengia

Sigmala Fraser, 1986

Simila

Sphaenodon Gray, 1831

Sphenodon Boulenger, 1889

Theretairus Simpson, 1926