Family Sphenodontidae Cope 1869 (rhynchocephalian)
PaleoDB taxon number: 37812
Synonym: Hatteriidae Cope 1864 (taxon 359873)
Parent taxon: Neosphenodontia according to J. A. Herrera-Flores et al. 2018
Sister taxa: Homoeosauridae, Opisthodontia, Pamizinsaurus, Pleurosauridae, Sapheosauridae
Subtaxa: Ankylosphenodon, Brachyrhinodontinae, Cynosphenodon, Derasmosaurus, Eilenosaurus, Elachistosuchus, Glevosaurus, Oenosaurus, Paleollanosaurus, Piocormus, Scharschengia, Sigmala, Simila, Sphenodon, Sphenodontinae, Sphenovipera, Theretairus, Zapatadon
Type: Sphenodon
Ecology: