Seymouriadae
Diadectomorpha
Caseidae
Ophiacodontidae
Edaphosauridae
Sphenacodontidae
Gorganopsia
Cynodontia
Captorhinidae
Paleothyris
Araeoscelidia
Claudiosaurus
Younginiformes
Kuehneosauridae
Rhynchocephalia
Squamata
Eosauropterygia
Sinosaurosphargis
Placodus
Cyamodus
Choristodera
Prolacertiformes
Archosauriformes
Rhynchosauria
Trilophosaurus
Millerettidae
Macroleter
Acleistorhinus
Lanthanosuchidae
Bradysaurus
Scutosaurus
Anthodon
Eunotosaurus
Odontochelys
Proganochelys
Testudines
Procolophon
Owenetta