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