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