Seymouriidae
Diadectomorpha
Caseidae
Ophiacodontidae
Edaphosauridae
Sphenacodontidae
Gorgonopsia
Cynodontia
Captorhinidae
Palaeothyris
Millerettidae
Macroleter
Procolophon
Owenetta
Araeoscelidae
Claudiosaurus
Younginiformes
Kuehneosauridae
Testudines
Choristodera
Rhynchosauria
Prolacertiformes
Trilophosaurus
Archosauromorpha
Acleistorhinus
Lanthanosuchidae
Bradysaurus
Scutosaurus
Anthodon
Rhynchocephalia
Squamata
Eosauropterygia
Placodus
Cyamodus
Mesosauria
Ichthyosauria