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