Seymouriidae

Diadectomorpha

Caseidae

Ophiacodontidae

Edaphosauridae

Sphenacodontidae

Cynodontia

Gorgonopsia

Archosauromorpha

Trilophosaurus

Prolacertiformes

Rhynchosauria

Choristodera

Testudines

Kuehneosauridae

Younginiformes

Claudiosaurus

Araeoscelidae

Owenetta

Procolophon

Macroleter

Millerettidae

Palaeothyris

Captorhinidae

Ichthyosauria

Mesosauria

Squamata

Rhynchocephalia

Lanthanosuchidae

Acleistorhinus

Eosauropterygia

Cyamodus

Placodus

Anthodon

Scutosaurus

Bradysaurus