Seymouriadae

Diadectomorpha

Caseidae

Ophiacodontidae

Edaphosauridae

Sphenacodontidae

Cynodontia

Gorganopsia

Millerettidae

Macroleter

Lanthanosuchidae

Acleistorhinus

Owenetta

Procolophon

Bradysaurus

Anthodon

Scutosaurus

Eunotosaurus

Odontochelys

Testudines

Proganochelys

Captorhinidae

Paleothyris

Araeoscelidia

Claudiosaurus

Younginiformes

Choristodera

Prolacertiformes

Archosauriformes

Trilophosaurus

Rhynchosauria

Kuehneosauridae

Squamata

Rhynchocephalia

Eosauropterygia

Sinosaurosphargis

Cyamodus

Placodus