Root
Seymouriamorphs
Diadectomorphs
Millerettids
Synapsids
Captorhinids
Protorothyridids
Diapsids
Mesosaurs
Eunotosaurus
Nyctiphruretus
Nycteroleterids
Bolosaurs
Procolophonids
Owenetta
Barasaurus
Lanthanosuchids
Sclerosaurus
Pareiasaurs
Turtles