Root

Diapsids

Protorothyridids

Captorhinids

Synapsids

Millerettids

Diadectomorphs

Seymouriamorphs

Mesosaurs

Eunotosaurus

Nycteroleterids

Nyctiphruretus

Bolosaurs

Procolophonids

Barasaurus

Owenetta

Lanthanosuchids

Sclerosaurus

Turtles

Pareiasaurs