Seymouriidae

Synapsida

Parareptilia

Captorhinidae

Araeoscelidia

Tangasaurus

Thadeosaurus

Hovasaurus

Lanthanolania

Galesphyrus

Youngina

Kenyasaurus

Acerosodontosaurus

Claudiosaurus

Saurosternon

Palaeagama

Coelurosauravus

Hupehsuchus

Ichthyopterygia

Askeptosaurus

Thalattosaurus

Clarazia

Macrocnemus

Tanystropheus

Prolacerta

Archosauriformes

Rhynchosauria

Trilophosaurus

Choristodera

Testudines

Kuehneosauridae

Squamata

Rhynchocephalia

Helveticosaurus

Placodus

Pachypleurosaurs

Pistosauridae

Simosaurus