Seymouriidae

Synapsida

Parareptilia

Captorhinidae

Araeoscelidia

Orovenator

Lanthanolania

Tangasaurus

Hovasaurus

Acerosodontosaurus

Thadeosaurus

Youngina

Claudiosaurus

Kuehneosauridae

Choristodera

Squamata

Rhynchocephalia

Coelurosauravus

Tanystropheus

Macrocnemus

Prolacerta

Trilophosaurus

Archosauriformes

Rhynchosauria

Askeptosaurus

Thalattosaurus

Clarazia

Ichthyopterygia

Hupehsuchus

Helveticosaurus

Placodus

Pachypleurosaurs

Pistosauridae

Simosaurus