Ancestor

Captorhinidae

Araeoscelidia

Claudiosaurus

Archosauriformes

Choristodera

Trilophosaurus

Prolacertiformes

Rhynchosauria

Younginiformes

Kuehneosauridae

Squamata

Rhynchocephalia

Odontochelys

Proganochelys

Chelydra

Atopodentatus

Ichthyopterygia

Eusaurosphargis_BES_SC_390

Thalattosauria

Helveticosaurus

Serpiano_dash_Neustico

Anaro_dash_Dactylo

Paraplacodus

Cyamodus

Placodus

Sinosaurosphargis

Saurosphargis

Largocephalosaurus_polycarpon

Largocephalosaurus_qianensis

Yunguisaurus

Plesiosaurus

Augustasaurus

Pistosaurus

Cymatosaurus

Corosaurus

Simosaurus

Germanosaurus

Lariosaurus

Nothosaurus