Youngina
Prolacerta
Squamata
Gephyrosaurus
Diphydontosaurus
Planocephalosaurus
Palaeopleurosaurus
Clevosaurus
Brachyrhinodon
Polysphenodon
Sapheosaurus
Kallimodon
Homoeosaurus
Zapatadon
Pamizinsaurus
Sphenodon
Cynosphenodon
Toxolophosaurus
Eilenodon
Ankylosphenodon