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