Reptile Evolution
 
Tetrapoda
Ichthyostega
Reptilomorpha
Lepospondyli
 
Reptilia/Amniota
Gephyrostegus
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
Mammalia
Protodiapsida
Diapsida
Terrestrial Youngininformes
Marine Youngininformes
Enaliosauria
Protorosauria
Archosauriformes
Archosauria
Dinosauria
 
Lepidosauromorpha
Urumqia clade
Cephalerpeton clade
Captorhinidae
Milleretta clade
Casea Diadectes clade
Turtle Pareiasaur clade
Lanthanosuchia
Owenettidae
Lepidosauriformes
Lepidosauria
Tritosauria
Fenestrasauria
Pterosauria
Squamata
 
Dinocephalia

Antepsaurian skulls. Starting with Syodon, these bulky herbivores tended to shorten the tail and thicken the skull. Various groups produce different sorts of thickened skulls, Anteosaurus among them.

 
 
Synapsida
Pelycosauria
 
Therapsida
Cutleria
Anomodontia
Stenocybus
Galechirus • Dromasauria
Venjukovia • Otsheria
Tiarajudens
Suminia
Dicynodon
 
Kynodontia
Hipposaurus
Lermurosaurus - Burnetia
Biarmosuchus
Theriodontia
Eotitanosuchus
Gorgonopsia
Therocephalia
Cynodontia
Procynosuchus
Thrinaxodon
Chiniquodon - Castrocauda
Pachygenelus - Oligokyphus
Repenomamus
 
Anteosauria
Phthinosuchus
Syodon
Titanophoneus
Anteosaurus
Tapinocephalia
Biseridens - Jonkeria
Moschops - Ulemosaurus
 

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