Reptile Evolution
 
Tetrapoda
Ichthyostega
Reptilomorpha
Lepospondyli
 
Reptilia/Amniota
Gephyrostegus
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
Protodiapsida
Diapsida
Younginiformes
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
 
 
Protosynapsida
Paleothyris
Coelostegus
Hylonomus
Protorothyris
 
Synapsida
Elliotsmithia - Apsisaurus
Aerosaurus
Varanops
Varanodon
Varanosaurus
Archaeothyris
Ophiacodon
Haptodus
Edaphosaurus
Ianthasaurus
Echinerpeton
Secodontosaurus
Dimetrodon Sphenacodon
 
Therapsida
Stenocybus - Dicynodonts
Biarmosuchus - Therapsida
 

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