Reptile Evolution
 
Tetrapoda
Ichthyostega
Reptilomorpha
Proterogyrinus
Silvanerpeton
Gephyrostegus
 
Reptilia
Lepidosauromorpha
Cephalerpeton node
Captorhinidae
Milleretta node
Casea/Diadectes node
Turtle/Pareiasaur node
Lanthanosuchia
Owenettidae
Lepidosauriformes
Lepidosauria
Fenestrasauria
Pterosauria
Scleroglossa
 
Archosauromorpha
Casineria
Protosynapsida
Synapsida
Protodiapsida
Diapsida
Enaliosauria
Protorosauria
Archosauriformes
Euarchosauriformes
Dinosauromorpha
 
The Origin of Reptiles

The Origin of Reptiles The two clades of Reptiles, Lepidosauromorpha (in gray on the left) and the Archosauromorpha (in white on the right) descend from a tiny species of Gephyrostegus watsoni and other pre-reptiles. Diadectomorphs and microsaurs both now nest within the Reptilia.

 
Lepidosauromorpha
Thuringothyris
Cephalerpeton clade
Cephalerpeton
Reiszorhinus
Concordia
Romeria primus
Captorhinidae
Romeria texana
Protocaptorhinus
Paracaptorhinus
Eocaptorhinus
Captorhinus
Labidosaurus
Milleretta node
Saurorictus
Milleretta RC14
Milleretta RC70
Casea/Diadectes clade
Limnoscelis
Orobates
Eothyris
Acleistorhinus
Turtle/Pareiasaur clade
Bolosaurus
Belebey
Stephanospondylus
 

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