Vertebrata
Fish
 
Tetrapoda
Basal Tetrapoda
Temnospondyli
Lepospondyli
Microsauria
Reptilomorpha
 
Reptilia/Amniota
Silvanerpeton
 
Lepidosauromorpha
Urumqia clade
Cephalerpeton clade
Captorhinidae
Milleretta Limnoscelis clade
Bolosaurus Diadectes clade
Turtle Pareiasaur clade
Lanthanosuchia
Owenettidae
Lepidosauriformes
Lepidosauria
Tritosauria
Fenestrasauria • Pterosauria
Protosquamata
Squamata
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
Mammalia
Protodiapsida
Diapsida
Youngininformes
Enaliosauria
Protorosauria
Archosauriformes
Archosauria
Dinosauria
 
Sphenodon palate compared to Teyumbaita palate
 
Sphenodon hand muscles

Extensor muscles and tendons in Sphenodon. Click to enlarge. These have relevance in the search for the homolog of the pteroid found in Cosesaurus and pterosaurs.

 
Rhynchocephalia
Megachirella
Pleurosaursus
Marmoretta
Gephyrosaurus
Ankylosphenodon
Palaeopleurosaurus
Planocephalosaurus
Sphenodon
Brachyrhinodon
Clevosaurus
Sapheosaurus
Noteosuchus
 
Trilophosauria
Teraterpeton
Azendohsaurus
Trilophosaurus
 
Rhynchosauria
Mesosuchus
Priosphenodon
Rhynchosaurus
Hyperodapedon

 

 

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