| Rhynchocephalia | Gephyrosauridae †Deltadectes |
| Rhynchocephalia | Gephyrosauridae †Gephyrosaurus |
| Rhynchocephalia | Gephyrosauridae †Penegephyrosaurus |
| Rhynchocephalia | Sphenodontia †Diphydontosaurus |
| Rhynchocephalia | Sphenodontia †Micromenodon |
| Rhynchocephalia | Sphenodontia †Pelecymala |
| Rhynchocephalia | Sphenodontia †Rebbanasaurus |
| Rhynchocephalia | Sphenodontia †Sphenocondor |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia †Godavarisaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia †Planocephalosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia †Theretairus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Opisthiamimus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Brachyrhinodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Clevosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Colobops |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Lanceirosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia †Polysphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia †Lamarquesaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia †Pamizinsaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia †Tingitana |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia †Whitakersaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia †Fraserosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia †Opisthias |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia †Trullidens |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia | Eilenodontinae †Eilenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia | Eilenodontinae †Kaikaifilusaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia | Eilenodontinae †Patagosphenos |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia | Eilenodontinae †Priosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Opisthodontia | Eilenodontinae †Toxolophosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae †Pamizinsaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae †Zapatadon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Sphenovipera |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Cynosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Tika |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Sphenofontis |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Navajosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Kawasphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae †Derasmosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Sphenodontidae | Sphenodontinae Sphenodon punctatus tuatara |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia †Vadasaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia †Ankylosphenodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia †Homoeosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia †Sigmala |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Sapheosauridae †Kallimodon |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Sapheosauridae †Leptosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Sapheosauridae †Oenosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Sapheosauridae †Piocormus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Sapheosauridae †Sapheosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Pleurosauridae †Palaeopleurosaurus |
| Rhynchocephalia | Sphenodontia | Acrosphenodontia | Eusphenodontia | Neosphenodontia | Leptorhynchia | Pleurosauridae †Pleurosaurus |