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| Synapsida | Caseasauria | Eothyrididae †Vaughnictis |
| Synapsida | Caseasauria | Eothyrididae †Oedaleops |
| Synapsida | Caseasauria | Eothyrididae †Eothyris |
| Synapsida | Caseasauria | Caseidae †Eocasea |
| Synapsida | Caseasauria | Caseidae †Martensius |
| Synapsida | Caseasauria | Caseidae †Casea |
| Synapsida | Caseasauria | Caseidae †Oromycter |
| Synapsida | Caseasauria | Caseidae †Trichasaurus |
| Synapsida | Caseasauria | Caseidae †Euromycter |
| Synapsida | Caseasauria | Caseidae †Ennantosaurus |
| Synapsida | Caseasauria | Caseidae †Angelosaurus |
| Synapsida | Caseasauria | Caseidae †Alierasaurus |
| Synapsida | Caseasauria | Caseidae †Cotylorhynchus |
| Synapsida | Eupelycosauria | Varanopidae †Archaeovenator |
| Synapsida | Eupelycosauria | Varanopidae †Pyozia |
| Synapsida | Eupelycosauria | Varanopidae †Mycterosaurus |
| Synapsida | Eupelycosauria | Varanopidae †Elliotsmithia |
| Synapsida | Eupelycosauria | Varanopidae †Heleosaurus |
| Synapsida | Eupelycosauria | Varanopidae †Mesenosaurus |
| Synapsida | Eupelycosauria | Varanopidae †Varanops |
| Synapsida | Eupelycosauria | Varanopidae †Watongia |
| Synapsida | Eupelycosauria | Varanopidae †Varanodon |
| Synapsida | Eupelycosauria | Varanopidae †Ruthiromia |
| Synapsida | Eupelycosauria | Varanopidae †Aerosaurus |
| Synapsida | Eupelycosauria | Metopophora | Ophiacodontidae †Archaeothyris |
| Synapsida | Eupelycosauria | Metopophora | Ophiacodontidae †Varanosaurus |
| Synapsida | Eupelycosauria | Metopophora | Ophiacodontidae †Ophiacodon |
| Synapsida | Eupelycosauria | Metopophora | Ophiacodontidae †Stereophallodon |
| Synapsida | Eupelycosauria | Metopophora | Haptodontiformes †Ianthodon |
| Synapsida | Eupelycosauria | Metopophora | Haptodontiformes †Milosaurus |
| Synapsida | Eupelycosauria | Metopophora | Haptodontiformes †Kenomagnathus |
| Synapsida | Eupelycosauria | Metopophora | Edaphosauridae †Ianthasaurus |
| Synapsida | Eupelycosauria | Metopophora | Edaphosauridae †Glaucosaurus |
| Synapsida | Eupelycosauria | Metopophora | Edaphosauridae †Luperosaurus |
| Synapsida | Eupelycosauria | Metopophora | Edaphosauridae †Edaphosaurus |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia †Haptodus |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia †Pantelosaurus |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia | Sphenacodontidae †Cutleria |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia | Sphenacodontidae †Secodontosaurus |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia | Sphenacodontidae †Cryptovenator |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia | Sphenacodontidae †Dimetrodon |
| Synapsida | Eupelycosauria | Metopophora | Sphenacodontia | Sphenacodontidae †Sphenacodon |
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