Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Goodrich, 1930 Amniota Haeckel, 1866 - amniotes Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903 1 Order †Pelycosauria Cope, 1878 - pelycosaurs 2 Order †Therapsida Broom, 1905 see [unranked] Therapsida Broom, 1905