Class Reptilia Linnaeus, 1758 - reptiles Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903 Order †Therapsida Broom, 1905 see [unranked] Therapsida Broom, 1905 Suborder †Theriodontia Owen, 1876 [paraphyletic] Family †Waitsiidae Haughton, 1918 see Family Whaitsiidae Haughton, 1918