Class Reptilia Linnaeus, 1758 - reptiles
Count: [*†*] 4o;47f; †14o;194f [5 Jan 2017]
   Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903
  Count: [†*] †3o;39f [5 Jan 2017]
     Order †Therapsida Broom, 1905 see [unranked] Therapsida Broom, 1905
    Count: [†*] †30f [5 Jan 2017]
       Suborder †Theriodontia Owen, 1876 [paraphyletic]
      Count: [†*] †20f [5 Jan 2017]
         Family †gorgonopsidae Lydekker, 1890
        Count: -