vertebrates Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Cohort Amniota Haeckel, 1866 see Clade Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988], nom. cl. inval.
     Class "Reptilia" Linnaeus, 1758 - reptiles
       Subclass †Theropsida Seeley, 1896
         Order †Pelycosauria Cope, 1878 - pelycosaurs
           1 Suborder †Sphenacodontia Marsh, 1878
           2 Suborder †Edaphosauria Cope, 1882