Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes
           Class Mammalia Linnaeus, 1758 - mammals
             Subclass Theria Parker & Haswell, 1897
               Infraclass †Trituberculata
                 1 Order †Symmetrodonta Simpson, 1925 see Infraclass Symmetrodonta Simpson, 1925
                 2 Genus †Shuotherium Chow & Rich, 1982
                 3 Order †Eupantotheria Kermack & Mussett, 1958