Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Tetrapoda Goodrich, 1930
         Amniota Haeckel, 1866 - 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