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
               Theria of Metatherian-Eutherian grade
                 Infraclass Eutheria Gill, 1872
                   Order †Condylarthra Cope, 1881
                     01 Family †Arctocyonidae Giebel, 1855
                     02 Family †Paroxyclaenidae Weitzel, 1933
                     03 Family †Tricuspiodontidae Simpson, 1929 see Subfamily Tricuspiodontinae Simpson, 1929
                     04 Family †Mioclaenidae Osborn & Earle, 1895
                     05 Family †Hyopsodontidae Trouessart, 1879
                     06 Family †Meniscotheriidae Cope, 1882 see Subfamily Meniscotheriinae Cope, 1882
                     07 Family †Periptychidae Cope, 1882
                     08 Family †Phenacodontidae Cope, 1881
                     09 Family †Didolodontidae Scott, 1913
                     10 Family †Phenacolophidae South China Red Bed Team, 1977