Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Teleostomi Bonaparte, 1836
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. - amniotes see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
           Class Mammalia Linnaeus, 1758 - mammals
             Subclass Theria Parker & Haswell, 1897
               Theria of Metatherian-Eutherian grade
                 Infraclass Eutheria Gill, 1872
                   Order Perissodactyla Owen, 1848 - odd-toed ungulates
                     Suborder Ceratomorpha Wood, 1937
                       Superfamily Tapiroidea Gray, 1825
                         1 Family †Isectolophidae Peterson, 1919
                         2 Family †Helaletidae Osborn, 1892
                         3 Family †Lophialetidae Matthew & Granger, 1925
                         4 Family †Deperetellidae Radinsky, 1965
                         5 Family †Lophiodontidae Gill, 1872
                         6 Family Tapiridae Gray, 1821 - tapirs