Mammaliaformes Rowe 1988
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                   Cohort Placentalia Owen, 1837 - placentals
                     Magnorder Epitheria McKenna, 1975 see Cohort Placentalia Owen, 1837
                       Superorder Preptotheria McKenna, 1975
                         Grandorder Ungulata Linnaeus, 1766
                           Mirorder †Meridiungulata McKenna, 1975 - South American ungulates see Grandorder Meridiungulata McKenna, 1975
                             Order †Notoungulata Roth, 1903
                               Suborder †Toxodontia Owen, 1853
                                 Family †Toxodontidae Owen, 1845
                                   Subfamily †Toxodontinae Owen, 1845
                                     01 Genus †Minitoxodon Paula Couto, 1982
                                     02 Genus †Stereotoxodon Ameghino, 1904
                                     03 Genus †Stenotephanos Ameghino, 1886
                                     04 Genus †Hyperoxotodon Mercerat, 1895
                                     05 Genus †Nesodonopsis Roth, 1898
                                     06 Genus †Pericotoxodon Madden, 1997
                                     07 Genus †Andinotoxodon Madden, 1991
                                     08 Genus †Eutomodus Ameghino, 1889
                                     09 Genus †Neotoxodon Paula Couto, 1982
                                     10 Genus †Gyrinodon Hopwood, 1928
                                     11 Genus †Mesenodon Paula Couto, 1982
                                     12 Genus †Pisanodon Zetti, 1972
                                     13 Genus †Neoadinotherium Bordas, 1941
                                     14 Genus †Hemixotodon Cabrera & Kraglievich, 1931
                                     15 Genus †Dinotoxodon Mercerat, 1895
                                     16 Genus †Plesiotoxodon Paula Couto, 1982
                                     17 Genus †Chapalmalodon Mercerat, 1917
                                     18 Genus †Toxodon Owen, 1837
                                     19 Genus †Nonotherium Castellanos, 1942
                                     20 Genus †Ceratoxodon Ameghino, 1907