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
                                 01 Genus †Brandmayria Cabrera, 1935, nom. dub.
                                 02 Genus †Colhuelia Roth, 1902, nom. dub.
                                 03 Genus †Lafkenia Roth, 1902, nom. dub.
                                 04 Genus †Colhuapia Roth, 1902, nom. dub.
                                 05 Genus †Allalmeia Rusconi, 1946
                                 06 Genus †Brachystephanus Simpson, Minoprio & Patterson, 1962
                                 07 Genus †Xenostephanus Simpson, Minoprio & Patterson, 1962
                                 08 Genus †Phanotherus Ameghino, 1889, nom. dub.
                                 09 Genus †Hermoseodon Mercerat, 1917, nom. dub.
                                 10 Family †Isotemnidae Ameghino, 1897
                                 11 Family †Leontiniidae Ameghino, 1895
                                 12 Family †Notohippidae Ameghino, 1894
                                 13 Family †Toxodontidae Owen, 1845
                                 14 Family †Homalodotheriidae Gregory, 1910