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
                               01 Genus †Acoelodus Ameghino, 1897
                               02 Genus †Pleurystylops Ameghino, 1901, nom. dub.
                               03 Genus †Lophiodonticulus Ameghino, 1902, nom. dub.
                               04 Genus †Tonostylops Ameghino, 1902, nom. dub.
                               05 Genus †Isotypotherium Ameghino, 1904, nom. dub.
                               06 Genus †Epitypotherium Ameghino, 1904
                               07 Genus †Carolodarwinia Ameghino, 1901, nom. dub.
                               08 Genus †Ortholophodon Roth, 1902, nom. dub.
                               09 Genus †Procolpodon Ameghino, 1904, nom. dub.
                               10 Genus †Senodon Ameghino, 1895
                               11 Genus †Loxocoelus Ameghino, 1895
                               12 Genus †Pyralophodon Ameghino, 1904
                               13 Genus †Orthogeniops Ameghino, 1902, nom. dub.
                               14 Genus †Pyramidon Roth, 1901, nom. dub.
                               15 Genus †Archaeotypotherium Roth, 1903, nom. dub.
                               16 Suborder †Notioprogonia Simpson, 1934
                               17 Suborder †Toxodontia Owen, 1853
                               18 Suborder †Typotheria Zittel, 1892
                               19 Suborder †Hegetotheria Simpson, 1945