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 †Litopterna Ameghino, 1889
                               Superfamily †Proterotherioidea Ameghino, 1887
                                 Family †Proterotheriidae Ameghino, 1887
                                   Subfamily †Proterotheriinae Ameghino, 1887
                                     01 Genus †Deuterotherium Ameghino, 1895
                                     02 Genus †Megadolodus McKenna, 1956
                                     03 Genus †Eoproterotherium Ameghino, 1904
                                     04 Genus †Prolicaphrium Ameghino, 1902
                                     05 Genus †Prothoatherium Ameghino, 1902
                                     06 Genus †Licaphrium Ameghino, 1887
                                     07 Genus †Diadiaphorus Ameghino, 1887
                                     08 Genus †Thoatherium Ameghino, 1887
                                     09 Genus †Brachytherium Ameghino, 1883
                                     10 Genus †Epecuenia Cabrera, 1939
                                     11 Genus †Diplasiotherium Rovereto, 1914
                                     12 Genus †Proterotherium Ameghino, 1883