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 †Typotheria Zittel, 1892
                                 Family †Interatheriidae Ameghino, 1887
                                   Subfamily †Interatheriinae Ameghino, 1887
                                     01 Genus †Archaeophylus Ameghino, 1897
                                     02 Genus †Cochilius Ameghino, 1902
                                     03 Genus †Medistylus Stirton, 1952
                                     04 Genus †Plagiarthrus Ameghino, 1896
                                     05 Genus †Paracochilius Bordas, 1939
                                     06 Genus †Protypotherium Ameghino, 1882
                                     07 Genus †Epipatriarchus Ameghino, 1903
                                     08 Genus †Miocochilius Stirton, 1953
                                     09 Genus †Caenophilus Ameghino, 1903
                                     10 Genus †Interatherium Moreno, 1882