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 Anagalida Szalay & McKenna, 1971 see Order Anagalida Szalay & McKenna, 1971
                           Mirorder Simplicidentata Weber, 1904
                             Order Rodentia Bowdich, 1821 - rodents
                               Suborder Hystricognatha Woods, 1976 see Suborder Hystricomorpha Brandt, 1855
                                 Infraorder Hystricognathi Tullberg, 1899
                                   Parvorder Caviida Bryant & McKenna, 1995 see Parvorder Caviomorpha Wood & Patterson, 1955
                                     Superfamily Cavioidea Fischer de Waldheim, 1817
                                       Family Dinomyidae Peters, 1873 - pacarana
                                         Subfamily †Eumegamyinae Kraglievich, 1926
                                           01 Genus †Doellomys Alvarez, 1947
                                           02 Genus †Gyriabrus Ameghino, 1891
                                           03 Genus †Briaromys Ameghino, 1889
                                           04 Genus †Tetrastylus Ameghino, 1886
                                           05 Genus †Phoberomys Kraglievich, 1926
                                           06 Genus †Colpostemma Ameghino, 1891
                                           07 Genus †Orthomys Ameghino, 1881
                                           08 Genus †Eumegamys Kraglievich, 1926
                                           09 Genus †Pseudosigmomys Kraglievich, 1931
                                           10 Genus †Pentastylodon Alvarez, 1947
                                           11 Genus †Eumegamysops Alvarez, 1947
                                           12 Genus †Telicomys Kraglievich, 1926
                                           13 Genus †Perumys Kretzoi & Voros, 1989
                                           14 Genus †Artigasia Francis & Mones, 1966