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 Sciuromorpha Brandt, 1855
                                 Infraorder Castorimorpha Wood, 1955 see Infraorder Castorimorphi
                                   Family Castoridae Batsch, 1788 - beavers
                                     Subfamily †Castoroidinae Allen, 1877
                                       01 Genus †Steneofiber Geoffroy Saint-Hilaire, 1833
                                       02 Genus †Neatocastor Korth, 1996
                                       03 Genus †Asiacastor Lytchev & Aubekerova, 1971
                                       04 Genus †Youngofiber Chow & Li, 1978
                                       05 Genus †Trogontherium Fischer de Waldheim, 1809
                                       06 Genus †Eucastor Leidy, 1858
                                       07 Genus †Schreuderia Aldana Carras, 1992
                                       08 Genus †Dipoides Jaeger, 1835
                                       09 Genus †Boreofiber Radulesco & Samson, 1972
                                       10 Genus †Romanocastor Radulesco & Samson, 1967
                                       11 Genus †Zamolxifiber Radulesco & Samson, 1967
                                       12 Genus †Procastoroides Barbour & Schultz, 1937
                                       13 Genus †Castoroides Foster, 1838
                                       14 Genus †Paradipoides Rinker & Hibbard, 1952