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 Sciurida Brandt, 1855
                                   Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
                                     Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
                                       01 Genus †Similisciurus Stevens, 1977
                                       02 Genus †Sinotamias Qiu, 1991
                                       03 Genus Sciurotamias Miller, 1901 - rock squirrels
                                       04 Tribe Sciurini Batsch, 1788
                                       05 Tribe Xerini Murray, 1866
                                       06 Tribe Marmotini Pocock, 1923
                                       07 Tribe Tamiini Weber, 1928
                                       08 Tribe Ratufini Moore, 1959
                                       09 Tribe Nannosciurini Forsyth Major, 1893
                                       10 Tribe Protoxerini Moore, 1959
                                       11 Tribe Funambulini Pocock, 1923
                                       12 Tribe Tamiasciurini Pocock, 1923