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 Pteromyinae Brandt, 1855 - flying squirrels
                                       01 Genus †Oligopetes Heissig, 1979
                                       02 ?Genus †Petauristodon Engesser, 1979
                                       03 Genus †Miopetaurista Kretzoi, 1962
                                       04 Genus †Aliveria de Bruijn, van der Meulen & Katsikatsos, 1980
                                       05 Genus †Shuanggouia Qiu & Liu, 1986
                                       06 Genus †Blackia Mein, 1970
                                       07 Genus †Forsythia Mein, 1970
                                       08 Genus Pteromys Cuvier, 1800 - Old World flying squirrels
                                       09 Genus †Albanensia Daxner-Hock & Mein, 1975
                                       10 Genus †Meinia Qiu, 1981
                                       11 Genus Hylopetes Thomas, 1908 - pygmy flying squirrels
                                       12 Genus Eoglaucomys Howell, 1915
                                       13 Genus Petinomys Thomas, 1908 - dwarf flying squirrels
                                       14 Genus †Pliopetaurista Kretzoi, 1962
                                       15 Genus †Pliosciuropterus Sulimski, 1964
                                       16 Genus †Parapetaurista Qiu & Liu, 1986
                                       17 Genus Petaurista Link, 1795 - giant flying squirrels
                                       18 Genus †Petauria Dehm, 1962
                                       19 Genus Glaucomys Thomas, 1908 - American flying squirrels
                                       20 Genus Aeretes Allen, 1940 - groove-toothed flying squirrel
                                       21 Genus Eupetaurus Thomas, 1888 - woolly flying squirrel
                                       22 Genus Petaurillus Thomas, 1908 - pygmy flying squirrels
                                       23 Genus Belomys Thomas, 1908 - hairy-footed flying squirrel
                                       24 Genus Trogopterus Heude, 1898 - complex-toothed flying squirrel
                                       25 Genus Aeromys Robinson & Kloss, 1915 - large black flying squirrels
                                       26 Genus Pteromyscus Thomas, 1908 - smoky flying squirrel
                                       27 Genus Biswamoyopterus Saha, 1981 - Namdapha flying squirrel
                                       28 Genus Olisthomys Carter, 1942
                                       29 Genus Iomys Thomas, 1908 - Horsfield's flying squirrel