Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
       Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
         01 Genus Sciurus Linnaeus, 1758 - tree squirrels
         02 Genus Syntheosciurus Bangs, 1902 - Neotropical montane squirrel see Genus Sciurus Linnaeus, 1758
         03 Genus Microsciurus Allen, 1895 - American pygmy squirrels
         04 Genus Sciurillus Thomas, 1914 - Neotropical pygmy squirrel
         05 Genus Prosciurillus Ellerman, 1947 - Sulawesi dwarf squirrels
         06 Genus Rheithrosciurus Gray, 1867 - groove-toothed squirrel
         07 Genus Tamiasciurus Trouessart, 1880 - American red squirrels
         08 Genus Funambulus Lesson, 1832 - palm squirrels
         09 Genus Ratufa Gray, 1867 - Oriental giant squirrels
         10 Genus Protoxerus Forsyth Major, 1893 - African giant squirrels
         11 Genus Epixerus Thomas, 1909 - African palm squirrels
         12 Genus Funisciurus Trouessart, 1880 - African striped squirrels
         13 Genus Paraxerus Forsyth Major, 1893 - African bush squirrels
         14 Genus Heliosciurus Trouessart, 1880 - sun squirrels
         15 Genus Hyosciurus Archbold & Tate, 1935 - Sulawesi long-nosed squirrels
         16 Genus Myosciurus Thomas, 1909 - African pygmy squirrel
         17 Genus Callosciurus Gray, 1867 - Oriental tree squirrels
         18 Genus Tamiops Allen, 1906 - Oriental striped squirrels
         19 Genus Rubrisciurus Ellerman, 1954
         20 Genus Sundasciurus Moore, 1958 - Sunda squirrels
         21 Genus Menetes Thomas, 1908 - Berdmore's palm squirrel
         22 Genus Rhinosciurus Gray, 1843 - long-nosed squirrel
         23 Genus Lariscus Thomas & Wroughton, 1909 - Malaysian striped ground squirrels
         24 Genus Dremomys Heude, 1898 - red-cheeked squirrels
         25 Genus Sciurotamias Miller, 1901 - rock squirrels
         26 Genus Nannosciurus Trouessart, 1880 - black-eared squirrel
         27 Genus Exilisciurus Moore, 1958 - pygmy squirrels
         28 Genus Atlantoxerus Forsyth Major, 1893 - Barbary ground squirrel
         29 Genus Xerus Hemprich & Ehrenberg, 1832 - African ground squirrels
         30 Genus Spermophilopsis Blasius, 1884 - long-clawed ground squirrel
         31 Genus Marmota Blumenbach, 1779 - marmots
         32 Genus Cynomys Rafinesque, 1817 - prairie dogs
         33 Genus Spermophilus Cuvier, 1825 - ground squirrels
         34 Genus Ammospermophilus Merriam, 1892 - antelope-squirrels
         35 Genus Tamias Illiger, 1811 - chipmunks