Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
         Subfamily Sciurinae Batsch, 1788 - tree and ground squirrels
           Genus Ratufa Gray, 1867 - Oriental giant squirrels
             1 Ratufa affinis Raffles, 1821 - cream-coloured giant squirrel
             2 Ratufa bicolor (Sparrmann, 1778) - black giant squirrel
             3 Ratufa indica (Erxleben, 1777) - Indian giant squirrel
             4 Ratufa macroura Pennant, 1769 - grizzled Indian squirrel