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 Callosciurus Gray, 1867 - Oriental tree squirrels
             01 Callosciurus adamsi Kloss, 1921 - ear-spot squirrel
             02 Callosciurus albescens Bonhote, 1901
             03 Callosciurus baluensis Bonhote, 1901 - Kinabalu squirrel
             04 Callosciurus caniceps Gray, 1842 - grey-bellied squirrel
             05 Callosciurus erythraeus Pallas, 1779 - belly-banded squirrel
             06 Callosciurus finlaysonii Horsfield, 1823 - Finlayson's squirrel
             07 Callosciurus inornatus Gray, 1867
             08 Callosciurus melanogaster Thomas, 1895
             09 Callosciurus nigrovittatus Horsfield, 1823 - black-banded squirrel
             10 Callosciurus notatus (Boddaert, 1785) - plantain squirrel
             11 Callosciurus orestes Thomas, 1895 - Bornean black-banded squirrel
             12 Callosciurus phayrei Blyth, 1856
             13 Callosciurus prevostii Desmarest, 1822 - Prevost's squirrel
             14 Callosciurus pygerythrus I. Geoffroy Saint Hilaire, 1833 - Irrawaddy squirrel
             15 Callosciurus quinquestriatus Anderson, 1871
             16 Callosciurus notatus species group
             17 Callosciurus caniceps species group