Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Scandentia Wagner, 1855 - tree shrews
       Family Tupaiidae Gray, 1825 - tree shrews
         Genus Tupaia Raffles, 1821 - tree shrews
           Tupaia gracilis Thomas, 1893 - slender tree shrew
             1 [Tupaia gracilis gracilis]ᵀ Thomas, 1893
             2 Tupaia gracilis edarata Lyon, 1913
             3 Tupaia gracilis inflata Lyon, 1906