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 [Tupaia gracilis gracilis]ᵀ Thomas, 1893