Class Mammalia Linnaeus, 1758 - mammals Order Scandentia Wagner, 1855 - tree shrews Family Tupaiidae Gray, 1825 - tree shrews Subfamily Ptilocercinae Lyon, 1913 see Family Ptilocercidae Lyon, 1913 1 Genus Ptilocercus Gray, 1848 - pen-tailed tree shrew, feather-tailed tree shrew