Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Order Scandentia Wagner, 1855 - tree shrews Family Ptilocercidae Lyon, 1913 Genus Ptilocercus Gray, 1848 - pen-tailed tree shrew, feather-tailed tree shrew Ptilocercus lowii Gray, 1848 - feather-tailed tree shrew Ptilocercus lowii continentis Thomas, 1910