Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Mammalia Linnaeus, 1758 - mammals
               Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
                 Order Primates Linnaeus, 1758 - primates
                   Suborder Prosimiae Milne Edwards see Infraorder Strepsirrhini "Geoffroy Saint-Hilaire, 1812"
                     Infraorder Tupaiiformes see Order Scandentia Wagner, 1855
                       Family Tupaiidae Gray, 1825 - tree shrews
                         Subfamily Ptilocercinae Lyon, 1913 see Family Ptilocercidae Lyon, 1913
                           Genus Ptilocercus Gray, 1848 - pen-tailed tree shrew, feather-tailed tree shrew
                             1 Ptilocercus lowii Gray, 1848 - feather-tailed tree shrew