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 see Infraphylum Vertebrata Lamarck, 1801
            | Class Mammalia Linnaeus, 1758 - mammals
            |   Subclass Eutheria Gill, 1872 see Infraclass Eutheria Gill, 1872
            |     Order Primates Linnaeus, 1758 - primates
            |       Suborder Simiae see Parvorder Anthropoidea Mivart, 1864
            |         Infraorder Catarrhina see Superfamily Cercopithecoidea Gray, 1821
            |           Superfamily Hominoidea Gray, 1825
            |             Family Hominidae Gray, 1825
            |               Subfamily Homininae Gray, 1825
            |                 Genus Homo Linnaeus, 1758 - people
            |                   Homo sapiens Linnaeus, 1758 - human
             Class Reptilia Linnaeus, 1758 - reptiles
               Subclass Lepidosauria Duméril & Bibron, 1839
                 Order Squamata Oppel, 1811
                   Suborder Serpentes Linnaeus, 1758 - snakes
                     Infraorder Caenophidia Hoffstetter, 1939 see Superfamily Xenophidia
                       Family Colubridae Oppel, 1811 - colubrids
                         Subfamily Xenodontinae (Bonaparte, 1845) see Subfamily Dipsadinae Guenther, 1858
                           Genus Heterodon Latreille, 1801
                           Genus Xenodon Boie, 1826