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 Reptilia Linnaeus, 1758 - reptiles
               Subclass Lepidosauria Duméril & Bibron, 1839
                 Order Squamata Oppel, 1811
                   Suborder Serpentes Linnaeus, 1758 - snakes
                     Infraorder Henophidia Hoffstetter, 1939 see Superfamily Henophidia Hoffstetter, 1939
                       Family Boidae Gray, 1825 - pythons and boas
                         1 Subfamily Loxoceminae - Mexican dwarf pythons see Family Loxocemidae Cope, 1861
                         2 Subfamily Pythoninae Fitzinger, 1826 - pythons see Family Pythonidae Fitzinger, 1826
                         3 Subfamily Boinae Gray, 1825 - boas see Family Boidae Gray, 1825
                         4 Subfamily Bolyeriinae Hoffstetter, 1946 - Round Island boas see Family Bolyeriidae Hoffstetter, 1946