living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         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
                     Superfamily Booidea Gray, 1825
                       1 Family Loxocemidae Cope, 1861
                       2 Family Xenopeltidae Bonaparte, 1845 - sunbeam snakes
                       3 Family Aniliidae Stejneger, 1907 - cylinder snakes
                       4 Family Uropeltidae Müller, 1831 - shield-tail snakes
                       5 Family Boidae Gray, 1825 - pythons and boas
                       6 Family Bolyeridae see Family Bolyeriidae Hoffstetter, 1946
                       7 Family Tropidophiidae Brongersma, 1951