[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Deuterostomia Grobben, 1908 see Infrakingdom Deuterostomia Grobben, 1908
           Phylum Chordata Bateson, 1885 - chordates
             Subphylum Vertebrata Cuvier, 1812 - vertebrates
               Superclass Tetrapoda Goodrich, 1930 - tetrapods see Clade Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]
                 Class Reptilia Linnaeus, 1758 - reptiles
                   Subclass Lepidosauria Duméril & Bibron, 1839
                     Order Squamata Oppel, 1811
                       Suborder Serpentes Linnaeus, 1758 - snakes
                         01 Family Typhlopidae Merrem, 1820 - blind snakes
                         02 Family Leptotyphlopidae Stejneger, 1891 - slender blind snakes
                         03 Family Boidae Gray, 1825 - pythons and boas
                         04 Family Aniliidae Stejneger, 1907 - cylinder snakes
                         05 Family Uropeltidae Müller, 1831 - shield-tail snakes
                         06 Family Xenopeltidae Bonaparte, 1845 - sunbeam snakes
                         07 Family Colubridae Oppel, 1811 - colubrids
                         08 Family Elapidae Boie, 1827
                         09 Family Hydrophiidae Oppel, 1811 - sea snakes see Subfamily Hydrophiinae Oppel, 1811
                         10 Family Viperidae Oppel, 1811 - vipers and pit vipers