[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
Family Viperidae Oppel, 1811 - vipers and pit vipers
Subfamily Viperinae Oppel, 1811 - pitless vipers
Genus Vipera Laurenti, 1768