Reptilia - Squamata - Colubridae
Parent taxon: Colubridae according to O. Kuhn 1946
See also Cope 1871, Cope 1875, Gadow 1898 and Perrier 1928
Sister taxa: Abastor, Aglypha, Alsophis, Apostolepis, Bascanium, Carphophis, Cemophora, Chilomeniscus, Chionactis, Coluber owenii, Colubrinae, Coniophanes, Contia, Cyclophis, Dakotaophis, Dendrelaphis, Dipsadinae, Dromicus, Dryinoides, Drymarchon, Eutaenia, Farancia, Gyalopion, Haldea, Helicops, Hierophis, Hispanophis, Homalopsinae, Hypsiglena, Leioheterodon, Lodia, Lycodon, Malpolon, Mionatrix, Naja sauvagei, Natricinae, Ophibolus, Opisthoglypha, Osceola, Palaelaphis, Palaeomalpolon, Palaeonatrix, Paleofarancia, Pantherophis, Paraoxybelis, Phimothyra, Pollackophis, Pseudoboa, Pseudocemophora, Pylmophis, Rhinechis, Rhinocheilus, Scaptophis, Sibon, Sonora, Spilotes, Storeria, Tachyophis, Tantilla, Thamnophis, Tretanorhinus, Trimorphodon, Tropidoclonium, Tropidonotus, Xenodontinae, Zamenis
Subtaxa: Conocerca Platycerca
Ecology: ground dwelling carnivore