Hypsiglena
{{Automatic taxobox | name = Hypsiglena | image = Hypsiglena torquata jani.jpg | image_caption = Texas night snakeHypsiglena jani texana | taxon = Hypsiglena | authority = Cope, 1860 | synonyms = Leptodeira (part) – Günther, 1860 Pseudodipsas W. Peters, 1860 Comastes Jan, 1863 <ref>Tanner WW (1944). "A Taxonomic Study of the Genus ' 'Hypsiglena ". Great Basin Naturalist 5 (3 & 4): 25-92.</ref> Eridiphas Leviton & W.W. Tanner, 1960 | range_map = Hypsiglena torquata distribution.svg | range_map_caption = }}Hypsiglena is a genus of small, rear-fanged, colubrid snakes commonly referred to as night snakes. The genus consists of nine species, and subspecies have been maintained pending further investigation.Mulcahy DG, Martínez-Gómez JE, Aguirre-León G, Cervantes-Pasqualli JA, Zug GR (2014). "Rediscovery of an endemic vertebrate from the remote Islas Revillagigedo in the eastern Pacific Ocean: The Clarión Nightsnake, with conservation and systematic implications". PLOS ONE 9 (5): e97682. Species and subspecies The following species and subspecies are recognized as being valid.Hypsiglena affinis Boulenger, 1894 Hypsiglena catalinae W.W. Tanner, 1966 - Santa Catalina night snakeHypsiglena chlorophaea Cope, 1860 - desert night snakeHypsiglena chlorophaea chlorophaea Cope, 1860- Sonoran night snakeHypsiglena chlorophaea deserticola W.W. Tanner, 1966 - Great Basin night snakeHypsiglena chlorophaea loreala W.W. Tanner,