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Hypsiglena affinis BOULENGER, 1894

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Rio Grande de Santiago Nightsnake
S: Nocturna de Boulenger 
SynonymHypsiglena affinis BOULENGER 1894: 210
Hypsiglena affinis — TAYLOR 1939: 370
Hypsiglena affinis — TANNER 1946: 46 (1944)
Hypsiglena affinis — MULCAHY 2008
Hypsiglena affinis — WALLACH et al. 2014: 343 
DistributionMexico (Jalisco, Zacatecas, Nayarit)

Type locality: Zacatecas, Jalisco  
Reproductionoviparous 
TypesHolotype: BMNH 1946.1.1.21-23 
DiagnosisDiagnosis: A Hypsiglena with only one preocular, seven labials, and only 19 dorsal rows of scales (Tanner 1946: 47).


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Comment 
EtymologyFrom the Latin affīnis meaning allied denoting the relationship with the species Hypsiglena torquata. 
References
  • Bañuelos-Alamillo, Jorge A. and Rubén Alonso Carbajal-Márquez. 2016. Distribution Notes. Hypsiglena affinis Boulenger, 1894. Mesoamerican Herpetology 3 (1): 198 - get paper here
  • Boulenger, George A. 1894. Catalogue of the snakes in the British Museum (Natural History). Volume II., Containing the Conclusion of the Colubridæ Aglyphæ. British Mus. (Nat. Hist.), London, xi, 382 pp. - get paper here
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • Loc-Barragán JA, Smith GR, Woolrich-Piña GA, Lemos-Espinal JA 2024. An updated checklist of the amphibians and reptiles of Nayarit, Mexico with conservation status and comparison with adjoining States. Herpetozoa 37: 25-42 - get paper here
  • 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 Lost and Found. PLoS One 9 (5): e97682. doi:10.1371/journal.pone.0097682 - get paper here
  • Mulcahy, Daniel G. 2008. Phylogeography and species boundaries of the western North American Nightsnake (Hypsiglena torquata): Revisiting the subspecies concept. Molecular Phylogenetics and Evolution 46 (3): 1095-1115 - get paper here
  • Sigala-Rodríguez JJ, Carbajal-Márquez RA, Encarnación-Luévano A, Lara-Galván JL, Bañuelos-Alamillo JA, Centenero-Alcalá E, Ahumada-Carrillo IT, Carmona-Torres FH 2026. Annotated checklist of the amphibians and reptiles of Zacatecas, Mexico. ZooKeys 1281: 21-48 - get paper here
  • Tanner, W. W. 1946. A taxonomic study of the genus Hypsiglena. Great Basin Naturalist 5 (3-4): 25-92 [1944] - get paper here
  • Taylor, Edward H. 1939. On Mexican snakes of the genera Trimorphodon and Hypsiglena. Univ. Kansas Sci. Bull. 25 (16): 357-383 [1938] - get paper here
  • Wallach, Van; Kenneth L. Williams, Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • Woolrich-Piña, Guillermo A, Paulino Ponce-Campos, Jesús Loc-Barragán, Juan Pablo Ramírez-Silva, Vicente Mata-Silva, Jerry D. Johnson, Elí García-Padilla and Larry David Wilson. 2016. The herpetofauna of Nayarit, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 3 (2): 376-448 - get paper here
 
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