Hypsiglena affinis BOULENGER, 1894

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Higher Taxa	Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Rio Grande de Santiago Nightsnake S: Nocturna de Boulenger
Synonym	Hypsiglena 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
Distribution	Mexico (Jalisco, Zacatecas, Nayarit) Type locality: Zacatecas, Jalisco
Reproduction	oviparous
Types	Holotype: BMNH 1946.1.1.21-23
Diagnosis	Diagnosis: A Hypsiglena with only one preocular, seven labials, and only 19 dorsal rows of scales (Tanner 1946: 47). Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 357 characters) are available for collaborators and contributors. Please contact us for details.
Comment
Etymology	From 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 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
External links	National Center for Biotechnology Information Google images

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