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Hypsiglena catalinae TANNER, 1966

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common NamesIsla Santa Catalina Nightsnake 
SynonymHypsiglena torquata catalinae TANNER 1966
Hypsiglena chlorophaea catalinae — MULCAHY 2008
Hypsiglena catalinae — MULCAHY et al. 2014 
DistributionMexico (Isla Santa Catalina, Gulf of California)

Type locality: "Santa Catalina Island, approximately 25° 38' N, 110° 47' W, Gulf of California, Baja California, Mexico". Map legend:
Type locality - Type locality.
 
Reproduction 
TypesHolotype: SDSNH 44680; paratypes SDSNH 
CommentTANNER (1966) separated H. t. catalinae from H. torquata of the adjacent peninsula on the basis of the former having a single series of large dorsal spots, two rows of lateral spots, and a high number of ventral plus scutes (233-295).

Synonymy: However, since the aforementioned characters do not discretely diagnose catalinae GRISMER (1999) suggested to synonymize catalinae with H. torquata. MULCAHY (2008) considered catalinae as a valid subspecies (of Hypsiglena chlorophaea) and elevated it to full species status in 2014. WALLACH et al. 2014: 344 lists this (sub-) species as synonym of H. chlorophaea.

Distribution: see map of subspecies in Mulcahy et al. 2014. 
References
  • Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp
  • 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, Wilmer W. 1966. The night snakes of Baja California. Transactions of the San Diego Society of Natural History 14 (15): 189-196 - get paper here
 
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