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Atractus occidentalis SAVAGE, 1955

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Common NamesWestern Ground Snake 
SynonymAtractus occidentalis SAVAGE 1955
Atractus occidentalis — PETERS & OREJAS-MIRANDA 1970: 32
Atractus occidentalis — WALLACH et al. 2014: 78 
DistributionNW Ecuador

Type locality: Mindo, Provincia Pinchincha, Ecuador. Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
TypesHolotype: BMNH 1916.5.23.5 
CommentSynonymy: The taxonomic validity of A. occidentalis was not recognized by Arteaga et al. (2013), owing to its close morphological resemblance to A. dunni (Savage, 1955).

Diagnosis: A form showing closest similarity in coloration to Atractus ecuadorensis in scutellation to A. dunni, but differing from them and other Ecuadorian Atractus in: (1) 17 scale rows; (2) long loreal; (3) maxillary teeth six or seven; (4) ventrals in male, 153, in females, 162; and (5) pattern of irregular or disrupted longitudinal stripes [from SAVAGE 1960]. 
EtymologyThe specific name occidentalis (Latin) refers to the western distribution of this species. 
  • Arteaga AF, Bustamante-Enríquez LM and Guayasamin JM 2013. The Amphibians and Reptiles of Mindo. - get paper here
  • Savage, Jay M. 1955. Descriptions of new colubrid snakes, genus Atractus, from Ecuador. Proc. Biol. Soc. Washington 68: 11-20 - get paper here
  • Savage,J.M. 1960. A revision of the Ecuadorian snakes of the colubrid genus Atractus. Misc. Publ. Zool. Univ. Michigan 112: 1-86 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
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