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Atractus paucidens (DESPAX, 1910)

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Despax's Ground Snake 
SynonymAtractopsis paucidens DESPAX 1910: 372
Atractus paucidens — SAVAGE 1955
Atractus paucidens — PASSOS & ARREDONDO 2009
Atractus paucidens — WALLACH et al. 2014: 79 
DistributionNW Ecuador

Type locality: Santo Domingo de los Colorados, Prov. Pichincha, Ecuador (00º15’S, 79º09’W, ca. 600 m elevation)  
TypesHolotype: MNHN-RA 1906.0245, adult female from Santo Domingo de Los Colorados, province of Pichincha, Ecuador 
DiagnosisDiagnosis: Atractus paucidens is distinguished from all congeners by the following combination of characters: (1) 17/17/17 smooth dorsals; (2) two postoculars; (3) loreal long; (4) temporals generally 1+2; (5) generally seven supralabials, third and fourth contacting orbit; (6) seven infralabials, first four contacting chinshields; (7) five or six maxillary teeth; (8) generally four gular scale rows; (9) four preventrals; (10) 169– 190 ventrals in females, 169–175 in males; (11) 31–38 subcaudals in females, 43–45 in males; (12) dorsal ground colour black with narrow cream bands on the flanks; (13) venter beige, heavily scattered with black dots to uniformly black; (14) moderate body size in females 419 mm SVL and small in males 263 mm SVL; (15) tail long in females (15.1–16.0% SVL) and males (18.6–21.3% SVL); (16) hemipenis moderately bilobed [from PASSOS et al. 2009]. 
CommentSynonymy: The taxonomic validity of A. paucidens was not recognized by Arteaga et al. (2013), owing to its close morphological resemblance to A. modestus (Boulenger, 1894). 
  • Arteaga AF, Bustamante-Enríquez LM and Guayasamin JM 2013. The Amphibians and Reptiles of Mindo. - get paper here
  • Despax, R. 1910. Mission géodésique de l’Équateur. Collections recueillies par M. le Dr Rivet. Liste des ophidiens et descriptions des espèces nouvelles. (Note préliminaire.). Bull. Mus. natl. Hist. nat. Paris 16: 368-376 - get paper here
  • Passos, P. & Arredondo, J.C. 2009. Rediscovery and redescription of the Andean earth-snake Atractus wagleri (Reptilia: Serpentes: Colubridae). Zootaxa 1969: 59–68 - get paper here
  • Passos, P.; Mueses-Cisneros, J.J.; Lynch, J.D. & Fernandes, R. 2009. Pacific lowland snakes of the genus Atractus (Serpentes: Dipsadidae), with description of three new species. Zootaxa 2293: 1–34 - 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
  • Torres-Carvajal O, Pazmiño-Otamendi G, Salazar-Valenzuela D. 2019. Reptiles of Ecuador: a resource-rich portal, with a dynamic checklist and photographic guides. Amphibian & Reptile Conservation 13 (1): [General Section]: 209–229 (e178) - 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.
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