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Atractus darienensis MYERS, 2003

IUCN Red List - Atractus darienensis - Data Deficient, DD

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common Names 
SynonymAtractus darienensis MYERS 2003
Atractus darienensis — WALLACH et al. 2014: 70 
DistributionPanama (Darién)

Type locality: at 500 m elevation above sea level on the north end of the Serranía de Pirre, Province of Darién, eastern Panama. The type locality, a temporary forest camp, is situated roughly at 8°00’N, 77°43’W.  
TypesHolotype: KU 110274 
DiagnosisDIAGNOSIS: Atractus darienensis can be distinguished from other Panamanian and most South American species by the pattern of black markings on a medium brown (reddish brown in life) ground color. There are a few black saddles on the neck which are several times wider than the alternating or medially connected black bars that occupy the rest of the body; the shiny scales make this pattern less obvious in life (fig. 6) than when the snake is immersed in liquid (fig. 1B). Atractus hostilitractus also has black markings that are anteriorly wider, but these are partially separated by pale rings, and the posterior bars are less numerous than in darienensis and set on a much lighter ground color (fig. 1D); A. hostilitractus also has black supralabials, and the snout in profile is remindful of a coral snake (fig. 9B). Atractus darienensis resembles A. imperfectus in having white labials, a similarly vague nuchal collar, and a similar snout shape in profile (compare fig. 9A and 9C). Atractus imperfectus, however, has pale bars or broken rings on a black neck (fig. 10 [posterior pattern unknown]), dark serration across upper edges of the supralabials, a relatively larger eye, broader snout, and a dorsally more extensive rostral plate (fig. 3). These differences are elaborated under Atractus imperfectus (after MYERS 2003). 
EtymologyNamed after an adjective derived from the eastern Panamanian Province of Darién. 
  • Myers, C.W. 2003. Rare Snakes—Five New Species from Eastern Panama: Reviews of Northern Atractus and Southern Geophis (Colubridae: Dipsadinae). American Museum Novitates 3391: 1-47 - 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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