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Atractus depressiocellus MYERS, 2003

IUCN Red List - Atractus depressiocellus - Data Deficient, DD

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common Names 
SynonymAtractus depressiocellus MYERS 2003
Atractus depressiocellus — WALLACH et al. 2014: 71 
DistributionPanama (Panamá), Colombia Chocó

Type locality: Cerro Azul [Cerro Jefe] region, Province of Panamá, Panama. The type locality is in the general region of Cerro Jefe on the Piedras-Pacora Ridge, at about
9°14’N, 79°23’W  
Reproductionoviparous 
TypesHolotype: AMNH 119876 
DiagnosisDIAGNOSIS: Atractus depressiocellus is immediately distinguished from other Panamanian Atractus by its large size, relatively uniform dorsal pattern of irregularly paired black cross-lines on a brown ground, and very small eyes that are notably depressed on a broad, relatively short head. It is the only Panamanian Atractus in which head length (tip of snout to end of parietals) is equalled by head width. In total length, Atractus depressiocellus approaches A. obesus from Andean Colombia and the Amazonian A. major and A. torquatus. These differ from depressiocellus in color pattern (photographs in Marx, 1960; Martins and Oliveira, 1993) and in various features of scutellation. Atractus depressiocellus also differs noticeably from these in its very small depressed eye and in the associated feature of exceptionally tall supralabials 3–5. It may be unique in either lacking or in having exceptionally tiny internasals (from MYERS 2003). 
Comment 
EtymologyNamed after the depressed, very small eyes, and hence the specific name, a noun in apposition, is derived from the Latin adjective depressus (low or depressed) and the noun ocellus (a little eye). 
References
  • Echavarría-Rentería, Jonard David; Vanessa Mosquera-Moya, Jhon Tailor Rengifo-Mosquera 2015. Ampliación del rango de distribución de Atractus depressiocellus Myers, 2003 (Serpentes: Dipsadidae) para Colombia. Cuad. herpetol. 29 (2): 157-159
  • Martins M. & Oliveira M E. 1993. The snakes of the genus Atractus Wagler (Reptilia: Squamata: Colubridae) from the Manaus region, central Amazonia, Brazil. Zoologische Mededelingen 67 (1-26): 21-40. - get paper here
  • Marx, Hymen 1960. A new colubrid snake of the genus Atractus. Fieldiana Zoology 39 (38): 411-413 - get paper here
  • 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
  • Passos, P., Dobiey, M., & Venegas, P. J. 2010. Variation and natural history notes on giant groundsnake, Atractus gigas (Serpentes: Dipsadidae). South American J. Herp. 5 (2): 73-82 - get paper here
  • Ray, Julie M. and Patty Ruback 2015. Updated checklists of snakes for the provinces of Panamá and Panamá Oeste, Republic of Panama. Mesoamerican Herpetology 2 (2): 168-188 - 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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