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Atractus duidensis ROZE, 1961

IUCN Red List - Atractus duidensis - Least Concern, LC

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Venezuela Ground Snake 
SynonymAtractus duidensis ROZE 1961: 110
Atractus duidensis — PETERS & OREJAS-MIRANDA 1970: 28
Atractus duidensis — KORNACKER 1999: 63
Atractus duidensis — PASSOS et al. 2013
Atractus duidensis — WALLACH et al. 2014: 71 
DistributionVenezuela (Cerro Duida, TF Amazonas)

Type locality: Cumbre del Cerro Duida, Territorio Federal Amazonas, Venezuela, 03°25’N, 65°40’W; ca. 2050 m elevation.  
TypesHolotype: AMNH 36609, adult male, collected on 28 January 1929 by members of the Tyler-Duida expedition. Paratype. Adult female, AMNH 36607, same data as holotype. 
DiagnosisDiagnosis. Atractus duidensis can be distinguished from all congeners by the following combination of characters (data between brackets are those of Roze, 1961): (1) smooth dorsal scale rows 17/17/17; (2) postoculars two; (3) loreal long; (4) temporals 1 + 2; (5) supralabials seven, third and fourth contacting orbit; (6) infralabials seven, first three contacting chin shields; (7) maxillary teeth eight or nine; (8) gular scale rows three; (9) preventrals two or three; (10) ventrals 171 [173] and 156 in the single female and male, respectively; (11) subcaudals 36 [35] in the single female, male tail incomplete; (12) in preservation, dorsum uniform grayish brown to black in adults; (13) in preservation, venter creamish yellow anteriorly, gradually invaded by brown dots, becoming uniform brown posteriorly in adults; (14) body size moderate, female reaching 400 mm [415] and male 306 mm [315] SVL; (15) tail moderate in female (13.7% [11.7] SVL) [PASSOS et al. 2013]. 
EtymologyNamed after the type locality. 
  • Hoogmoed, M.S. 1982. Snakes of the Guianan Region. Mem. Inst. Butantan 46: 219-254. - get paper here
  • Kornacker,P.M. 1999. Checklist and key to the snakes of Venezuela. PaKo-Verlag, Rheinbach, Germany, 270 pp.
  • Lancini,A.R. & Kornacker,P.M. 1989. Die Schlangen von Venezuela. Armitano Editores C.A., Caracas, 1-381
  • Natera-Mumaw, Marco; Luis Felipe Esqueda-González & Manuel Castelaín-Fernández 2015. Atlas Serpientes de Venezuela. Santiago de Chile, Dimacofi Negocios Avanzados S.A., 456 pp. - get paper here
  • Passos, Paulo; Philippe J. R. Kok, Nelson R. de Albuquerque, and Gilson A. Rivas 2013. Groundsnakes of the Lost World: A Review of Atractus (Serpentes: Dipsadidae) from the Pantepui Region, Northern South America. Herpetological Monographs 27 (1): 52-86 - get paper here
  • RIVAS, GILSON A.; CÉSAR R. MOLINA, GABRIEL N. UGUETO, TITO R. BARROS, CÉSAR L. BAR- RIO-AMORÓS & PHILIPPE J. R. KOK 2012. Reptiles of Venezuela: an updated and commented checklist. Zootaxa 3211: 1–64 - get paper here
  • Roze, Jánis A. 1961. El genero Atractus (Serpentes: Colubridae) en Venezuela. Acta Biologica Venezuelica 3 (7): 103-119
  • 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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