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Helicops scalaris JAN, 1865

IUCN Red List - Helicops scalaris - Least Concern, LC

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Common NamesE: Ladder Keelback (Hoge's Keelback) 
SynonymHelicops scalaris JAN 1865: 250
Helicops scalaris — BOULENGER 1893: 279
Helicops hogei LANCINI 1964 (fide ROSSMAN
Helicops scalaris — PETERS & OREJAS-MIRANDA 1970: 125
Helicops hogei — PETERS & OREJAS-MIRANDA 1970: 124
Helicops hogei — KORNACKER 1999: 88
Helicops scalaris — KORNACKER 1999: 89
Helicops hogei — RIVAS et al. 2012
Helicops scalaris — RIVAS et al. 2012
Helicops scalaris — WALLACH et al. 2014: 323
Helicops hogei — NATERA-MUMAW et al. 2015: 181
Helicops scalaris — NATERA-MUMAW et al. 2015: 182 
DistributionVenezuela (Zulia), Colombia

hogei: Venezuela (TF Amazonas, Delta Amacuro); Type locality: Río Autana, Territorio Federal Amazonas, Venezuela.

Type locality: Venezuela.  
Reproductionviviparous (Braz et al. 2016) 
TypesHolotype: MRSN (= MSNTO = MZUT), a 410 mm specimen. 
CommentSynonymy: RIVAS et al. 2012 recognize Helicops hogei as distinct, but note that “a reassessment of the species is suggested in order to support its validity (see Rossman 2002)”. 
  • Boulenger, G.A. 1893. Catalogue of the snakes in the British Museum (Nat. Hist.) I. London (Taylor & Francis), 448 pp. - get paper here
  • Braz, Henrique B.; Rodrigo R. Scartozzoni, Selma M. Almeida-Santos 2016. Reproductive modes of the South American water snakes: A study system for the evolution of viviparity in squamate reptiles. Zoologischer Anzeiger 263: 33-44; doi:10.1016/j.jcz.2016.04.003 - get paper here
  • Costa, Henrique C.; Diego J. Santana, Fernando Leal, Ricardo Koroiva, and Paulo C.A. Garcia 2016. A New Species of Helicops (Serpentes: Dipsadidae: Hydropsini) from Southeastern Brazil. Herpetologica 72 (2): 157-166 - get paper here
  • Jan, G. 1865. Enumerazione sistematica degli ofidi appartenenti ai gruppo Potamophilidae. Archive per la Zoologia, l’Anatomia et la Fisiologia 3 (2): 201-265 - get paper here
  • Kawashita-Ribeiro, Ricardo Alexandre; Robson Waldemar Ávila, and Drausio Honorio Morais 2013. A New Snake of the Genus Helicops Wagler, 1830 (Dipsadidae, Xenodontinae) from Brazil. Herpetologica 69 (1): 80-90. - get paper here
  • Kornacker,P.M. 1999. Checklist and key to the snakes of Venezuela. PaKo-Verlag, Rheinbach, Germany, 270 pp.
  • Lancini,A.R. 1964. Publicaciones Ocasionales del Museo de Ciencias Naturales Venezuela, Caracas, 7: 2
  • Lancini,A.R. & Kornacker,P.M. 1989. Die Schlangen von Venezuela. Armitano Editores C.A., Caracas, 1-381
  • MORAES-DA-SILVA, ANTONIO; RENATA CECÍLIA AMARO, PEDRO M. SALES NUNES, CHRISTINE STRÜSSMANN, MAURO JUNIOR TEIXEIRA, ALBEDI JR. ANDRADE, VINÍCIUS SUDRÉ, RENATO RECODER, MIGUEL TREFAUT RODRIGUES, FELIPE FRANCO CURCIO 2019. Chance, luck and a fortunate finding: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes: Xenodontinae), from the Brazilian Pantanal wetlands. Zootaxa 4651 (3): 445–470 - get paper here
  • 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
  • Pérez-Santos,C. & Moreno, A.G. 1988. Ofidios de Colombia. Museo reegionale di Scienze Naturali, Torino, Monographie VI, 517 pp.
  • 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
  • Rossman, D. 2002. Variation in the xenodontid water snake Helicops scalaris Jan, and the status of H. hogei Lancini. Occasional Papers of the Museum of Natural Science (78): 1-18. [Louisiana State University] - 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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