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Helicops carinicaudus (WIED-NEUWIED, 1825)

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
SubspeciesHelicops carinicaudus carinicaudus WIED-NEUWIED 1825
Helicops carinicaudus triserialis LINDHOLM in LAMPE & LINDHOLM 1902 
Common NamesE: Wied's Keelback
G: Kielschwanznatter 
SynonymColuber carinicaudus WIED-NEUWIED 1825: 300
Homalopsis carinicaudus — SCHLEGEL 1837: 350
Helicops carinicaudus — WAGLER 1830: 170
Helicops carinicaudus — GÜNTHER 1861: 427
Helicops carinicaudus — DUMÉRIL, BIBRON & DUMÉRIL 1854: 744
Helicops carinicaudus — BOULENGER 1886: 435
Helicops carinicauda — BOULENGER 1893: 276
Helicops carinicaudus — PETERS et al. 1970: 123
Helicops carinicaudus — PONTES et al. 2008
Helicops carinicaudus — WALLACH et al. 2014: 321 
DistributionBrazil (Espirito Santo, Rio Grande do Sul, Rio de Janeiro)

triserialis: Type locality: Brasilien [Brasil]; Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
Reproductionviviparous (Braz et al. 2016) 
TypesHolotype: AMNH 3365, a 909 mm specimen.
Holotype: MWNH 857 (now lost) [triserialis] 
CommentSubspecies: Helicops carinicaudus infrataeniatus is now considered a valid species (see Helicops infrataeniatus). Photos printed in Uruguay (Achaval & Olmos, 2003, 2007, Carreira et al., 2005) present Helicops H. carinicaudus as H. infrataeniatus (T. de Lema, pers. comm., 3 Feb 2017).

Synonymy: Helicops carinicaudus triserialis could presumably represent a junior
synonym of Helicops infrataeniatus (Jan, 1865) (see Hofstadler Deiques & Zanini Cechin 1990, Cei 1993).

Distribution: Not in Argentina according to  GIRAUDO & SCROCCHI 2002. Not in Uruguay according to CARREIRA et al. (2005). One report from Colombia is questionable (Pérez-Santos & Moreno 1988).

Type species: Coluber carinicaudus WIED-NEUWIED 1825 is the type species of the genus Helicops WAGLER 1828.

Diagnosis (genus): Helicops is the most diverse genus of Hydropsini with 16 extant species (Kawashita-Ribeiro et al. 2013), diagnosed by the presence of nude flounces on the lobes of the hemipenis (Zaher 1999). Externally, Helicops species can be easily identified by the position of the eyes and nostrils toward the top of the head, single internasal scale, cloacal shield divided, and some or all dorsal scales keeled (Peters and Orejas-Miranda 1970). 
  • Bérnils, R.S.; Batista, M.A. & Bertelli, P.W. 2001. Cobras e lagartos do Vale: levantamento das espécies de Squamata (Reptilia, Lepidosauria) da Bacia do Rio Itajai, Santa Catarina, Brasil. Rev. Est. Ambientais (Blumenau) 3 (1): 69-79
  • Boulenger, G.A. 1886. A synopsis of the reptiles and batrachians of the province Rio Grande do Sul, Brazil. Ann. Mag. nat. Hist. (5) 18: 423-445 - get paper here
  • 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
  • Castro, T.M. & Teixeira, R.L. 2007. Straßenverkehr als Bedrohung für die Amphibien und Reptilien des Atlantischen Regenwalds in Südost-Brasilien. Eine Fallstudie. Sauria 29 (2): 35-42 - 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 Jun 2016, Vol. 72, No. 2: 157-166
  • Deiques,C.H. & CECHIN,S.T.Z. 1991. O status de Helicops carinicaudus (WIed 1825) (Serpentes: Colubridae). Acta biol. leopoldensia 12 (2): 313-326
  • Freiberg, M.A. 1982. Snakes of South America. T.F.H. Publications, Neptune City, NJ, 189 pp.
  • Giraudo, A. R., and G. J. Scrocchi 2002. Argentinian Snakes: An Annotated Checklist. Smithsonian Herp. Inf. Serv. (132): 1-53 - get paper here
  • Günther, A. 1861. On the ophidian genus Helicops. Ann. Mag. Nat. Hist. (3) 7: 425-428 - get paper here
  • Hamdan, B.; D.P. Coelho; A.B. D’Angiolella; E.J.R. Dias; R.M. Lira-da-Silva. 2013. The Reptile Collection of the Museu de Zoologia, Universidade Federal da Bahia, Brazil. Check List 9 (2):257-262 - get paper here
  • Hoffman, Marlene; Rogério L. Teixeira & Thiago M. Castro 2007. Bemerkungen über die Kielschwanznatter Helicops carinicaudus (WIED-NEUWIED, 1825)(Squamata Colubridae) in einer landwirtschaftlich genutzten Gegend in Südost Brasilien. Ophidia 1 (2) - 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
  • Köhler, J. & Güsten, R. 2007. Herpetological type specimens in the natural history collections of the museums in Darmstadt and Wiesbaden, Germany. Spixiana 30 (2): 275-288 - get paper here
  • Lampe, E. & Lindholm, W.A. 1902. Catalog der Reptilien- und Amphibian-Sammlung (Schlangen; Frosch-, Schwanz- und Schleichenlurche) des Naturhistorischen Museums zu Wiesbaden, mit Bemerkungen. Jahrbuch des Nassauischen Vereins für Naturkunde, Wiesbaden 55: 1–66 - get paper here
  • Oliveira Lula Salles, R. de & Silva-Soares, T. 2010. Répteis do município de Duque de Caxias, Baixada Fluminense, Rio de Janeiro, Sudeste do Brasil. Biotemas, 23 (2): 135-144
  • Pérez-Santos,C. & Moreno, A.G. 1988. Ofidios de Colombia. Museo reegionale di Scienze Naturali, Torino, Monographie VI, 517 pp.
  • Peters, James A.; Donoso-Barros, Roberto & Orejas-Miranda, Braulio 1970. Catalogue of the Neotropical Squamata: Part I Snakes. Part II Lizards and Amphisbaenians. Bull. US Natl. Mus. 297: 347 pp. - get paper here
  • Pontes, J.A.L.; Figueiredo, J.P., Pontes, RC. and Rocha, C.F.D. 2008. Snakes from the Atlantic Rainforest area of Serra do Mendanha, in Rio de Janeiro state, southeastern Brazil: a first approximation to the taxocenosis composition. Braz. J. Biol. 68(3): 601-609 - get paper here
  • Schlegel, H. 1837. Essai sur la physionomie des serpens. Partie Descriptive. La Haye (J. Kips, J. HZ. et W. P. van Stockum), 606 S. + xvi - get paper here
  • Silva-Soares, T.; R.B. Ferreira; R.O.L. Salles; C.F.D. Rocha. 2011. Continental, insular and coastal marine reptiles from the municipality of Vitória, state of Espírito Santo, southeastern Brazil. Check List 7 (3): 290-298 - get paper here
  • Vrcibradic, D.; C.F.D. Rocha; M.C. Kiefer; F.H. Hatano; A.F. Fontes; M. Almeida-Gomes; C.C. Siqueira; J.A.L. Pontes; V.N.T. Borges-Junior; L.O. Gil; T. Klaion; E.C.N. Rubião; M. Sluys. 2011. Herpetofauna, Estação Ecológica Estadual do Paraíso, state of Rio de Janeiro, southeastern Brazil. Check List 7 (6): 745-749 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
  • Wied-Neuwied, M. 1824. Verzeichniss der Amphibien, welche im zweyten Bande der Naturgeschichte Brasiliens vom Prinz Max von Neuwied werden beschrieben werden. Isis von Oken 14: 661—673 [columns] - get paper here
  • Wied-Neuwied, M. Prinz zu 1825. Beiträge zur Naturgeschichte von Brasilien. Weimar, no. 1, xxii + 612 pp. - get paper here
  • Yuki R N. 1994. Regarding Helicops danieli Amaral, 1937, with a description of the hemipenis (Serpentes, Colubridae, Xenodontinae).[in Portugese]. BOLETIM DO MUSEU PARAENSE EMILIO GOELDI SERIE ZOOLOGIA. 1994. vol. 10, no. 2, pp. 203-209.
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