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Hydrodynastes melanogigas FRANCO, FERNANDES & BENTIM, 2007

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Higher TaxaColubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Subspecies 
Common Names 
SynonymHydrodynastes melanogigas FRANCO, FERNANDES & BENTIM 2007
Hydrodynastes gigas — BRANDÃO & PERES 2001
Hydrodynastes gigas — PUORTO & BARBARINI 2004
Hydrodynastes melanogigas — WALLACH et al. 2014: 339 
DistributionBrazil (Tocantins)

Type locality: Municipality of Palmas (10° 12’ 46’’S, 48° 21’37’’ W, 230 m elevation), State of Tocantins, Brazil. Map legend:
Type locality - Type locality.
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.
 
Reproductionoviparous 
TypesHolotype: IBSP 65796 adult male, collected between 21–30 January 2002 by Marisa M.T. da Rocha, Myriam E.V. Calleffo, and Silvia R. Travaglia-Cardoso. 
CommentVenomous!

Diagnosis: the new species is distinguished from H. gigas and the two subspecies of H. bicinctus by having a general melanistic color pattern, with head and dorsum of the body mostly dark-brown to black; absence of postocular stripe; venter grayish-brown, with dark rounded blotches outlining two lateral stripes which become gradually paler towards the posterior region of the belly, disappearing after midbody. It is further distinguished from the two subspecies of H. bicinctus by having two apical pits, and 16–17 prediastemal teeth. 
References
  • Brandão, R. A. & Peres Jr., A. K. 2001. Levantamento da Herpetofauna na área de influência do aproveitamento hidroelétrico Luís Eduardo Magalhães, Palmas, TO. Humanitas, 3: 35–50.
  • FRANCO, FRANCISCO L.; DANIEL S. FERNANDES & BRUNO M. BENTIM 2007. A new species of Hydrodynastes Fitzinger, 1843 from central Brazil (Serpentes: Colubridae: Xenodontinae). Zootaxa 1613: 57–65 - get paper here
  • Marques, Otavio A. V.; Karina R. S. Banci, and Christine Strüssmann 2013. Death-feigning behaviour in water snakes of the genus Hydrodynastes (Dipsadidae) from South America. Herpetology Notes 6: 95-96 - get paper here
  • Puorto, G. & Barbarini, C. C. 2004. Coleção Herpetológica do Museu de Zoologia do Centro Universitário Luterano de Palmas – MZCEULP. Humanitas, 4/6: 31–38
  • 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.
 
External links  
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As link to this species use URL address:

http://reptile-database.reptarium.cz/species?genus=Hydrodynastes&species=melanogigas

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