Frota, J. G. da. (2005). New species of Helicops Wagler, 1830 (Serpentes, Colubridae) from Tapajós river, Amazon region, Brazil. Phyllomedusa: Journal of Herpetology, 4(1), 61-67. https://doi.org/10.11606/issn.2316-9079.v4i1p61-67