Helicops (snake)

Helicops is a genus of snakes of the family Colubridae. The genus is endemic to South America.

Species
The following 20 species are recognized as being valid.
 * Helicops acangussu Moraes-da-Silva, Walterman, Citeli, Sales-Nunes & Curcio, 2022
 * Helicops angulatus (Linnaeus, 1758) – brown-banded water snake
 * Helicops apiaka Kawashita-Ribeiro, Ávila & Morais, 2013
 * Helicops boitata Moares-da-Silva, Amaro, Sales-Nunes, Strüssmann, Teixeira, Andrade, Sudré, Recoder, Rodrigues & Curcio, 2019
 * Helicops carinicaudus (Wied-Neuwied, 1825) – Wied's keelback
 * Helicops danieli Amaral, 1938 – Daniel's keelback
 * Helicops gomesi Amaral, 1921 – São Paulo keelback
 * Helicops hagmanni Roux, 1910 – Hagmann's keelback
 * Helicops infrataeniatus Jan, 1865
 * Helicops leopardinus (Schlegel, 1837) – leopard keelback
 * Helicops modestus Günther, 1861 – olive keelback
 * Helicops nentur Costa, Santana, Leal, Koroiva & Garcia, 2016
 * Helicops pastazae Shreve, 1934 – Shreve's keelback
 * Helicops petersi Rossman, 1976 – spiral keelback
 * Helicops phantasma Moraes Da Silva, Amaro, Sales-Nunes, Rodrigues & Curcio, 2021
 * Helicops polylepis Günther, 1861 – Norman's keelback
 * Helicops scalaris Jan, 1865 – ladder keelback
 * Helicops tapajonicus da Frota, 2005
 * Helicops trivittatus (Gray, 1849) – equatorial keelback
 * Helicops yacu Rossman & Dixon, 1975 – Peru keelback

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Helicops.