Coluber angulatus Linnaeus 1758: 217. Type locality: “Asia” (in error).
Coluber alidras Linnaeus 1758:
Coluber Surinamensis Shaw 1802: 460
Natrix aspera Wagler 1824: 37
Helicops angulatus — Wagler 1830: 171
Helicops fumigatus Cope 1868: 308
Helicops cyclops Cope 1868: 309
Uranops angulatus — Sclater 1891: 45
Helicops angulata — Beebe 1946: 28
Coluber alidras Linnaeus 1758:
Coluber Surinamensis Shaw 1802: 460
Natrix aspera Wagler 1824: 37
Helicops angulatus — Wagler 1830: 171
Helicops fumigatus Cope 1868: 308
Helicops cyclops Cope 1868: 309
Uranops angulatus — Sclater 1891: 45
Helicops angulata — Beebe 1946: 28
Distribution, Venezuela (Amazonas, Apure, Bolivar, Monagas, Delta Amacuro, Sucre, Portuguesa, Anzoátegui, Guárico, Cojedes), Colombia, Brazil (Pará, Rondonia, Goias, Mato Grosso, Sergipe, S Ceará, Acre etc.), Bolivia, Peru, Trinidad, Ecuador, French Guiana.