Elaps triangularis Wagler 1824: 5. Type locality: Ega (= Tefé) Lago Tefé, at confluence with Rio Amazon, Brazil.
Hydrops triangularis – Wagler 1830: 170
Hydrops triangularis bassleri Roze 1957:83
Hydrops triangularis bolivianus Roze 1957:86
Hydrops triangularis fasciatus Roze 1957:76
Hydrops triangularis neglectus Roze 1957:81
Hydrops triangularis neglectus Roze 1957:81
Hydrops triangularis venezuelensis Roze 1957:78
Distribution. Amazonas, Orinoco and Guyana drainages includes Bolivia, Venezuela, Guyana, Surinam, French Guiana, Trinidad, E Peru, Ecuador, Brazil, Colombia, and Argentina. Type locality: Ega (= Tefé) Lago Tefé, at confluence with Rio Amazon, Brazil.
