Elaps triangularis Wagler 1824: 5. Type locality: Ega (= Tefé) Lago Tefé, at confluence with Rio Amazon, Brazil. Hydrops triangulari...

Hydrops caesurus Scrocchi, Ferreira, Giraudo, Avila and Motte 2005. Type locality: Departamento Itapúa, Isla Paloma, Canal de los Jesuit...

Coluber angulatus Linnaeus 1758: 217.  Type locality: “Asia” (in error). Coluber alidras Linnaeus 1758: Coluber Surinamensis Shaw 180...

Elaps Martii Wagler 1824. Type locality: Provincia Maranhao, Rio Itapicuru, Brazil Hydrops Martii  — Wagler 1830: 170 Homalopsis Marti...

Holotype: UFMT-R 8512, adult male, collected on 27 October 2009 by Carolina L. Cavlac. Diagnosis. Helicops apiaka sp. nov. is distinguis...