Micrurus nattereri Schmidt, 1952

Type locality. Between Guaramaco and San Fernando de Atabapo (see Hoge and Lancini, 1960), upper Río Orinoco, Venezuela .

Distribution. Known from Brazil, Colombia, and Venezuela (Plt. 102A). In Brazil, restricted to northwestern Amazonia, north of the Amazon and west or Rio Negro (Plt. 102A), at low elevations (Plt. 102B). Previous maps and taxonomy in Roze (1996), Campbell and Lamar (2004), and Silva Jr. et al. (2016). Observed in the field in forest, rivers, and wetlands (Roze, 1996; Silva Jr. et al., 2016).