Bothrops diporus Cope, 1862

Type locality. Río Bermejo region, on the boundary between Paraguay and Argentina .

Distribution. Known from Argentina, Brazil, and Paraguay, in the southern portion of the South American open diagonal (Plt. 58A). In Brazil, recorded in Atlantic Forest, Araucaria Forest, and Pampas Grasslands (Plt. 58A) from low to intermediate elevations (Plt. 58B). Previous maps and taxonomy in Silva and Rodrigues (2008). Observed in the field in semideciduous, flooded and mixed (with Araucaria) forest, and also in dry scrubland, grassland and disturbed areas (Campbell and Lamar, 2004; Giraudo et al., 2008).