Bothrops alternatus Duméril et al., 1854

Type locality. Paraguay .

Distribution. Known from Argentina, Brazil, Paraguay, and Uruguay in the southern portion of the South American open diagonal (Plt.53A).In Brazil,recorded in Pampas Grasslands, Araucaria Forest, and the southern portions of the Atlantic Forest and Cerrado (Plt. 53A) at low to high elevations (Plt. 53B). Previous maps and taxonomy in Campbell and Lamar (2004). Observed in the field in savanna, wetland, gallery forest, grassland, and disturbed areas (Lema, 1987; Silva Jr. and Sites, 1995; Giraudo and Scrocchi, 2002; Campbell and Lamar, 2004; Sawaya et al., 2008; São-Pedro and Pires, 2009).