Hydrodynastes gigas (Duméril et al., 1854)

Type locality. Province of Corrientes, Argentina .

Distribution. Known from Argentina, Bolivia, Brazil, and Paraguay (Plt. 274A). In Brazil, recorded in the Cerrado, Atlantic Forest, Pantanal, Chiquitano Dry Forest and Amazonia (Plt. 274A), mostly at low elevations (Plt. 274B). Observed in the field in wetlands, in gallery forest, and savanna (Santos-Costa, 2003; Bernarde and Abe, 2006).