Oxyrhopus rhombifer Duméril et al., 1854

Type locality. Province of Corrientes, Argentina .

Distribution. Known from Argentina, Bolivia, Brazil, Paraguay, and Uruguay (Plt. 322A). In Brazil, widespread in Pampas Grassland, Cerrado, central and southern Atlantic Forest, and Araucaria Forest, with marginal records in Chiquitano Dry Forest,Pantanal,Caatinga,and Amazonian savannas (Plt. 322A) at low to high elevations (Plt. 322B). Observed in the field in grassland, savanna and disturbed areas (Cunha and Nascimento, 1993; Lema, 1994; Giraudo and Scrocchi, 2002; FranÇa and Araújo, 2006; FranÇa et al., 2006; Sawaya et al., 2008; Forlani et al., 2010),