Xenodon merremii (Wagler in Spix, 1824)

Type locality. Salvador, state of Bahia, Brazil .

Distribution. Known from Argentina, Bolivia, Brazil, and Paraguay and Venezuela, associated to the open South American diagonal (Plt. 400A). In Brazil, widespread in Atlantic Forest, Araucaria Forest, Pampa Grasslands, Cerrado, Pantanal, Caatinga, with marginal records in Amazonia and Chiquitano Dry Forest (Plt. 400A), from low to high elevations (Plt. 400B). Observed in the field in open areas, including grassland, savanna, and disturbed areas (Sawaya et al., 2008; Valdujo et al., 2009).