Amphibia, Anura, Hylidae, Scinax fuscomarginatus: distribution extension

The treefrog genus Scinax currently comprises 73 species occurring in Brazil. Scinax fuscomarginatus is a small species in the Scinax ruber clade (Faivovich 2002; Faivovich et al. 2005), with about 20 mm of snout-vent length (Figure 1). Treefrogs of the S. ruber clade occur from Mexico to Argentina and may have originated in South America (Leon 1969). Scinax fuscomarginatus is typical from open areas such as those of Pantanal and Cerrado (Brasileiro et al. 2005; Toledo and Haddad 2005a; b), occurring in the central portion of Brazil (Haddad et al. 2008) and also in eastern Bolivia, Paraguay, and Argentina (Frost 2007). In spite of this wide distribution, its geographic range is still unclear, and some populations can be found in open areas of unexpected biomes, such as the Atlantic Forest (Freitas and Silva 2007). Furthermore, the austral boundaries of its distribution remain unclear.