Chironius bicarinatus (Wied, 1820)

Type locality. Lake near Rio Jucu, Vila Velha, state of Espírito Santo, Brazil .

Distribution. Known from Argentina, Brazil, Paraguay, and Uruguay (Plt. 116A). In Brazil, widespread in Atlantic Forest, with marginal records in the Pampas Grassland and isolated records in Cerrado and Caatinga (Plt. 116A), at low to high elevations (Plt. 116B). Doubtful records in Bolivia (Embert, 2008) not mapped. Previous maps and taxonomy in Dixon et al. (1993). Observed in the field in forest (Dixon et al., 1993; Silva Jr. and Sites, 1995; Argôlo, 2004; Loebmann and Haddad, 2010).