FIGURE 3. Map of the southeastern South America showing the geographic distribution of Bunocephalus larai (type locality- grey triangle; non-types- grey squares) and B. hertzi (holotype black triangle; paratypes- black circles) in the upper Rio Paraná basin. 1—Rio Paranaíba; 2—Rio Grande; 3—Rio Paraná; 4—Rio São Marcos; 5—Rio Capivari; 6—Rio Pardo; 7—Rio Mogi-Guaçu; 8—Rio Piracicaba; 9—Rio Tietê; 10—Rio Ivinhema; 11—Rio Paranapanema; 12—Rio Pirapó; 13—Rio Tibagi; 14—Rio das Cinzas.