64061 Characidium xanthopterum Silveira, Langeani, da Graça, Pavanelli & Buckup, 2008 Crenuchidae South American darters Characidiinae Characiformes Teleostei South America: tributaries of the rio Paranaíba drainage, upper rio Paraná basin, and tributaries to the upper rio Tocantins basin in Brazil. DZSJRP 17 S 48 W Characidium xanthopterum