Currently accepted to occur throughout much of the Amazon basin (Brazil, Ecuador, Peru, Bolivia, and questionably Colombia), as well as the Río Essequibo (Guyana and Venezuela), some smaller, coastal drainages in north-east Brazil/the Guianas, and further south in the Río Paraná (Brazil, Paraguay, and Argentina) and Río Uruguay (Brazil, Uruguay, and Argentina).
Type locality is ‘Cuiabá and Mato Grosso, Brazil’.
