Distribution. SW Atlantic in SE Brazil (N to Espirito Santo State), Uruguay, and N Argentina (S to Golfo San Matias in N Patagonia); relatively common on both Uruguayan and Argentinian sides of La Plata River Estuary. The species is not continuously distributed, and there are two areas in its N distribution where it is extremely rare or absent. in Pontoporiidae

Distribution. SW Atlantic in SE Brazil (N to Espirito Santo State), Uruguay, and N Argentina (S to Golfo San Matias in N Patagonia); relatively common on both Uruguayan and Argentinian sides of La Plata River Estuary. The species is not continuously distributed, and there are two areas in its N distribution where it is extremely rare or absent.Published as part of Russell A. Mittermeier & Don E. Wilson, 2014, Pontoporiidae, pp. 386-393 in Handbook of the Mammals of the World – Volume 4 Sea Mammals, Barcelona :Lynx Edicions on page 393, DOI: 10.5281/zenodo.660767