First record of Leporinus tigrinus from the Middle Paraná River basin, Argentina.

Leporinus tigrinus Borodin, 1929, is an anostomid species currently considered native to the Araguaia/Tocantins, Xingu and Tapajos River basins. The species has been progressively reported from downstream points of the Upper Paraná River basin in Brazil and it is considered a putative invasive species. Here we provide new southern records of this species from the Middle Paraná River basin in Argentina, collected from the Yabebiry stream thus extending the species’ distribution range approximately 300 km downstream from the Piracema inlet, the previous most southern distribution limit.