Wilson S. SerraMatías ZaruckiAlejandro DuarteEdward D. BurressFranco Teixeira de MelloIvan González‐BergonzoniMarcelo Loureiro2026-03-222026-03-22201310.15560/9.6.1576https://doi.org/10.15560/9.6.1576https://andeanlibrary.org/handle/123456789/52399Citaciones: 3In this article the authors present the first report of four characiform fish species for Uruguay, extending their current distribution to the middle and lower Uruguay River basin: Astyanax saguazu Casciotta, Almirón and Azpelicueta, 2003; Hypobrycon poi Almirón, Casciotta, Azpelicueta and Cione, 2001; Leporinus amae Gody, 1980; Cyphocharax saladensis (Meinken, 1933). These species were previously recorded from either the upper Uruguay River, Patos-Merín lagoon system or Paraná River. Color pattern in life for A. saguazu and H. poi are described for the first time.enCharaciformesGeographyFisheryDrainage basinFish <Actinopterygii>CharacidaeEcologyBiologyarticle