First record of Phenacorhamdia tenebrosa (Schubart, 1964) (Siluriformes, Heptapteridae) from the Paraná river basin in Argentina. Author Giorgis, Pablo Parque Nacional Pre-Delta, 25 de Mayo 389, 3105 Diamante, Entre Rios, Argentina Author Ciotek, Liliana Parque Nacional Pre-Delta, 25 de Mayo 389, 3105 Diamante, Entre Rios, Argentina Author Almirón, Adriana División Zoología Vertebrados, Facultad de Ciencias Naturales y Museo de La Plata, UNLP, Paseo del Bosque, 1900 La Plata, Argentina. aalmiron @ fcnym. unlp. edu. ar aalmiron@fcnym.unlp.edu.ar Author Casciotta, Jorge División Zoología Vertebrados, Facultad de Ciencias Naturales y Museo de La Plata, UNLP, Paseo del Bosque, 1900 La Plata, Argentina. aalmiron @ fcnym. unlp. edu. ar aalmiron@fcnym.unlp.edu.ar text Ichthyological Contributions of PecesCriollos 2012 2012-09-01 24 1 4 journal article 298655 10.5281/zenodo.11558202 a60e219d-e760-40d0-b873-d35d0c4d40d5 1868-3703 11558202 The genus Phenacorhamdia has been erected by Dahl (1961) and comprises small South American catfishes. This genus includes the following eleven valid species (Bockmann & Guazelli 2003; Ferraris 2007 ; Do Nascimiento & Milani 2008): Phenacorhamdia anisura (Mees, 1987) and P. provenzanoi DoNascimiento & Milani, 2008 inhabiting the Orinoco river basin, Venezuela ; P. taphorni Do Nascimiento & Milani, 2008 from the Apure river drainage, Venezuela ; P. boliviana (Pearson, 1924) distributed in the upper Mamoré/Madeira river basin, Bolivia ; P. macarenensis Dahl 1961 , from Guaviare river basin, Colombia ; P. nigrolineata Zarske 1998 , from Ucayali river basin, Perú ; P. tenuis (Mees, 1986) distributed in the Maroni/Marowijne river basin, French Guiana ; and the Brazilian species P. hoehnei (Miranda Ribeiro, 1914) from Taquari river basin; P. somnians (Mees, 1974) from Das Morte river basin; P. tenebrosa (Schubart, 1964) from the upper Paraná and São Francisco river basins; and P. unifasciata Britski, 1993 , from the upper Paraná river basin. During field trips in the Paraná river basin, Argentina , four specimens of P. tenebrosa were found in the lower Paraná river basin at Yaciretá dam near Ituzaingó city, and one in the arroyo La Azotea at Pre-Delta National Park . The aim of this paper is to register for the first time the finding of this species in freshwaters of Argentina .