Oligosarcus is a genus of characins from freshwater habitats in northern Argentina, Paraguay, Uruguay, eastern Bolivia, and southern and central Brazil (South, Southeast and Central-West regions). They reach up to in length and are predators that mainly feed on smaller fish. Species There are currently 22 recognized species in this genus: Oligosarcus acutirostris Menezes, 1987 Oligosarcus amome Almirón, Casciotta, Piálek, Doubnerová & Říčan, 2015 Oligosarcus argenteus Günther, 1864 Oligosarcus bolivianus (Fowler, 1940) Oligosarcus brevioris Menezes, 1987 Oligosarcus hepsetus (G. Cuvier, 1829) Oligosarcus itau Mirande, Aguilera & Azpelicueta, 2011 Oligosarcus jacuiensis Menezes & A. C. Ribeiro, 2010 Oligosarcus jenynsii (Günther, 1864) Oligosarcus longirostris Menezes & Géry, 1983 Oligosarcus macrolepis (Steindachner, 1877) Oligosarcus menezesi Miquelarena & Protogino, 1996 Oligosarcus oligolepis (Steindachner, 1867) Oligosarcus paranensis Menezes & Géry, 1983 Oligosarcus perdido A. C. Ribeiro, Cavallaro & Froehlich, 2007 Oligosarcus pintoi Amaral Campos, 1945 Oligosarcus planaltinae Menezes & Géry, 1983 Oligosarcus platensis (Messner, 1962) Oligosarcus robustus Menezes, 1969 Oligosarcus schindleri Menezes & Géry, 1983 Oligosarcus solitarius Menezes, 1987 Oligosarcus varii Menezes & A. C. Ribeiro, 2015 References Characidae Taxa named by Albert Günther Fish of South America