Oligosarcus is a genus of 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:
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Oligosarcus acutirostris Menezes, 1987
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Oligosarcus amome Almirón, Casciotta, Piálek, Doubnerová & Říčan, 2015
[Almirón, A., Casciotta, J., Piálek, L., Doubnerová, K. & Říčan, O. (2015): Oligosarcus amome (Ostariophysi: Characidae), a new species from the río Uruguay basin, Misiones, Argentina. Zootaxa, 3915 (4): 581–590.]
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Oligosarcus argenteus Günther, 1864
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Oligosarcus bolivianus (Fowler, 1940)
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Oligosarcus brevioris Menezes, 1987
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Oligosarcus hepsetus (Georges Cuvier, 1829)
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Oligosarcus itau Mirande, Aguilera & Azpelicueta, 2011
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Oligosarcus jacuiensis Menezes & A. C. Ribeiro, 2010
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Oligosarcus jenynsii (Günther, 1864)
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Oligosarcus longirostris Menezes & Géry, 1983
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Oligosarcus macrolepis (Steindachner, 1877)
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Oligosarcus menezesi Miquelarena & Protogino, 1996
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Oligosarcus oligolepis (Steindachner, 1867)
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Oligosarcus paranensis Menezes & Géry, 1983
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Oligosarcus perdido A. C. Ribeiro, Cavallaro & Froehlich, 2007
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Oligosarcus pintoi Amaral Campos, 1945
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Oligosarcus planaltinae Menezes & Géry, 1983
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Oligosarcus platensis (Emil Messner, 1962)
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Oligosarcus robustus Menezes, 1969
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Oligosarcus schindleri Menezes & Géry, 1983
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Oligosarcus solitarius Menezes, 1987
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Oligosarcus varii Menezes & A. C. Ribeiro, 2015
[Menezes, N.A. & Ribeiro, A.C. (2015): A new species of the lowland Oligosarcus Günther species group (Teleostei: Ostariophysi: Characidae). Neotropical Ichthyology, 13 (3): 541-546.]
