Leporinus unitaeniatus is a species of freshwater ray-finned fish belonging to the family Anostomidae, the toothed headstanders. It is found in the Araguaia River and Tocantins River, Brazil.Garavello, J.C. and G.M. Santos, 2009. Two new species of Leporinus Agassiz, 1829 from Araguaia-Tocantins system, Amazon basin, Brazil (Ostoriophysi, Anostomidae). Brazilian J. Biol. 69 (1):109-116.
Description Leporinus unitaeniatus can reach a standard length of .
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