Oxynoemacheilus euphraticus (Bănărescu & Nalbant, 1964)

Distribution in the area. Endemic. Widespread in headwaters of the Euphrates and Tigris in Turkey, Iraq, and Iran.

Taxonomic note. In the upper Tigris drainage, this species seems to have hybridized with O. kurdistanicus . Mitochondrial DNA of both species has been found in superficially very similar fish. More research is needed to resolve this case and the distribution of both species in the Tigris drainage. Oxynoemacheilus freyhofi from the Karun drainage is a synonym.