Gobio nigrescens, from the Hari River drainage, is redescribed. It represents a valid species distinguished from congeners in the adjacent Caspian and Aral Sea basins by a combination of characters: a naked breast, 16 circumpeduncular scales and 6-7 irregularly shaped, black or brown blotches on back behind dorsal-fin base.

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http://dx.doi.org/10.11646/zootaxa.4114.1.4DOI Listing

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