25911 Romanogobio kesslerii (Dybowski, 1862) Gobionidae Gudgeons Cypriniformes Teleostei Kessler's gudgeon Europe: Dniestr and tributaries of lower and middle Danube drainage (Black Sea basin); upper Vistula drainage in Poland (Baltic Basin). Systematics of sand gudgeon has not been resolved and several species seem to be confused under the name of <i>Romanogobio kesslerii</i>. FSJF 461 49 N 23 E Romanogobio kesslerii AMNH 20661 1960 Gobio kessleri AMNH 20674 1960 Gobio kessleri AMNH 20689 1960 Gobio kessleri AMNH 20656 1961 Gobio kessleri AMNH 20676 1961 Gobio kessleri AMNH 20681 1961 Gobio kessleri