New discovery of the Ukrainian brook lamprey in Croatia

The Ukrainian brook lamprey Eudontomyzon mariae was collected in two streams belonging to the Sava river basin in Croatia. The great variation in morphological characters of this species is emphasized and its description is augmented. Clinal variation in the trunk myomeres, total length and the oral disc dentition is detected. (C) 2000 The Fisheries Society of the British Isles.