Menetus dilatatus (Gould, 1841) in de Maas bij Borgharen

In July 1996 the presence of the North American freshwater snail Menetus dilatatus (Gould, 1841) was located in the river Meuse off Maastricht (weir of Borgharen). This immigrant is found in several countries of Europe where it lives under different circumstances. In England and France M. dilatatus is found mostly in rivers. On the other hand the species is comitted to relative warm water locations (cooling water discharge plumes) in Germany and Poland. Therefore it is still doubtfull if the species is able to survive in the river Meuse in the future.