The Ponto-Caspian parasite Plagioporus cf. skrjabini reaches the River Rhine system in Central Europe: higher infestation in the native than in the introduced Danubian form of the gastropod Theodoxus fluviatilis.

Rothmeier, L. M., Sahm, R., Watermann, B., Grabow, K., Koester, M., Cichy, A., Martens, A., (2021). Hydrobiologia 848(10), 2569-2578. Springer, Dordrecht, Netherlands. English language

Division activities in x-cells of North Sea dab Limanda limanda.

Watermann, B., Schmidt, W. B., Peters, N., (1993). Diseases of Aquatic Organisms 17(2), 137-143. English language