River Wolga / Pontic/Lower Danube River / River Rhine / Adriatic Sea / Caucasus / Danube River / Blackwell Publishing Ltd River / Danube / Pontic/ Azov Sea / Ticino River / Black sea / River Po / Alpine / Caspian sea / Pontic/Asow Sea / River Dnepr / Po Valley / /
Organization
§Universität Trier / Institute for Biodiversity and Ecosystem Dynamics / Zoological Institute / Department of Herpetology / Institut für Zoologie / Institute of Cytology / ‡Universität Mainz / Russian Academy of Sciences / University of Amsterdam / /