Fig. 1From: Integrative taxonomic approach to the cryptic diversity of Diplostomum spp. in lymnaeid snails from Europe with a focus on the ‘Diplostomum mergi’ species complexMap of the Ruhr river system in Germany with sampling sites. Abbreviations: Ba, Baldeneyesee; He, Hengsteysee; Hn, Hennetalsperre; So, Sorpetalsperre; Ve, Versetalsperre. Lymnaea stagnalis; Radix auricularia; Radix peregra; Stagnicola palustris Back to article page