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EN
We present the results of a terrestrial mollusc inventory in the Cybina River Valley (W.Poland). The species richness in 39 sites served as a biodiversity criterion for the whole area. The total number of 3,193 specimens collected represented 51 species (22 families), i.e. about 60% of terrestrial snail species of the whole Wielkopolska region. Species regarded as rare in the region and in the whole country constituted 22% of the whole material. Two of them are especially noteworthy: Vertigo angustior Jeffreys (Annex II, EU Habitats Directive), and Ruthenica filograna (Rossmässler) which is very rare in the region.
EN
This is the first publication of the series summarising the current state of knowledge on mollusc biodiversity and distribution in Wielkopolska (W. Poland). Here, we give a historical background of the research conducted so far in the region; we describe the geography and environmental conditions which hale determined the present shape of the region’s malacocoenoses. We also present a short summary of the results of the studies carried out in the region. Data from 89 publications and 73 unpublished papers (4,155 localities) show that 167 mollusc species were recorded from Wielkopolska during the last fifty years.
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