Altogether, 40 mollusc species were recorded during the research of five localities in the Tichá Orlice River valley (East Bohemia, Czech Republic). The high species richness is in accordance with ...high habitat diversity of the studied area. One new species (Oxychilus glaber) was recorded for the first time in the Tichá Orlice River valley.
Altogether, 78 terrestrial mollusc species were recorded on 31 plots in a stretch of the Tichá Orlice River valley between the cities Choceň and Letohrad (East Bohemia, Czech Republic) in 2007 and ...2009. This region harbours 46% of the total terrestrial mollusc fauna of the Czech Republic. The fairly high species richness corresponds to a high habitat diversity and species pool of the region that includes Alpine and Carpathian elements. Of prime conservation importance is a high share of rare and endangered species (EN-2, VU-9, NT-14 species) and species mostly having an isolated population there from the main distribution range. This region is a real hotspot of forest gastropods in Transalpine Europe.
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