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The recent research has shown a high malacological value of the Skalní Potok Nature Reserve that had never been searched for molluscs. The reserve hosts 49 mollusc species, which represents almost 20% of the entire Czech malacofauna. Such richness can be explained mainly by a high habitat diversity of the target area. Several types of forest such as ravine forests, alder carrs, herb-rich beech forests and spruce forests alternate on the area of 2 km². Among endangered species, the most interesting findings represent sensitive species from the family Clausiliidae, chiefly Bulgarica cana, Clausilia cruciata, and Ruthenica filograna. This area deserves the strictest protection as the reserve belongs to one of the well-preserved remnants of deciduous leaf forests in the Hrubý Jeseník Mts.