The Jedlový důl Nature Reserve is located in the central part of the Jizerské hory PLA near the village of Josefův Důl in northern Bohemia. The reserve protects a geomorphologically important mountain valley with rocks, waterfalls, semi-natural forests on talus slopes, and rare montane plant and animal species. The local mountain biotopes are quite acidophilic, represented by a few springs, mountain brook, beech woods, and mixed talus slope forests with the predominance of spruce. Thus the surveyed malacofauna with 18 species (17 terrestrial gastropods and 1 bivalve) is relatively poor. Currently, forest and ubiquitous species are dominant there and are widespread in the Jizerské hory PLA.