Abstract
The Žehuňský rybník National Nature Monument (Central Bohemia, Czech Republic) contains a pond (258 ha) with extensive wetlands in its surroundings. Aquatic molluscs of this area were studied in years 2005–2019. Altogether, 34 species were found at 29 sites. Anisus vortex, Planorbis planorbis, Valvata cristata, Stagnicola turricula, Bithynia tentaculata, Bathyomphalus contortus and Planorbarius corneus belonged to the most often recorded species, while 16 species were found at only 1–3 sites. Only old shells of two bivalves (Unio crassus, U. tumidus) were found. Rare and endangered bivalves Sphaerium nucleus and Pisidium pseudosphaerium inhabit large area of the wetlands. One non-native species, Ferrissia californica, was found.
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