Distribution of Pisidium globulare Clessin, 1873 (Mollusca: Bivalvia) in the Czech Republic and Slovakia with notes to its ecology and morphological characters

In this paper the first particular records of the pill clam Pisidium globulare Clessin, 1873 from the Czech Republic and Slovakia are published. All these data were obtained by revision of extensive voucher material (altogether 642 lots from a similar number of sites). Altogether, P. globulare was found in 18 sites in the Czech Republic and in one site in Slovakia. Results of pore density measurement and ecological preferences of the species are compared with published data and conclusions are presented.