Water snails introduced into the botanic garden in Cracow
Five species of molluscs, including Melanoides tuberculata (O. F. Muller, 1774) and Helisoma duryi (Wetherby, 1879) occur in a water basin, in the hothouse of the Botanic Garden in Cracow. The first mentioned snail inhabits a. o. the Near East and Eastern Africa while the latter one Florida and Southern Africa. Another species Physa acuta Draparnaud, 1805 spreads from the Southern Europe and for 30 years is adapted to polluted and heated waters in industrial regions in Southern Poland. Key WordS: freshwater molluscs, Gastropoda, Thiaridae, Planorbidae, Physidae, invasive species Folia Malacologica 5/1993 was originally published as No. 1462 of Scientific Bulletins of University of Mining and Metallurgy, Cracow. This digitalised version was prepared by the Association of Polish Malacologists and first published on line on December 30th, 2016. http:/dx.doi.org/10.12657/folmal.005.005 Folia Malacol. 5:109 113