New and little-known freshwater Mollusks of Ukrainian Transcarpathian

Abstract

One species is new for the regional fauna (Sphaerium nucleus), another three are rare and their range is strictly limited to a few localities (Musculium lacustre, Bythinella sp. and Terrestribythinella baidashnikovi). It is discovered one additional locality of alien species Sinanodonta woodiana recently introduced into the Transcarpathian. Images of the shells, comments on taxonomy, distribution and ecology of these species are provided.