On the Freshwater Snails of Strandzha Mountains and its Adjacent Coastal Area

Six species of freshwater snails were newly recorded to the area of Strandzha Mts (Bulgaria): Acroloxus lacustris, Anisus spirorbis, Aplexa hypnorum, Planorbarius corneus, Gyraulus albus, and G. laevis. An updated check list was provided for this area containing a total of 27 species. The sum of the Palearctic and Holarctic species is highest in number (34%) but the percentage of local endemics is high too (27%). These endemics inhabit a fewvery restricted spring sites in the karstic regions of the mountains and belong to the genera Bythinella, Radomaniola and Strandzhia.