Monacha cartusiana (O. F. Müller, 1774) (Gastropoda: Pulmonata: Hygromiidae) becomes more frequent in Poland

Abstract

Monacha cartusiana (O. F. Müller, 1774) was found at new sites in Poland: in Janikowo near Inowroc³aw and in Poznañ. At the site in Poznañ, adult individuals were relatively large, as their shell width ranged from 14.5 to 19.7 mm. It must be emphasised that adult individuals ofM. cartusiana with shell width of nearly 20 mm have not been reported so far. The new sites of this snail indicate that it has become a perma- nent component of the Polish fauna