Melanoides tuberculatus (O.F.Muller, 1774) (Orthogastropoda: thiaridae), a gastropod species new for the fauna of Poland

Melanoides tuberculatus (O.F. Müll.), a gastropod species new for the fauna of Poland, was found in discharge canals of the P¹tnów and Konin power stations, situated in the Kujawy Lake District (Central Poland). The exotic gastropod, known in Europe mainly from aquaria and conservatory ponds, is the sixth invasive mollusc species recorded from heated waters of the Kujawy Lake District. The following alien mollusc species had been earlier identified in the area: bivalves Anodonta woodiana (Lea) and Dreissena polymorpha (Pall.), snails Potamopyrgus antipodarum (Gray), Menetus dilatatus (Gould), and Ferrissia wautieri (Mirolli).