Prima segnalazione di Misgurnus anguillicaudatus (Cantor, 1842) in acque interne italiane

First record of Misgurnus anguillicaudatus (Cantor, 1842) in Italian inland watercourses. (Osteichthyes: Cobitidae). The authors report the presence of Misgurnus anguillicaudatus in some watercourses of the province of Pavia (north Italy). The species was formerly distributed in the Far East: from the Tugur (China, C.I.S.) to the Irrawaddi (Myanmar) catchment area, it has been already introduced in the United States, Mexico, Palau, Australia and Germany. Various hypotheses are presented in order to explain the presence of Misgurnus anguillicaudatus in Italy.