Fauna malacològica de les Planes de Son i la Mata de València (Alt àneu, Pallars Sobirà, Pirineu Català): revisió bibliogràfica i noves dades

The survey of bibliograpic information on the presence of molluscs at the Planes de Son and Mata de València (municipality of Alt àneu, county of Pallars Sobirà, Catalan Pyrenees) has accounted for a list of 33 species of molluscs (seven of them are slugs) inhabiting historically this area. A current field survey (2006-2007) has detected 50 species of molluscs not slugs, two of these species are splitted in two subspecies. Detailed data from both faunistic inventories are provided.