Notes on new or rare taxa of Crustaceans and Molluscs from a “fontanile” in Arzago d'Adda, Bergamo, Italy (Crustacea, Mollusca)

The present work is a continuation of previous researches and censuses carried out by the Author, reports onItalian biotopes characterized by typical fauna inhabiting springs and other fluvial (or freshwater). During thelast decades, many of these areas were severely altered and/or even obviated; nevertheless, at the same time,new stations harbouring a rich biodiversity were discovered. This paper provides data on ecology and faunacomposition of some “fontanili” of Lombardia Region, (Italy), focusing on new or rare taxa of molluscs andcrustaceans found in a “fontanile” of Arzago d'Adda (Bergamo).