[Larval stages of digenetic trematodes in Chilina sp. (Mollusca, Pulmonata) of some water bodies of Patagonia, Argentina].

Chilina sp., found abundantly in Patagonian fresh water bodies, is an intermediate host in the biological cycles of several digenetic trematodes. Larvae at different developmental stages were found in the visceral mass of snails collected from several places, and were determinated to family level. This work shows these findings, with presence and prevalence data, and so attempts to contribute to increase the parasitological knowledge about studied water bodies.