 Lymnaeids serve as intermediate hosts of at least 71 trematode species distributed among 13 families, including some species of Schistosomatidae and Echinostomatidae, with implications for human health, and "Paramphistomum daubneyi", which is of veterinary interest.The most emblematic case of parasite transmitted by lymnaeids is "Fasciola hepatica" (Digenea