Larval stages of digenetic trematodes of Pirenella conica from Deversoir Ismailia, Egypt.

Two cercariae are described from the prosobranch snail Pirenella conica collected from Deversoir marine-water, Ismailia, Egypt. One of the ercariae is prepleuro-lophoercous group, belonging to genus Stictodora, while the second is a Ephemera monostome cercaria. The latter is a new record for Pirenella conica snail in marine water from Ismailia.