摘要：Abstract We examined the structure of the black spots on the ventral surface of Rana ridibunda specimens, which were collected from the west Anatolia region of Turkey, and a multi-cellular parasite was discovered under these spots on the dermis within a cyst. The number of melanocytes had increased and the connective tissue of the dermis had surrounded the cyst. The parasite was a trematode in its metacercarial stage.
