Taxonomic name: Diorchis druzniensis (Cestodes)Life Cycle Stage: AdultInteraction Type: is parasite ofInteraction Record Type: natural Jarecka L., 1958. Plankton crustaceans in the life cycle of tapeworms occurring at Druzno Lake. Acta Parasitologica Polonica, 6: 65-109 Taxonomic name: Larus fuscus