[Acroloxus lacustris (fam. Ancylidae) as a new intermediate trematode host in the USSR]

585 specimens of the mollusk Acroloxus lacustris were parasitologically investigated in the Divichin Bay of the Caspian Sea. 3 species of cercarians (Echinostoma sp., Echinoparyphium recurvatum, Asymphylodora sp.), 2 species of parthenites (Echinostomatidae gen. sp. Redia I, Echinostomatidae gen. sp. Redia II) and 4 species of metacercarians (Metacercaria gen. sp. I, Metacercaria gen. sp. II. Metacercaria gen. sp. III, Tetracotyle sp.) were found in the specimens examined. A. lacustris is first reported as an intermediate host of trematodes.