EN
The morphology and chaetotaxy of the rediae and the cercariae of Isthmiophora melis are described and compared with other echinostomatids and related groups of trematodes. Apart from adult morphology of I. melis, which is typical of Echinostomatidae, the structure of the redia and chaetotaxy pattern of the cercaria are the most similar to those observed in an echinostomatid genus Paryphostomum as well as in representatives of the family Cathaemasiidae, especially in Cathaemasia hians.