DOI: https://doi.org/10.2478/v10058-012-0029-6
The paper presents the description of Cathaemasia hians Rudolphi, 1809 trematode found on the territory of Ukraine in an intermediate host, fresh-water molluscs Planorbis planorbis. We present also a comparison of metrical characters of the studied C. hians cercariae and those described by other researchers.