Abstract / Introduction / Summary:
Specimens of a species of the genus Temno- sewellia Damborenea and Cannon (Temnocephalida: Temnocephalidae) were collected from the exoskeleton of two species of freshwater crabs, Geothelphusa exigua Suzuki and Tsuda (Decapoda: Potamidae) and Eriocheir japonica (De Haan) (Decapoda: Varunidae) in the head waters and upper streams of some rivers in the Ohsumi Peninsula, Kagoshima Prefecture, southern Japan. Individuals of this temnocephalid were found to transfer from G. exigua to E. japonica in an experi- mental tank.
