Abstract / Introduction / Summary:
Echinorhynchid acanthocephalans, reported as Pseudoacanthocephalus cf. bufonis in this paper, were found in the small intestine of Polypedates leucomystax (Gravenhorst, 1829) (Rhacophoridae) on Okinawa-jima Island and Bufo gargarizans miyakonis Okada, 1931 (Bufonidae) on Miyako-jima Island, the Ryukyu Islands, southern Japan. This acanthocephalan species was previously reported as P. bufonis (Shipley, 1903) in Japan. The known anuran hosts and collection localities of P. cf. bufonis in the Ryukyu Islands are listed. A comment is also made on the previous identification of P. bufonis found in Hokkaido, northern Japan.