New records of an alien digenean Glypthelmins quieta (Plagiorchiidae) infecting the American bullfrog, Lithobates catesbeianus, in western Japan

An alien plagiorchiid digenean, G(vpthe/mins quieta (Stafford, 1900), is newly reported from the American bullfrog, Lithobates catesbeianus (Shaw, 1802), in Hiroshima Prefecture (western Honshu) and Saga Prefecture (northern Kyushu), western Japan. In Japan, this digenean has been found previously only from Saitama, Ibaraki, and Chiba prefectures, central Honshu. Thus, the present collections represent its new prefectural records and extend its geographical distribution westward to northern Kyushu. The digenean may have a similar distribution pattern as its first intermediate gastropod host in central-western to southern Japan