A fish parasite, Isoparorchis eurytremum (Digenea: Isoparorchiidae), newly recorded in Tokushima Prefecture, Shikoku, Japan

An immature specimen of the isoparorchiid digenean Isoparorchis eurytremum (Kobayashi, 1915) was collected from the mesentery of a dark sleeper, Odontobutis obscura (Temminck & Schlegel, 1845), in an irrigation canal, Tokushima City, Tokushima Prefecture, Shikoku, the fourth largest island of Japan. This represents a new prefectural record for I. eurytremum and the third record of the species in Shikoku