2016 年 21 巻 1 号 p. 1-7
Three species of monogenean, Dactylogyrus squameus Gussev, 1955, Ancyrocephalus pseudorasborae Achmerow, 1952, and Bivaginogyrus obscurus (Gussev, 1955), were collected from the gills of the cyprinid Pseudorasbora parva (Temminck and Schlegel, 1846) in Japan. Dactylogyrus squameus and A. pseudorasborae were collected in Nara, Tottori, and Ibaraki prefectures, and in Ibaraki and Okayama prefectures, respectively, and are redescribed as new country records from Japan. Bivaginogyrus obscurus has been reported from only Ibaraki and Nagano prefectures, and its discovery in Nara and Okayama prefectures as represents as new locality records. Although D. squameus and B. obscurus are known as alien parasites in Europe, all three monogeneans found in this study are considered to be native to Japan.
