Nitta Masato, Nagasawa Kazuya
Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan.
Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8528, Japan.
Syst Parasitol. 2020 Apr;97(2):193-200. doi: 10.1007/s11230-020-09905-9. Epub 2020 Feb 17.
Gobioecetes longibasis n. sp. (Monogenea: Dactylogyridae) from the gills of the freshwater goby Rhinogobius similis Gill (Perciformes: Gobiidae) in the River Teima, Okinawa-jima Island, the Ryukyu Archipelago, southern Japan, is described. The new species is distinguished from two congeneric species of Gobioecetes Ogawa & Itoh, 2017, G. rhinogobius (Ling, 1973) and G. biwaensis Ogawa & Itoh, 2017, by having longer ventral hamuli, longer and wider internal process of the dorsal hamuli, and the ratio of dorsal hamulus length to base length. This new species is host-specific to R. similis and considered to be endemic to Okinawa-jima Island or the Ryukyu Archipelago. We also report Rhinogobius sp. OM from a tributary of Lake Biwa, Shiga Prefecture, central Japan, as a new host of G. biwaensis.
描述了采自日本南部琉球群岛冲绳岛照间川淡水虾虎鱼（鲈形目：虾虎鱼科）鳃上的长基虾虎鱼单殖吸虫新种（单殖吸虫纲：指环虫科）。该新物种与2017年小川和伊藤描述的虾虎鱼单殖吸虫属的两个同属物种，即虾虎鱼单殖吸虫（凌，1973年）和琵琶湖虾虎鱼单殖吸虫（小川和伊藤，2017年）不同，其腹钩较长，背钩内突更长更宽，且背钩长度与基部长度之比不同。该新物种是虾虎鱼的宿主特异性物种，被认为是冲绳岛或琉球群岛特有的。我们还报告了日本中部滋贺县琵琶湖一条支流中的虾虎鱼属OM种，作为琵琶湖虾虎鱼单殖吸虫的新宿主。
