宿主 Host

イトウ Parahucho perryi (Brevoort, 1856)  [5] (as Hucho perryi [1–4])．

寄生部位 Site of infection

鰓・鰓弁 Gill, gill filaments [1–5]

産地 Localities

釧路川水系及び/又は別寒辺牛川水系 Kushiro R. sys. and/or Bekanbeushi R. sys. [1, 2]，小樽港水族館 Otaru Aquarium [3]，さけます・内水面水産試験場（恵庭市）Salmon and Freshwater Fisheries Research Institute (Eniwa City) [3, 5]，釧路川水系 Kushiro R. sys. [4]，鶴居村 Tsurui Vil. [5]（北海道 Hokkaido）．

環境 Environment

淡水 freshwater．

異名 Synonymised name

Microcotylid monogenetic trematodes [1].

Microcotylidae gen. sp. [2].

Discocotyle sp. [3, 4]．

文献 References

[1] Shimazu, T. (1981). Some digenetic trematodes of freshwater fishes from eastern Hokkaido. Journal of Nagano-ken Junior College 36: 13–36. 

[2] Nagasawa, K., Urawa, S.,  and Awakura, T. (1987). A checklist and bibliography of parasites of salmonids of Japan. Scientific Reports of the Hokkaido Fish Hatchery 41: 1–75.

[3] 奥祐三郎・Playford, M. C.・坂下満明・籠島賢二  (1990). 水族館で大量斃死したイトウの鰓に見られた Discocotyle sp. について.  寄生虫学雑誌 40(補：第60回日本寄生虫学会大会特集): 121. (Oku, Y., Playford, M. C., Sakashita  M., and Kagoshima, K. (1991). Discocotyle sp. and the mass death of huchens in an aquarium. Japanese Journal of Parasitology 40 (suppl.): 121. [In Japanese with English title])

[4] Ogawa, K. (1994b). Monogenean parasites of freshwater fishes of Hokkaido, Japan. Scientific Reports of the Hokkaido Fish Hatchery 48: 59–67.

[5] Ogawa, K., Shirakashi, S., Sata, N., Itoh, N., Ito, S., Lewisch, E., and Bornstein, S. (2024). Description of Discocotyle ciray n. sp. (Monogenea: Discocotylidae) from Parahucho perryi (Brevoort) from Hokkaido, Japan, with a redescription of D. sagittata (Leuckart, 1842). Systematic Parasitology, 101(2): 10.1007/s11230-023-10146-9.