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Description of Discocotyle ciray n. sp. (Monogenea: Discocotylidae) from Parahucho perryi (Brevoort) from Hokkaido, Japan, with a redescription of D. sagittata (Leuckart, 1842)
Ogawa, K.; Shirakashi, S.; Sata, N.; Itoh, N.; Ito, S.; Lewisch, E.; 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). Syst. Parasitol. 101(2): 24. https://dx.doi.org/10.1007/s11230-023-10146-9
In: Systematic Parasitology. Kluwer: The Hague; Dordrecht. ISSN 0165-5752; e-ISSN 1573-5192
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Taxa > Species > New taxa > New species
Discocotyle sagittata (Leuckart, 1842) Diesing, 1850 [WoRMS]; Parahucho perryi (Brevoort, 1856) [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- Ogawa, K.
- Shirakashi, S.
- Sata, N.
- Itoh, N.
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- Ito, S.
- Lewisch, E.
- Bornstein, S.
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| Abstract |
Discocotyle sagittata (Leuckart, 1842) (Monogenea: Discocotylidae) is redescribed, based on specimens collected from the type host, Salmo trutta Linnaeus, from the type locality, Freiburg, Germany, supplemented with specimens from S. trutta and rainbow trout, Oncorhynchus mykiss (Walbaum) reared in an Austrian aquarium. The diagnosis of the genus Discocotyle Diesing, 1850 is emended. Discocotyle ciray n. sp. is described, based on immature, preadult and adult specimens from the salmonid, Parahucho perryi (Brevoort) at Eniwa, Hokkaido, Japan. Adult specimens of the new species were about twice as large as those of D. sagittata from S. trutta. When the type specimens of D. ciray n. sp. were examined together with museum specimens from P. perryi at Tsurui, Hokkaido, the body and clamp sizes were positively correlated to the host size. Their measurements from a smaller P. perryi at Tsurui overlapped with those of D. sagittata, showing that these size differences were not suitable differentiating keys. Discocotyle ciray n. sp. can be separated from D. sagittata by the morphologies of the female genital system (relatively anteriorly positioned ovary, short joint vaginal duct and much more strongly winding uterus). The genetic distances of COI mtDNA sequence between D. ciray n. sp. and D. sagittata were 18.0–18.6%. These remarkable genetic divergences also supported the distinct taxonomic status of D. ciray n. sp. |
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