Description of Discocotyle ciray n. sp. (Monogenea: Discocotylidae) from Parahucho perryi (Brevoort) from Hokkaido, Japan, with a redescription of D. sagittata (Leuckart, 1842).
{"title":"Description of Discocotyle ciray n. sp. (Monogenea: Discocotylidae) from Parahucho perryi (Brevoort) from Hokkaido, Japan, with a redescription of D. sagittata (Leuckart, 1842).","authors":"Kazuo Ogawa, Sho Shirakashi, Naoya Sata, Naoki Itoh, Shingo Ito, Eva Lewisch, Stephanie Bornstein","doi":"10.1007/s11230-023-10146-9","DOIUrl":null,"url":null,"abstract":"<p><p>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.</p>","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"101 2","pages":"24"},"PeriodicalIF":1.0000,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Systematic Parasitology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s11230-023-10146-9","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PARASITOLOGY","Score":null,"Total":0}
引用次数: 0
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.
Description of Discocotyle ciray n. sp. (Monogenea: Discocotylidae) from Parahucho perryi (Brevoort) from Hokkaido, Japan, with a redescription of D. sagittata (Leuckart, 1842).
Discocotyle sagittata (Leuckart, 1842) (Monogenea: Discocotylidae) 被重新描述，基于从模式宿主 Salmo trutta Linnaeus 采集的标本，标本采集自模式产地德国弗莱堡，并以 S. trutta 和在奥地利水族馆饲养的虹鳟 Oncorhynchus mykiss (Walbaum) 的标本作为补充。对 Discocotyle Diesing, 1850 属的诊断进行了修正。Discocotyle ciray n. sp.是根据日本北海道惠庭（Eniwa）的鲑鱼 Parahucho perryi (Brevoort) 的未成年、成年和成年标本描述的。该新物种的成体标本比从 S. trutta 鲑鱼身上采集的 D. sagittata 大一倍左右。当 D. ciray n. sp.的模式标本与北海道鹤井 P. perryi 的博物馆标本一起进行检验时，其体型和夹钳大小与寄主大小呈正相关。其在鹤井较小的 P. perryi 上的测量结果与 D. sagittata 的测量结果重叠，表明这些尺寸差异并不是合适的区分关键。Discocotyle ciray n. sp.与 D. sagittata 的区别在于雌性生殖系统的形态（相对靠前的卵巢、短的联合阴道导管和缠绕性更强的子宫）。ciray n. sp.与 D. sagittata 的 COI mtDNA 序列遗传距离为 18.0-18.6%。这些明显的遗传差异也支持了 D. ciray n. sp.
期刊介绍：
Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
