非洲首次报告的 Azygiid 或一种胭脂鱼：Plenivitellinum kifi n. gen., n. sp. (Digenea: Azygiidae) Infecting the Gut of African Tigerfish, Hydrocynus vittatus Castelnau, 1861 (Characiformes: Alestidae) from the Kavango River.
Triet Nhat Truong, Haley Rebecca Dutton, Edward Charles Netherlands, Louis Heyns DuPreez, Francois Jakob Jacobs, Stephen Ashton Bullard
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We revise the diagnosis of Azygiidae Lühe, 1909 to accommodate this new species.</p><h3>Methods</h3><p>The worm was heat-killed, fixed in 10% neutral buffered formalin, stained in Van Cleave’s and Ehrlich’s hematoxylins, cleared in clove oil, and mounted on glass slide using Canada balsam.</p><h3>Results</h3><p>The new azygiid resembles species of <i>Otodistomum</i> Stafford, 1904 by having an elongate body, a ventral sucker that is wider than the oral sucker and that is in the anterior half of the body, a pre-testicular ovary, a uterus that primarily occupies the inter-caecal space between the ovary and the ventral sucker, and a vitellarium that is restricted to the hindbody and that is confluent posteriorly in the post-testicular region. The new genus differs from all species of Azygiidae by having the combination of a ventral sucker that is wider than the oral sucker (vs. narrower), an elongate prostatic sac that extends posteriad to near the posterior margin of the ventral sucker (vs. an ovoid prostatic sac that is wholly anterior to or slightly overlaps the anterior margin of the ventral sucker), a vitellarium that nearly fills the post-testicular space and that extends posteriad beyond the caecal tips (vs. a vitellarium that is separate posteriorly or that is restricted to the anterior half of the post-testicular space and does not extend posteriad beyond the caecal tips), and an I-shaped excretory bladder (vs. Y-shaped).</p><h3>Conclusion</h3><p>This study documents the first record of an azygiid from Africa and the first record of an azygiid infecting a characiform fish.</p></div>","PeriodicalId":6932,"journal":{"name":"Acta Parasitologica","volume":"69 3","pages":"1403 - 1410"},"PeriodicalIF":1.2000,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11686-024-00872-5.pdf","citationCount":"0","resultStr":"{\"title\":\"First Azygiid Reported from Africa or a Characiform Fish: Plenivitellinum kifi n. gen., n. sp. 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引用次数: 0
摘要
目的：本文旨在描述纳米比亚卡万戈河中感染非洲虎鱼Hydrocynus vittatus Castelnau, 1861 (Characiformes: Alestidae) 胃肠道的Plenivitellinum kifi n. gen.我们修订了 Azygiidae Lühe, 1909 的诊断，以适应这一新物种：方法：将蠕虫加热杀死，用 10%的中性缓冲福尔马林固定，用 Van Cleave 和 Ehrlich 的苏木精染色，用丁香油清洗，并用加拿大香脂将其安装在玻璃载玻片上：结果：该新属与 Otodistomum Stafford, 1904 的物种相似，具有细长的身体、比口吸盘宽且位于身体前半部的腹吸盘、睾丸前卵巢、主要占据卵巢与腹吸盘之间的盲肠间隙的子宫，以及局限于后躯并在睾丸后部汇合的玻璃体。该新属与 Azygiidae 的所有种都不同，其腹面吸盘比口腔吸盘宽（而口腔吸盘较窄），前列腺囊细长，向后延伸至腹面吸盘后缘附近（而前列腺囊呈卵圆形，向后延伸至腹面吸盘后缘附近）。卵圆形前列腺囊完全位于腹吸盘前缘或与腹吸盘前缘略有重叠），卵黄囊几乎填满睾丸后间隙并向后延伸至盲肠尖以外（与卵黄囊向后分离或仅限于睾丸后间隙的前半部分且不向后延伸至盲肠尖以外），以及 I 形排泄膀胱（与 Y 形排泄膀胱）：本研究首次记录了非洲的颧骨鱼，也首次记录了颧骨鱼感染翘嘴鱼的情况。
First Azygiid Reported from Africa or a Characiform Fish: Plenivitellinum kifi n. gen., n. sp. (Digenea: Azygiidae) Infecting the Gut of African Tigerfish, Hydrocynus vittatus Castelnau, 1861 (Characiformes: Alestidae) from the Kavango River
Purpose
This paper aims to describe Plenivitellinum kifi n. gen., n. sp. (Digenea: Azygiidae) infecting the gastrointestinal tract of the African tigerfish, Hydrocynus vittatus Castelnau, 1861 (Characiformes: Alestidae) in the Kavango River, Namibia. We revise the diagnosis of Azygiidae Lühe, 1909 to accommodate this new species.
Methods
The worm was heat-killed, fixed in 10% neutral buffered formalin, stained in Van Cleave’s and Ehrlich’s hematoxylins, cleared in clove oil, and mounted on glass slide using Canada balsam.
Results
The new azygiid resembles species of Otodistomum Stafford, 1904 by having an elongate body, a ventral sucker that is wider than the oral sucker and that is in the anterior half of the body, a pre-testicular ovary, a uterus that primarily occupies the inter-caecal space between the ovary and the ventral sucker, and a vitellarium that is restricted to the hindbody and that is confluent posteriorly in the post-testicular region. The new genus differs from all species of Azygiidae by having the combination of a ventral sucker that is wider than the oral sucker (vs. narrower), an elongate prostatic sac that extends posteriad to near the posterior margin of the ventral sucker (vs. an ovoid prostatic sac that is wholly anterior to or slightly overlaps the anterior margin of the ventral sucker), a vitellarium that nearly fills the post-testicular space and that extends posteriad beyond the caecal tips (vs. a vitellarium that is separate posteriorly or that is restricted to the anterior half of the post-testicular space and does not extend posteriad beyond the caecal tips), and an I-shaped excretory bladder (vs. Y-shaped).
Conclusion
This study documents the first record of an azygiid from Africa and the first record of an azygiid infecting a characiform fish.
期刊介绍：
Acta Parasitologica is an international journal covering the latest advances in the subject.
Acta Parasitologica publishes original papers on all aspects of parasitology and host-parasite relationships, including the latest discoveries in biochemical and molecular biology of parasites, their physiology, morphology, taxonomy and ecology, as well as original research papers on immunology, pathology, and epidemiology of parasitic diseases in the context of medical, veterinary and biological sciences. The journal also publishes short research notes, invited review articles, book reviews.
The journal was founded in 1953 as "Acta Parasitologica Polonica" by the Polish Parasitological Society and since 1954 has been published by W. Stefanski Institute of Parasitology of the Polish Academy of Sciences in Warsaw. Since 1992 in has appeared as Acta Parasitologica in four issues per year.
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