Gyrodactylus nigeri n. sp. (Monogenea: Gyrodactylidae) parasitic on Yunnanilus niger (Cypriniformes: Nemacheilidae) from Yunnan Province, Southwest China.

IF 2 3区医学 Q3 ECOLOGY International Journal for Parasitology-Parasites and Wildlife Pub Date : 2024-12-11 eCollection Date: 2025-04-01 DOI:10.1016/j.ijppaw.2024.101034

Le Zhou, Tao Chen

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Abstract

To investigate the infection of fish of the genus Yunnanilus by Gyrodactylus (Monogenea) parasites in the karst region of Yunnan (Southwest China), Gyrodactylus individuals were obtained from the rare and vulnerable host black loach Yunnanilus niger. Based on morphology and partial internal transcribed spacer (ITS) sequence data, we identified and described a new species Gyrodactylus nigeri n. sp. Obtained from the fins of Y. niger from Yunnan Province, Southwest China. Of all available gyrodactylid sequences, the ITS fragment obtained has the highest similarity (88.3%) to the same part of the rDNA of Gyrodactylus kobayashii. The prevalence and mean intensity were 100% and 11.9, respectively. The morphological comparison of the similar haptoral structures revealed slight differences between the new species and the five Gyrodactylus species found in the hosts of Nemacheilidae, and the marginal hooks were compared with the 18 Gyrodactylus species found in the hosts of Nemacheilidae. In particular, G. nigeri n. sp. has robust, long, and straight hamuli with inclined roots, the lingulate ventral bar membrane, a short marginal sickle with a blunt marginal hook toe of marginal hooks, and an oval male copulatory organ (MCO). Gyrodactylus nigeri n. sp. is the first Gyrodactylus species isolated from Y. niger. Furthermore, phylogenetic analyses showed that the new species is a new member of the subgenus G. (Limnonephrotus).

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云南省黑云母蝇（鲤形目：黑云母蝇科）上的寄生蜂（单属：黑云母蝇科）

为调查云南喀斯特地区单系Gyrodactylus （Monogenea）寄生虫对Yunnanilus属鱼类的感染情况，从稀有易感宿主黑泥鳅Yunnanilus niger身上采集了Gyrodactylus个体。基于形态学和部分内部转录间隔（ITS）序列数据，对云南黑鳍Gyrodactylus nigi n. sp.进行了鉴定和描述。所有可用gyrodactylid序列,其片段得到相似度最高(88.3%),其中kobayashii rDNA的一部分一样。患病率为100%，平均强度为11.9%。对相似的掌部结构进行了形态学比较，发现新种与在线虫科寄主中发现的5种旋毛虫略有差异，并将边缘钩与在线虫科寄主中发现的18种旋毛虫进行了比较。特别地，尼日尔氏线虫有粗壮的、长而直的、根倾斜的钩柄，舌状的腹棒膜，短的边缘镰刀，边缘钩的钝的边缘钩趾，和一个椭圆形的雄性交配器官（MCO）。尼日尔回肠虫（Gyrodactylus nigi n. sp.）是从尼日尔伊蚊中分离到的第一个回肠虫种。系统发育分析结果表明，该新种是属Limnonephrotus亚属的新成员。

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来源期刊

International Journal for Parasitology-Parasites and Wildlife Medicine-Infectious Diseases

CiteScore

3.80

自引率

5.60%

发文量

113

审稿时长

45 days

期刊介绍： The International Journal for Parasitology: Parasites and Wildlife (IJP-PAW) publishes the results of original research on parasites of all wildlife, invertebrate and vertebrate. This includes free-ranging, wild populations, as well as captive wildlife, semi-domesticated species (e.g. reindeer) and farmed populations of recently domesticated or wild-captured species (e.g. cultured fishes). Articles on all aspects of wildlife parasitology are welcomed including taxonomy, biodiversity and distribution, ecology and epidemiology, population biology and host-parasite relationships. The impact of parasites on the health and conservation of wildlife is seen as an important area covered by the journal especially the potential role of environmental factors, for example climate. Also important to the journal is ''one health'' and the nature of interactions between wildlife, people and domestic animals, including disease emergence and zoonoses.