Integrative evidence reveals a new species of Hysterothylacium (Nematoda: Ascaridoidea), with the characterization of its complete mitochondrial genome

IF 2 3区医学 Q3 ECOLOGY

International Journal for Parasitology-Parasites and Wildlife Pub Date : 2025-02-02 DOI:10.1016/j.ijppaw.2025.101042

Hui-Xia Chen , Hai-Xia Qiao , Wen-Ting Zhao , Xiao-Hong Gu , Liang Li

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Abstract

The genus Hysterothylacium (Ascaridida: Raphidascarididae) is among the commonest groups of parasitic nematodes occurring in the digestive tract of marine fishes. In the present study, a new species of Hysterothylacium, H. hainanense sp. n. collected from Uranoscopus tosae (Jordan & Hubbs) and U. japonicus Houttuyn (Perciformes: Uranoscopidae) in the Chinese waters was described using integrative methods, including light and scanning electron microscopy, and ASAP and BI analyses based on the ITS sequence data. The complete mitochondrial genome of the new species was sequenced and annotated, which represents the first mitogenomic data for the genus Hysterothylacium, and also for the family Raphidascarididae. The mitogenome of H. hainanense sp. n. is 14059 bp in length, including 12 protein coding genes (missing atp8), 22 tRNA genes, 2 rRNA genes and 2 non-coding regions, which has 67.0% of overall A + T content, and represents the lowest level of A + T content in the ascaridoid mitogenomes reported so far. Molecular phylogenetic results suggested a close affinity between H. hainanense sp. n. and H. fabri in the genus Hysterothylacium.

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综合证据揭示了一种新的子宫囊虫（线虫纲：蛔虫总科），并鉴定了其完整的线粒体基因组

宫丝虫属（蛔虫纲：蛔虫科）是发生在海洋鱼类消化道中最常见的寄生线虫群之一。本文报道了一种来自约旦的海蝇属（Uranoscopus tosae）海蝇属（H. hainanense sp. n.）。基于ITS序列数据，采用光镜、扫描电镜、ASAP和BI分析等综合方法对中国海域的U. japonicus Houttuyn（尾形目：尾形目）和U. japonicus Houttuyn进行了描述。对该新种的线粒体全基因组进行了测序和注释，这是该新种的第一个线粒体基因组数据，也是Raphidascarididae科的有丝分裂数据。海南血吸虫丝裂基因组全长14059 bp，包括12个蛋白编码基因（缺失atp8）、22个tRNA基因、2个rRNA基因和2个非编码区，占总A + T含量的67.0%，是目前报道的蛔虫丝裂基因组中A + T含量最低的。分子系统发育结果表明，海南水蛭与宫藻属水蛭具有较近的亲缘关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.