Redescription of Taeniacanthus aulacocephali (Copepoda: Cyclopoida: Taeniacanthidae) parasitic on Uranoscopus japonicus Houttuyn (Uranoscopidae) from Pacific coast, Japan, with adaptation of the non-destructive DNA technique.

IF 1 4区医学 Q4 PARASITOLOGY Systematic Parasitology Pub Date : 2024-07-05 DOI:10.1007/s11230-024-10173-0

Masato Nitta

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Abstract

Taeniacanthus aulacocephali Izawa, 2021 (Copepoda: Cyclopoida: Taeniacanthidae) was redescribed from the branchial cavity and gill filaments of Uranoscopus japonicus Houttuyn (Perciformes: Uranoscopidae) collected from the Pacific coast of the Kochi and Wakayama prefectures, Japan. This is the second record of the copepod, and the finding from U. japonicus represents the new host record. The species is characterized by several distinguishing features: 1) a decrease in the width of the habitus between the second and fourth pedigerous segments; 2) the ratio of prosome/body length; 3) the presence of eight setae on the exopodal terminal segment of leg 2; 4) an un-bifurcated maxilliped claw surrounded by 14-28 transverse ridges; and 5) the presence of an inner coxal seta on legs 2 and 3. The newly collected specimens were subjected to a modified non-destructive DNA extraction method and morphological description based on the same copepod individual, while preserving a morphologically describable specimen. Sequences of 18S rDNA, 28S rDNA and the mitochondrial cytochrome c oxidase subunit 1 mitochondrial gene (cox1) were obtained.

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利用非破坏性 DNA 技术重新描述寄生于日本太平洋沿岸 Uranoscopus japonicus Houttuyn (Uranoscopidae) 的 Taeniacanthus aulacocephali (Copepoda: Cyclopoida: Taeniacanthidae)。

Taeniacanthus aulacocephali Izawa, 2021 (Copepoda: Cyclopoida: Taeniacanthidae) 从日本高知县和和歌山县太平洋沿岸采集的 Uranoscopus japonicus Houttuyn（鲈形目：Uranoscopidae）的支腔和鳃丝中被重新描述。这是该桡足类的第二个记录，而在日本桡足类中的发现代表了新的宿主记录。该物种有几个显著特征：1）第二和第四足节之间的习性宽度减小；2）前体/体长之比；3）腿 2 的外节末节上有 8 根刚毛；4）无分叉的上鳃瓣爪，周围有 14-28 条横向脊；5）腿 2 和腿 3 上有内跗节。对新采集的标本采用改良的无损 DNA 提取方法，并根据同一桡足类个体进行形态学描述，同时保留形态学上可描述的标本。获得了 18S rDNA、28S rDNA 和线粒体细胞色素 c 氧化酶亚单位 1 线粒体基因（cox1）的序列。

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来源期刊

Systematic Parasitology 医学-寄生虫学

CiteScore

2.20

自引率

23.10%

发文量

审稿时长

6-12 weeks

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.