Paospora carinifang n. gen., n. sp. (Microsporidia: Spragueidae), a parasite of the ridgetail white prawn, Palaemon carinicauda

IF 3.6 3区 生物学 Q1 ZOOLOGY Journal of invertebrate pathology Pub Date : 2024-08-16 DOI:10.1016/j.jip.2024.108180
Yuan Wang, Ying Na, Yan-qing Huang, Jun-fang Zhou, Shou-hu Li, Quan-lin Liu, Le-tian Li, Yuan-ge Chen, Wei Tian, Hai Chi, Xin-cang Li, Wen-hong Fang
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Abstract

A new microsporidian disease of the pond-reared ridgetail white prawn, Palaemon carinicauda, was found in China. Light microscopy, pathology, and scanning electron microscopy showed that the parasite infected the host’s skeletal muscle tissue and formed spherical sporophorous vesicles (SPOVs). Electron microscopy revealed that its merogonic life stages developed in direct contact with the host cytoplasm. The sporogonic life stages underwent octosporoblastic sporogony with the formation of eight uninucleate spores in each SPOV. Fresh SPOVs were 5.4 ± 0.55 µm in diameter. The octospores were oval and measured 2.3 × 1.5 μm (fresh) and 1.96 × 1.17 μm (fixed). The isofilar polar filament was coiled with 9–10 turns and arranged in two rows. Phylogenetic analysis based on the SSU rRNA gene suggests that this microsporidium has close affinities with members of the genera Potaspora and Apotaspora, but represents an independent generic taxon. We therefore propose the establishment of a new genus and species (Paospora carinifang n. gen., n. sp.) within the family Spragueidae. We also propose a taxonomic revision to transfer Potaspora macrobrachium to this new genus and reclassify it as Paospora macrobrachium comb. nov.

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Paospora carinifang n. gen., n. sp. (microsporidia: Spragueidae), a parasite of the ridgetail white prawn, Palaemon carinicauda.
中国发现了一种池塘饲养的脊尾白对虾(Palaemon carinicauda)新的微孢子虫病。光镜、病理和扫描电镜显示,寄生虫感染了宿主的骨骼肌组织,并形成球形孢子囊(SPOVs)。电子显微镜显示,它的合子生命阶段是在与宿主细胞质直接接触的情况下发育的。孢子体生命阶段经历了八孢子化孢子过程,每个 SPOV 中形成八个无核孢子。新鲜孢子的直径为 5.4 ± 0.55 µm。八孢子呈椭圆形,大小为 2.3 × 1.5 μm(新鲜)和 1.96 × 1.17 μm(固定)。等翅极丝盘绕 9-10 圈,排成两行。基于 SSU rRNA 基因的系统发育分析表明,这种微孢子虫与 Potaspora 属和 Apotaspora 属的成员有密切的亲缘关系,但代表了一个独立的属类群。因此,我们建议在 Spragueidae 科中建立一个新属和新种(Paospora carinifang n. gen.我们还建议进行分类学修订,将 Potaspora macrobrachium 转入这一新属,并将其重新分类为 Paospora macrobrachium comb.
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来源期刊
CiteScore
6.10
自引率
5.90%
发文量
94
审稿时长
1 months
期刊介绍: The Journal of Invertebrate Pathology presents original research articles and notes on the induction and pathogenesis of diseases of invertebrates, including the suppression of diseases in beneficial species, and the use of diseases in controlling undesirable species. In addition, the journal publishes the results of physiological, morphological, genetic, immunological and ecological studies as related to the etiologic agents of diseases of invertebrates. The Journal of Invertebrate Pathology is the adopted journal of the Society for Invertebrate Pathology, and is available to SIP members at a special reduced price.
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