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A new species of Glugea Th,lohan, 1891 in the red sea bream Pagrus major (Temminck & Schlegel) (Teleostei: Sparidae) from China

文献类型： 外文期刊

作者： Su, Youlu 1 ; Feng, Juan 1 ; Sun, Xiuxiu 2 ; Jiang, Jingzhe 1 ; Guo, Zhixun 3 ; Ye, Lingtong 1 ; Xu, Liwen 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab South China Sea Fishery Resources Exploit, Minist Agr, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China

2.Guangdong Prov Aquat Anim Epidem Dis Prevent & Co, Guangzhou 510222, Guangdong, Peoples R China

3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr

期刊名称：SYSTEMATIC PARASITOLOGY （ 影响因子：1.431； 五年影响因子：1.311 ）

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收录情况： SCI

摘要： A new microsporidian species is described from farmed red sea bream Pagrus major (Temminck & Schlegel) (Teleostei: Sparidae). Large numbers of spherical whitish xenomas were observed throughout the visceral organs of the host. Histological examination showed that the microsporidia caused several xenomas that were embedded in the intestinal muscularis externa or submucosa. Light and transmission electron microscopy examination of the spores also revealed morphological features typical of species of Glugea Th,lohan, 1891. This microsporidian parasite has two different types of mature spores: microspores and macrospores. The spores are elongate-ovoid, with a large posterior vacuole. The polaroplast is bi-partite, with anterior and posterior parts comprising densely packed lamellae and loose membranes, respectively, and occupies approximately the anterior half of the spore. The polar filament is anisofilar, with 12-13 coils in a single layer almost touching the posterior spore wall. Comparison of the small subunit rDNA sequences revealed 92.7-98.1% identity with the sequences available from other Glugea spp. from piscine hosts. Phylogenetic analysis demonstrated that the microsporidian species studied clustered within the Glugea clade with strong support. Based on the differences in the morphological characteristics and molecular data, the microsporidian infecting P. major is considered to represent a species new to science, Glugea pagri n. sp

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