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Identification of Gangesia oligonchis Roitman & Freze, 1964 (Cestoda: Onchoproteocephalidea) from Tachysurus fulvidraco Richardson in central China: implications for the validity of Gangesia pseudobagrae Chen, 1962

文献类型： 外文期刊

作者： Fu, Pei P. 1 ; Li, Wen X. 1 ; Zou, Hong 1 ; Zhang, Dong 1 ; Wu, Shan G. 1 ; Li, Ming 1 ; Wang, Gui T. 1 ; Xi, Bing W. 4 ;

作者机构： 1.Chinese Acad Sci, Key Lab Aquaculture Dis Control, Minist Agr, Wuhan 430072, Hubei, Peoples R China

2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

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

ISSN： 0165-5752

年卷期： 2019 年 96 卷 3 期

页码：

收录情况： SCI

摘要： Owing to the brief and incomplete original description of Gangesia pseudobagrae Chen, 1962 (Cestoda: Onchoproteocephalidea) and high morphological similarity to Gangesia oligonchis Roitman & Freze, 1964 parasitising the same host Tachysurus fulvidraco Richardson, the taxonomic validity of G. pseudobagrae in China remains questionable. Therefore, we sampled and identified specimens of Gangesia Woodland, 1924 from the intestine of T. fulvidraco from three lakes in central China. Morphologically, the sampled specimens almost perfectly corresponded both to G. oligonchis and the limited available description of G. pseudobagrae: rostellum-like organ armed with a single complete circle of hooks (24-31 in number); four uniloculate suckers covered with minute hooklets; genital pore irregularly alternated; testes medullary, spherical to oval; ovary medullary, bi-lobed, follicular; cirrus-sac thick-walled and long; uterus medullary. 28S rDNA sequence also exhibited the highest similarity to G. oligonchis (99.4-99.7%). Phylogenetic analysis showed that 11 individuals of Gangesia from the three lakes in China clustered with G. oligonchis from Russia (no sequence of G. pseudobagrae available on GenBank). Based upon the high similarity of morphology and high similarity of 28S rDNA sequences, the specimens of Gangesia from T. fulvidraco in central China were identified as G. oligonchis. Our results indicate that there is only one species of Gangesia in T. fulvidraco from the Palaearctic region, and thereby support the proposed synonymisation of G. pseudobagrae and G. oligonchis.

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