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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2016 Vol.35 No.3

Redescription of Myxidium cuneiforme Fujita, 1924 (Myxosporea: Bivalvulida) and Molecular Phylogeny with its Relative Species
Author of the article:LI Chao, SUO Dong, YANG Chengzhong*, ZHAO Yuanjun
Author's Workplace:Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
Key Words:Myxidium cuneiforme; relative species; 18S rDNA; molecular phylogeny
Abstract:The species identification between Myxidium and Zschokklella is difficult due to their similar morphology and vague boundaries. To clarify the taxonomic relationship of the two genera, the morphology of Myxidium cuneiforme Fujita, 1924 collected from the Fujiang River in Tongnan county, Chongqing, China was redescribed. Subsequently, molecular phylogeny was analyzed along with the relative species. The mature spore of M. cuneiforme was elongated in valvular view with the middle part concaved slightly. The surface of each valve had 6~8 longitudinal grooves. The suture line was straight, and spore was fusiform in sutural view. The spore was 12.5 μm±0.3 μm long and 5.4 μm±0.3 μm wide (n=20), each with two polar capsules posited at the both end of the spore. The two polar capsules were pyriform with equal size of 4.3 μm±0.2 μm long and 3.1 μm±0.2 μm wide (n=20), containing polar filaments coiled 5~6 turns. Analyses of the variation of conserved regions, genetic distances, sequence similarities and molecular phylogeny based on 18S rDNA sequences indicated that, Myxidium and Zschokkella were not monophyletic, as they clustered together with each other in the phylogenetic analysis. Therefore, Myxidium and Zschokkella had a very close genetic relationship. The results from the morphological and molecular data supported the proposal that Myxidium and Zschokkella should be assigned to one single genus.
2016,(35): 384-390 收稿日期:2015-11-06
DOI:10.11984/j.issn.1000-7083.20150350
分类号:Q959.115
基金项目:国家自然科学基金项目(No.31471980,No.31501845);重庆市科委基金项目(No.cstc2014jcyjA80014);重庆市教委科技项目(KJ1400502)
作者简介:李超(1989-),男,硕士研究生,研究方向为寄生虫进化生态学,E-mail:1027276898@qq.com
*通讯作者:杨承忠,E-mail:drczyang@126.com
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