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有毒甲藻墨西哥原甲藻和拉氏原甲藻的同义关系及新种斯氏原甲藻的描述(原甲藻目,甲藻纲)

The Synonymy of the Toxic Dinoflagellates Prorocentrum mexicanum and P. rhathymum and the Description of P. steidingerae sp. nov. (Prorocentrales, Dinophyceae).

作者信息

Gómez Fernando, Qiu Dajun, Lin Senjie

机构信息

Carmen Campos Panisse 3, Puerto de Santa María, E-11500, Spain.

CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Science, 164 West Xingang Road, Guangzhou, 510301, China.

出版信息

J Eukaryot Microbiol. 2017 Sep;64(5):668-677. doi: 10.1111/jeu.12403. Epub 2017 Mar 10.

Abstract

Prorocentrum mexicanum and P. rhathymum are toxicologically important dinoflagellates, but their relationship is not well defined. We investigated strains from Puerto Rico and Brazil by light and scanning electron microscopies. We provide molecular data from a strain isolated near the type locality of P. rhathymum, and the first morphological and molecular data from the South Atlantic Ocean. The rRNA gene (rDNA) sequences of the Puerto Rican and Brazilian strains were identical, and their morphologies fit the description of P. rhathymum. In the molecular phylogenies, the globally distributed populations under the names P. mexicanum and P. rhathymum are intermixed and branched together, except for several divergent strains from Florida and Cuba. We examined the original descriptions and iconotypes of the species Prorocentrum maximum, P. brochii, P. mexicanum, and P. rhathymum. We conclude that P. maximum sensu Schiller's figure 41a corresponds to the earlier description of this species; the split of P. mexicanum and P. rhathymum was based on a misidentification because P. mexicanum sensu Cortés-Altamirano & Sierra-Beltrán corresponds to P. texanum var. cuspidatum; and P. rhathymum is a junior synonym of P. mexicanum. Several Floridian and Cuban strains correspond to a new species, which we describe as Prorocentrum steidingerae sp. nov.

摘要

墨西哥原甲藻和拉氏原甲藻是毒理学上重要的甲藻,但它们之间的关系尚未明确界定。我们通过光学显微镜和扫描电子显微镜对来自波多黎各和巴西的菌株进行了研究。我们提供了从拉氏原甲藻模式产地附近分离出的一个菌株的分子数据,以及来自南大西洋的首批形态学和分子数据。波多黎各和巴西菌株的rRNA基因(rDNA)序列相同,其形态符合拉氏原甲藻的描述。在分子系统发育中,全球分布的以墨西哥原甲藻和拉氏原甲藻命名的种群相互混合并一起分支,除了来自佛罗里达和古巴的几个不同菌株。我们检查了极大原甲藻、布氏原甲藻、墨西哥原甲藻和拉氏原甲藻的原始描述和模式标本。我们得出结论,席勒图41a中的极大原甲藻对应于该物种的早期描述;墨西哥原甲藻和拉氏原甲藻的划分基于错误鉴定,因为科尔特斯 - 阿尔塔米拉诺和塞拉 - 贝尔特兰所描述的墨西哥原甲藻对应于德克萨斯原甲藻尖突变种;拉氏原甲藻是墨西哥原甲藻的次异名。几个佛罗里达和古巴菌株对应于一个新物种,我们将其描述为新种斯氏原甲藻。

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