A Putative Species Flock in the Diatom Genus Gomphonema Ehrenberg (Bacillariophyta: Gomphonemataceae) from Lake Baikal, Russia: Description of Six New Species Similar to G. ventricosum W. Gregory

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-08-01 DOI:10.7872/crya/v39.iss3.2018.365

J. Kociolek, M. Kulikovskiy, I. Kuznetsova, A. Glushchenko, C. Solak

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引用次数: 5

Abstract

Abstract We describe as new to science six new species of the diatom genus Gomphonema Ehrenberg from Lake Baikal, based on light and scanning electron microscope observations. The six species are morphologically similar to G. ventricosum, a northern European taxon known mostly from Scotland, Scandinavia and other Baltic countries, though it has been recognized also from North America. The six species are similar to G. ventricosum W. Gregory in the structure of the external occlusions over the areolae. The species also have prominent septa and pseudosepta, which distinguishes them from other species of the genus. They are distinguished from one another in the shapes and sizes of the valves. This group of closely related species may correspond to a species flock, a phenomenon in freshwater diatoms that is known from ancient lakes and flowing water systems. Further research is needed to confirm the monophyly of this group, and either support or challenge the idea of them representing a species flock.

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俄罗斯贝加尔湖Gomphonema Ehrenberg硅藻属(硅藻纲:Gomphonemataceae)的推定种群:与G. osum W. Gregory相似的6个新种描述

摘要利用光镜和扫描电镜对贝加尔湖硅藻属Gomphonema Ehrenberg的6个新种进行了描述。这6个物种在形态上与欧洲北部的一种主要分布在苏格兰、斯堪的纳维亚和其他波罗的海国家的分类群G. ventricular相似，不过北美也发现了这种分类群。这六个种在乳晕上的外部闭塞结构上与脑室鼠相似。该种还具有突出的隔和假隔，这使它们区别于该属的其他物种。它们在阀门的形状和大小上彼此不同。这组密切相关的物种可能对应于一个物种群，这是一种从古代湖泊和流水系统中已知的淡水硅藻现象。需要进一步的研究来证实这一群体的单一性，并支持或挑战它们代表一个物种群的观点。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.