Three new subaerial Achnanthidium (Bacillariophyta) species from a karst landform in the Guizhou Province, China

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2019-10-30 DOI:10.5507/FOT.2019.005

Q. You, Yue Cao, P. Yu, J. Kociolek, Lixuan Zang, Bo Wu, R. Lowe, Quanxi Wang

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引用次数: 12

Abstract

Three new subaerial species of Achnanthidium are examined and described from a karst landform of central-south China based on light and scanning electron microscopy observations, and are compared with similar taxa worldwide. A. mediolanceolatum sp. nov. is elliptical-lanceolate, not linear-lanceolate as is more typical in this genus, as well as having a bow-tie shaped central area on the raphe valve and a large lanceolate axial area on the rapheless valve, features which together make it easy to distinguish this species from others. A. parvulum sp. nov. and A. guizhouensis sp. nov. are linear-elliptical in shape, which is more common for Achnanthidium and they differ from other species mainly in size, raphe, density of striae and shape of the central area. We compared these three new species with morphologically-similar taxa, and present their ecological settings and distributions as well. The relationship between Achnanthidium and Psammothidium is discussed, and the data from these new species from Guizhou presented herein suggest the two genera are difficult to separate.

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贵州喀斯特地貌中的三个陆生无柄藻新种

在光镜和扫描电镜观察的基础上，对中国中南部喀斯特地貌中的三种新的陆生植物Achnanthidium进行了研究和描述，并与世界上类似的分类群进行了比较。a . mediolanceolatum sp. nov.是椭圆形披针形的，而不是在这个属中更典型的线状披针形，以及在raphe瓣上有一个蝴蝶结形的中心区域和在raphe瓣上有一个大的披针形轴向区域，这些特征一起使这个物种很容易与其他物种区分开来。小叶蝉(A. parvulum sp.)和贵州叶蝉(A. guizhouensis sp. 11 .)呈线形-椭圆型，以蜘蛛蛛(Achnanthidium)多见，与其他种的差异主要表现在大小、缝型、条纹密度和中部形状等方面。我们将这三个新种与形态相似的分类群进行了比较，并介绍了它们的生态环境和分布。本文讨论了Achnanthidium和Psammothidium的关系，并从贵州这些新种的资料来看，这两个属难以区分。

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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.

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