A new genus of Eunotiales (Bacillariophyta, Bacillariophyceae: Peroniaceae), Sinoperonia, from Southeast Asia, exhibiting remarkable phenotypic plasticity with regard to the raphe system
A new genus of Eunotiales (Bacillariophyta, Bacillariophyceae: Peroniaceae), Sinoperonia, from Southeast Asia, exhibiting remarkable phenotypic plasticity with regard to the raphe system
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来自东南亚的Eunotiales（硅藻门，硅藻纲：Peroniaceae）新属，Sinoperonia，在中缝系统方面表现出显着的表型可塑性
DOI：
10.2216/17-21.1
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发表时间：
2018-03-01
期刊：
影响因子：
1.6
通讯作者：
Fan, Yawen
中科院分区：
文献类型：
--
作者：
Liu, Yan;Kociolek, John P.;Fan, Yawen
摘要：我们描述了Sinoperonia gen。十一月来自中国中南部山区和越南北部的淡水硅藻，其单一物种 S. polyraphiamorpha sp. 11 月，在不同种群中发育出单针虫、双针虫和节鞘虫，一般比例分别为 4:2:1（中国）或 2:1:1（越南）。光学和扫描电子显微镜对该物种的观察表明，中缝瓣膜也有缘门齿，因此它属于 Eunotiales。中缝瓣膜的中缝位于瓣膜的中部或附近，表明其位于 Peroniaceae 中，并且将这种新硅藻与这个小但在系统发育上很重要的群体中的其他两个属 Peronia 和 Actinellopsis 进行比较。我们讨论了这个新分类群的极端形态变异，以及越来越多的证据表明东南亚的淡水硅藻区系可能拥有许多特有的属和物种。
Abstract: We describe Sinoperonia gen. nov. for freshwater diatoms from mountainous regions of south-central China and northern Vietnam, whose single species, S. polyraphiamorpha sp. nov., develops monoraphid, biraphid and araphid frustules in the general proportions of 4:2:1 (China) or 2:1:1 (Vietnam), respectively, in different populations. Light and scanning electron microscope observations of this species show that raphe-bearing valves also have rimoportulae, and thus it is assigned to the Eunotiales. The raphe-bearing valves have the raphe at or near the middle of the valves, suggesting a placement in the Peroniaceae, and this new diatom is compared with the two other genera, Peronia and Actinellopsis, in this small but phylogenetically important group. We discuss the extreme morphological variation in this new taxon, and the growing body of evidence that the freshwater diatom flora of Southeast Asia may harbour many endemic genera as well as species.