A new Sellaphora Mereschkowsky species (Bacillariophyceae) from Hainan Island, China, with comments on the current state of the taxonomy and morphology of the genus
A new Sellaphora Mereschkowsky species (Bacillariophyceae) from Hainan Island, China, with comments on the current state of the taxonomy and morphology of the genus
复制标题
中国海南岛Sellaphora Mereschkowsky一新种（硅藻纲）及其分类学和形态学现状的评论
DOI：
10.1080/0269249x.2020.1726470
复制
发表时间：
2020-03-21
期刊：
影响因子：
1.8
通讯作者：
Fan, Yawen
中科院分区：
文献类型：
--
作者：
Liu, Yan;Kociolek, John Patrick;Fan, Yawen
本文报道了硅藻属一新种Sellaphora wangii Y.Liu&Kociolek，sp.的光镜和扫描电子显微镜观察。11月，描述于海南岛的中国。本种具一凸起的圆锥体，在轴区域的两边各有一轴向凹槽或凹槽，包含延伸到凹槽的条纹，瓣膜上的圆形凹陷(即凹坑)在两个顶端。我们的新种是独特的，通过独特的特征组合与其他剑尾目分类群区分开来，包括瓣膜轮廓、波状的中缝和内部乳晕开口的蝴蝶结形状的处女膜。Sellaphora分类的不确定性和动态性质促使人们对该属物种的超微结构特征进行了审查。基于这一综述，我们确定了由不同超微结构特征组合组成的四个不同的Sellaphora分类群：条纹结构、乳晕的外部和内部开口、圆锥体、极杆和顶端凹陷。根据我们新物种的特征，它将被归入包括S.pupua的类群，即属型。
We present light and scanning electron microscope observations on a new species of the diatom genus Sellaphora, Sellaphora wangii Y.Liu & Kociolek, sp. nov., described from Hainan Island, China. This species has a raised conopeum with an axial groove or trough on either side of the axial area containing striae extending into the trough, and round depressions (i.e. pits) on the valve mantle at both apices. Our new species is distinctive and separated from other Sellaphora taxa by a unique combination of features that includes its valve outline, undulate raphe, and bow-tie shaped hymenes of the internal areola openings. The uncertainty and dynamic nature of the classification of Sellaphora prompted a review of the ultrastructural features found in species assigned to the genus. Based on this review, we identify four distinct groups of Sellaphora taxa organized by different combinations of ultrastructural features: stria structure, external and internal openings of the areolae, conopeum, polar bars, and apical pits. Based on the features present in our new species, it would be placed in the group that includes S. pupula, the generitype.