Two new Cymatopleura taxa (Bacillariophyta) from Xinjiang, China with slightly twisted frustules
Two new Cymatopleura taxa (Bacillariophyta) from Xinjiang, China with slightly twisted frustules
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DOI：
10.5507/fot.2017.014
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发表时间：
2017-09
期刊：
影响因子：
2.2
通讯作者：
Q. You;J. Kociolek;Meijia Cai;P. Yu;Quanxi Wang
中科院分区：
文献类型：
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作者：
Q. You;J. Kociolek;Meijia Cai;P. Yu;Quanxi Wang
用光学显微镜和扫描电子显微镜观察了新疆地区硅藻属Cymatopleura的两个新种：Cymatopleura Aquastudia和Cymatopleura xjiiangana，它们的瓣膜顶轴有扭曲。水母的瓣膜。11月瓣膜绕心尖轴扭转，呈异极，瓣膜中部边缘略有收缩。这些特征使其有别于该属的形态相似的分类群，例如Rauschenbach et Behning中的C.solea(BreBisson)W.Smith和C.spiralis Behning。本文报道了新锦鸡儿Cymatopleura xjiiangana sp.11月也表现出围绕顶轴的扭转，但很小，两端有弯曲的脊状突起，更宽的一端有延长的圆形尖端。这些特征将新疆锦鸡儿与耳壳锦鸡儿和椭圆锦鸡儿区分开来。这两个新分类群有助于揭示新疆地区淡水硅藻植物区系的独特性质，中国。
Two new species of the diatom genus Cymatopleura, Cymatopleura aquastudia and Cymatopleura xinjiangiana, that have torsion about the apical axis of the valves, are reported from Xinjiang Region, China, using light and scanning electron microscopy. The valves of Cymatopleura aquastudia sp. nov. exhibit torsion about the apical axis, are heteropolar, and are slightly constricted at the margin in the middle of the valves. These characters differentiate it from morphologically similar taxa in the genus, e.g. C. solea (Brebisson) W. Smith and C. spiralis Behning in Rauschenbach et Behning. The valves of Cymatopleura xinjiangiana sp. nov. also exhibit torsion about the apical axis, but are small and have curved ridges at both ends and rounded apices that are protracted at the wider ends. These features distinguish C. xinjiangiana from C. cochlea Brun and C. elliptica f. spiralis Boyer. These two new taxa help to demonstrate the unique nature of the freshwater diatom flora from Xinjiang Region, China.