Valve ultrastructure of two species of the diatom genus Gomphonema Ehrenberg (Bacillariophyta) from Yunnan Province, China
Valve ultrastructure of two species of the diatom genus Gomphonema Ehrenberg (Bacillariophyta) from Yunnan Province, China
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DOI：
10.5507/fot.2019.012
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发表时间：
2020-04
期刊：
影响因子：
2.2
通讯作者：
Yan Liu;J. Kociolek;Xinxin Lu;Yawen Fan
中科院分区：
文献类型：
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作者：
Yan Liu;J. Kociolek;Xinxin Lu;Yawen Fan
本文描述了云南泸沽湖和一条河流中两种淡水硅藻属Gomphonema的阀超微结构，并将其中一种描述为科学上的新物种。Gomphonema emines Skuja是在80多年前被描述的。这个大的，多柱头的种具有无咬合的单毛条纹，大的假隔和隔，内部柱头开口是圆形的，位于扩展的中央结节上的椭圆形凹陷内。在这些特征上，它与该属的大多数“典型”物种区别开来。Gomphonema yunnaniana Y.Liu et Kociolek等. 11 .具有无咬合的双棱纹，一个大而圆的外部柱头开口和一个升高的内部柱头开口，包含在唇状结构中。在这些特征上，它与该属的“典型”物种有所区别。我们将这两个推定的云南特有种与该属的其他种群进行了比较。
We describe valve ultrastructure of two species of the freshwater diatom genus Gomphonema from a stream and Lugu Lake in Yunnan Province, China, and describe one of these two species as new to Science. Gomphonema emines Skuja was described over 80 years ago. This large, multistigmate species has uniseriate striae without occlusions, large pseudosepta and septa, and internal stigma openings that are round, positioned within ellipsoidal depressions on the extended central nodule. In these features it is distinguished from most of the 'typical' species of the genus. Gomphonema yunnaniana Y.Liu et Kociolek sp. nov. has biseriate striae without occlusions, a large, round external stigma opening and an internal stigma opening that is elevated and contained within a lip-like structure. In these features it is distinguished from the 'typical' species of the genus. We compare these two putatively endemic species from Yunnan with other species groups of the genus.