Mironov Andrei, Maltsev Yevhen, Kociolek John Patrick, Kezlya Elena, Liu Yan, Kulikovskiy Maxim
College of Life Science and Technology, Harbin Normal University, HNU, 1 Shida Road, Limin Economic Development Zone, Harbin, 150080, Heilongjiang Province, China.
К.A. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia.
Sci Rep. 2024 Dec 28;14(1):31045. doi: 10.1038/s41598-024-82213-0.
In this study, based on the results of molecular analysis of SSU rRNA and rbcL sequences, we propose the descriptions of two new families in the order Cymbellales. Molecular data demonstrates that diatoms of the genus Encyonema constitute an independent monophyletic clade, which represents a new family described herein - Encyonemataceae fam. nov. Another family introduced in this article, with regards to molecular data, is Witkowskiaceae fam. nov. In our research, it is comprised of three closely related genera - Geissleria, Paraplaconeis and Witkowskia. The results of performed molecular investigation are supported by morphological analysis. Morphological diagnoses of the new families are based on a combination of features: type of valve symmetry, raphe structure, presence and position of stigmata or stigmoids, number and location of apical pore fields and morphology of chloroplast. In addition, we discuss the phylogeny of selected genera of the order Cymbellales. Based on their morphology, 3 and 5 genera are assigned with provisionary position in Encyonemataceae fam. nov. and Witkowskiaceae fam. nov., respectively.
在本研究中，基于对小亚基核糖体RNA（SSU rRNA）和核酮糖-1,5-二磷酸羧化酶/加氧酶大亚基（rbcL）序列的分子分析结果，我们提议对 Cymbellales 目下的两个新科进行描述。分子数据表明，Encyonema 属的硅藻构成一个独立的单系分支，它代表了本文所描述的一个新科——Encyonemataceae 科。nov. 本文引入的另一个科，根据分子数据，是 Witkowskiaceae 科。nov. 在我们的研究中，它由三个密切相关的属组成——Geissleria、Paraplaconeis 和 Witkowskia。所进行的分子研究结果得到了形态学分析的支持。新科的形态学诊断基于多种特征的组合：瓣膜对称性类型、假沟结构、小孔或类小孔的存在和位置、顶孔区的数量和位置以及叶绿体的形态。此外，我们讨论了 Cymbellales 目选定属的系统发育。根据它们的形态，分别有3个属和5个属被暂时归入 Encyonemataceae 科。nov. 和 Witkowskiaceae 科。nov.
