ABSTRACT A new diatom genus, Gololobovia gen. nov., is described from ancient Lake Baikal on the basis of light and scanning electron microscopy of its valves. The new genus has a single raphe per frustule and can be assigned to Achnanthidiaceae. Two species are described as new for science from Lake Baikal. These are Gololobovia mariae sp. nov. and Gololobovia baicalensis sp. nov. These species share all of the morphological features typical for the new genus, including uniseriate striae with internal pore occlusions, presence of slightly sinusoid raphe, and an asymmetric axial area that expands into a stauros to form the central area, similar to those in the genera Lemnicola and Gogorevia. Based on the presence of a stauros, uniseriate striae, and the same type of pore occlusions, we speculate that our new genus is more closely related phylogenetically to the above-mentioned monoraphid genera. A type of pore occlusion in the genera Lemnicola, Gogorevia and Gololobovia gen. nov. is discussed. New taxonomic combinations are proposed for Eucocconeis onegensis and Stauroneis obliqua, which are here transferred to our new genus.

中文翻译：

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Golobovia gen。十一月 – 来自贝加尔湖的一个新属，对单针硅藻孔隙闭塞的评论

摘要 一个新的硅藻属，Gololobovia gen。11 月，根据其阀门的光学和扫描电子显微镜从古代贝加尔湖描述。新属的每个果壳有一个中缝，可以归入针虫科。两个物种被描述为来自贝加尔湖的科学新物种。这些是 Gololobovia mariae sp。十一月 和 Gololobovia baicalensis sp。十一月 这些物种具有新属的所有典型形态特征，包括具有内部孔隙闭塞的单列条纹，存在轻微的正弦缝，以及一个不对称的轴向区域，该区域扩展成一个星状以形成中心区域，类似于该属中的那些莱姆尼科拉和戈戈雷维亚。基于 stauros、单列条纹和相同类型的毛孔闭塞的存在，我们推测，我们的新属在系统发育上与上述的单刺属更密切相关。Lemnicola、Gogorevia 和 Gololobovia 属中的一种孔隙闭塞。十一月 进行了讨论。为 Eucocconeis onegensis 和 Stauroneisobliqua 提出了新的分类组合，在此将它们转移到我们的新属中。