Some traditional diatom species have long been considered ‘cosmopolitan’, i.e., they are ubiquitous in suitable habitats. However molecular methods have revealed that some of these diatoms are complexes consisting of a few or many species, whose identification by eye with LM is difficult or impossible. This is true of several groups within Pinnularia, including the P. subgibba group, in which molecular species delimitation based on cox1-5P and D1–D3 LSU rDNA markers revealed 15 species within a dataset of 58 unique genotypes, representing 105 strains of the group. One clade comprises reproductively compatible clones from Scottish lakes and its morphology does not correspond exactly to any of the known Pinnularia species; thus the description of a new species ‘P. lacustrigibba’ sp. nov. is proposed.

中文翻译：

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一个新种 Pinnularia laustrigibba sp。十一月 在 Pinnularia subgibba 组（芽孢杆菌科）内

一些传统的硅藻物种长期以来一直被认为是“世界性的”，即它们在合适的栖息地中无处不在。然而，分子方法表明，这些硅藻中的一些是由少数或许多物种组成的复合体，很难或不可能通过肉眼识别这些硅藻。Pinnularia 内的几个组都是如此，包括 P. subgibba 组，其中基于 cox1-5P 和 D1-D3 LSU rDNA 标记的分子物种划分揭示了 58 个独特基因型数据集中的 15 个物种，代表该组的 105 个菌株. 一个进化枝包含来自苏格兰湖泊的生殖相容克隆，其形态与任何已知的 Pinnularia 物种都不完全对应；因此描述了一个新物种'P。lacustriibba' sp. 十一月 被提议。