Morales Eduardo A, Wetzel Carlos E, Ector Luc
Water Laboratory, University of Évora, P.I.T.E. Rua da Barba Rala No. 1, 7005-345 Évora, Portugal.
Institute of Earth Sciences - ICT, University of Évora, Rua Romão Ramalho n°. 59, 7000-671 Évora, Portugal.
PhytoKeys. 2021 Dec 13;187:23-70. doi: 10.3897/phytokeys.187.73338. eCollection 2021.
Based on two Andean Altiplano samples and on light and scanning electron microscopy analyses, we present six new species of "araphid" diatoms in the genus , , , , , , and Additional data are provided for four other known taxa, , , and , the latter species corresponding to a stat. nov. based on a variety of . Each taxon is described morphologically and compared with closely related published taxa, using characters such as axial area, virgae, vimines, areolar shape, volae, internal striae depositions, spines, flaps and apical pore fields, which are not usually used for species distinction within the genus. It is our intention that the detailed morphological descriptions of each taxon and the elaborate comparative tables we provide serve as a basis for correction of neo and paleo-databases for the Altiplano to produce a better account of autecological data and ecological change in the region. Some arguments for our continued use of a morphologically based approach are given in the context of rapid environmental degradation in the Andes and the difficulties in applying molecular approaches in countries such as Bolivia.
基于两个安第斯高原样本以及光学和扫描电子显微镜分析，我们提出了 属、 属、 属、 属、 属和 属中的六种新的“无节”硅藻。还提供了其他四个已知分类群、、 和 的更多数据，后一个物种基于多种特征对应一个新组合。每个分类群都进行了形态描述，并与密切相关的已发表分类群进行了比较，使用了诸如轴区、条纹、肋纹、网纹形状、叶状突起、内部条纹沉积、刺、瓣和顶端孔区等特征，这些特征通常不用于该属内的物种区分。我们的目的是，每个分类群的详细形态描述以及我们提供的详细比较表可作为修正安第斯高原新数据库和古数据库的基础，以便更好地记录该地区的个体生态数据和生态变化。在安第斯地区环境迅速退化以及在玻利维亚等国应用分子方法存在困难的背景下，给出了我们继续使用基于形态学方法的一些理由。
