Siemensma Ferry, Apothéloz-Perret-Gentil Laure, Holzmann Maria, Clauss Steffen, Völcker Eckhard, Pawlowski Jan
Julianaweg 10, 1241VW Kortenhoef, Netherlands.
Dept. of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland.
Eur J Protistol. 2017 Aug;60:28-44. doi: 10.1016/j.ejop.2017.05.006. Epub 2017 May 31.
Most foraminifera inhabit marine habitats, but some species of monothalamids have been described from freshwater environments, mainly from Swiss water bodies over 100 years ago. Recent environmental DNA surveys revealed the presence of four major phylogenetic clades of freshwater foraminifera. However, until now only one of them (clade 2) has been associated to a morphologically described taxon-the family Reticulomyxidae. Here, we present morphological and molecular data for the genera representing the three remaining clades. We describe two new agglutinated freshwater genera from China and the Netherlands, Lacogromia and Limnogromia, which represent clades 3 and 4, respectively. We also report the first ribosomal DNA sequences of the genus Lieberkuehnia, which place this genus within clade 1. Our study provides the first morphotaxonomic documentation of molecular clades of freshwater foraminifera, showing that the environmental DNA sequences correspond to the agglutinated monothalamous species, morphologically similar to those described 100 years ago.
大多数有孔虫栖息于海洋环境，但100多年前就已在淡水环境中发现了一些单房有孔虫物种，主要来自瑞士的水体。最近的环境DNA调查揭示了淡水有孔虫的四个主要系统发育分支的存在。然而，到目前为止，其中只有一个分支（分支2）与一个形态学上已描述的分类群——网粘菌科相关。在这里，我们展示了代表其余三个分支的属的形态学和分子数据。我们描述了来自中国和荷兰的两个新的凝集性淡水属，即湖生有孔虫属和沼生有孔虫属，它们分别代表分支3和分支4。我们还报告了利伯克恩有孔虫属的首个核糖体DNA序列，该序列将该属置于分支1内。我们的研究提供了淡水有孔虫分子分支的首个形态分类学记录，表明环境DNA序列与凝集性单房物种相对应，在形态上与100年前描述的物种相似。
