Molecular phylogeny and systematics in lobose testate amoebae (Arcellinida)

无遗嘱的叶状阿米巴是最大的无遗嘱阿米巴类群。它们几乎存在于世界上所有的水生和陆生栖息地。由于他们的测试，这些变形虫的化石非常好，使它们成为古生物学和古生态学中重建环境变化的有价值的工具。由于实际原因，分类主要基于试验性状，但这些性状受外界因素的影响，因此形态种的变异性和可塑性很大。结果是，即使是常见和丰富的物种，如何划分也是不确定的。在本项目中，我们希望重建Arcellidae的分子系统发育，并重新评估它们在arcelliia目中的位置。我们计划建立一个结合分子（SSU-， LSU rDNA和ITS）和形态特征的Arcella-species分类框架。我们的目的是澄清广泛分布但可能是集体形态种的物种边界。一个中心问题是这些物种的当地种群是否由许多不同的菌株或隐种组成，以及这些物种在德国和匈牙利的地理分布如何。

Testate lobose amoebae (Arcellinidae) are the largest group of testate amoebae. They are present worldwide in almost all aquatic and terrestrial habitats. Due to their test these amoebae fossilize very well making them a valuable tool in paleobiology and paleoecology to reconstruct environmental change. For practical reasons classification is largely based on test characters but these characters are influenced by external factors and therefore the variability and plasticity of morphospecies is large. The result is an uncertainty how to delimit even common and abundant species. In this project we want to reconstruct the molecular phylogeny of the Arcellidae and reevaluate their position in the order Arcellinida. We plan to develop a framework for the classification of Arcella-species that combines molecular (SSU-, LSU rDNA and ITS) and morphological characters. Our aim is it to clarify the species boundaries of widely distributed but probably collective morphospecies. A central aspect is the question whether local populations of these species are composed of many different strains or cryptic species and how these are distributed geographically in Germany and Hungary.