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首页> 外文期刊>Mycologia >Molecular phylogenetics and taxonomy of the Calvitimela aglaea complex (Tephromelataceae, Lecanorales)
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Molecular phylogenetics and taxonomy of the Calvitimela aglaea complex (Tephromelataceae, Lecanorales)

机译：Calvitimela aglaea complex（Tephromelataceae，Lecanorales）的分子系统学和分类学

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摘要

Contributing to the process of reassigning lecideoid lichens to natural taxa, we assessed phylogenetic relationships and species delimitation in the Calvitimela aglaea complex (Tephromelataceae) using DNA sequence data and morphological/anatomical and chemical characters. Phylogenedc analysis of nuclear (ITS, MCM7, TEF1-alpha) and mitochondrial (ribosomal SSU) DNA sequences revealed Mycoblastus as sister to a strongly supported clade comprising Calvitimela, Tephrolema and Violella. Species of these three genera fall into six strongly supported subclades with low backbone resolution. Two of these are represented by Tephromela and Violella, which are readily circumscribed morphologically. The remaining four subclades encompass lineages that have until now been assigned to Calvitimela. While Tephromela and Violella as currently circumscribed are recovered as monophyletic in our analyses, Calvitimela is paraphyletic, with four deeply divergent clades. We recognize these four clades as subgenera Calomela, Calvitimela, Paramela and Severidea. Our molecular results further support the recognition of two recently discovered sterile crusts as new species, Calvitimela cuprea and C. livida, distinguished from previously known species by their production of asexual diaspores and from each other by secondary metabolite chemistry. We also report Calvitimela perlata as new for continental North America.
机译：有助于将类蝶形苔藓地衣重新分配给自然类群的过程，我们使用DNA序列数据以及形态/解剖学和化学特征评估了Calvitimela aglaea复合体（Tephromelataceae）中的系统发生关系和物种定界。对核（ITS，MCM7，TEF1-alpha）和线粒体（核糖体SSU）DNA序列进行的系统进化分析显示，Mycoblastus是包括Calvitimela，Tephrolema和Violella的进化枝的姐妹。这三个属的物种分为六个具有低主干分辨率的强烈支持的子分支。这些中的两个以Tephromela和Violella为代表，它们在形态上很容易界定。其余的四个子小节包含迄今为止被分配给Calvitimela的世系。在我们的分析中，目前限定的Tephromela和Violella是单系统的，而Calvitimela是共系统的，具有四个深散的分支。我们认为这四个进化枝为Calomela，Calvitimela，Paramela和Severidea亚属。我们的分子结果进一步支持了两个最近发现的不育结壳作为新物种Calvitimela cuprea和C. livida的认识，它们通过产生无性孢子与以前已知的物种区别开来，并且通过次级代谢产物化学彼此区别开来。我们还报告称Calvitimela perlata是北美大陆的新品种。

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