Inaccurate taxonomic placement of fossils can lead to the accumulation of errors in molecular clock studies and their generated evolutionary lineages. There are limited fossil data that can be used in divergence time estimations. Therefore, reliable morphological characterization and taxonomical identification of fossil fungi are extremely important. Most fossils of Dothideomycetes and Sordariomycetes are from the early Cenozoic (66–23 Mya), with fewer from the late Mesozoic (174–145 Mya). However, it is hard to distinguish some fossil descriptions as photographs and illustrations are unclear; thus, the validity of using these fossils in calibrations of molecular clocks is problematic. This study brings scattered paleobiological data on selected fossil Ascomycota, using descriptions, fossil images and illustrations, coupled with recent age estimations, and taxonomic and phylogenetic affinity of extant species. As an integrated approach, this study summarizes a historical fossil outline with a reliable minimum age for 16 calibrating points viz. crown of Aigialus, Anzia, Aspergillus, Asterina, Calicium chlorosporum–C. nobile, Capnodiales, Chaenotheca, Colletotrichum, Diaporthales, Meliola, Ophiocordyceps, Microthyriales, Microthyrium, Muyocopron, Pezizomycotina and Stigmatomyces. A scheme of Ascomycota ancient lineages is also provided in order to improve divergence time estimations.

中文翻译：

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基于估算的现代回顾，对古亚种孢子菌谱系的发散时间校准

化石分类分类的不正确会导致分子钟研究及其生成的进化谱系中错误的积累。可用于发散时间估计的化石数据有限。因此，化石真菌的可靠形态学表征和分类学鉴定非常重要。十二指肠菌和伞形霉菌的大多数化石来自新生代早期（66-23 Mya），中生代晚期（174-145 Mya）较少。但是，由于照片和插图不清楚，因此很难区分某些化石的描述。因此，在分子钟的标定中使用这些化石的有效性是有问题的。这项研究使用描述，化石图像和插图，为选定的化石虫科提供了散布的古生物学数据，加上最近的年龄估计，以及现存物种的分类学和系统发育亲和力。作为一种综合方法，本研究总结了具有可靠最小年龄的历史化石轮廓，可用于16个校准点。冠Aigialus，Anzia，曲霉属，Asterina，Calicium chlorosporum - C.黄春菊，煤炱目，Chaenotheca，炭疽病，Diaporthales，Meliola，Ophiocordyceps，Microthyriales，Microthyrium，Muyocopron，盘菌亚门和Stigmatomyces。为了改善发散时间估计，还提供了一种子囊古谱系方案。