Demarcation of family, genus and species boundaries in the Diaporthales has been tentative due to uninformative illustrations and descriptions, overlapping morphological characteristics, misplacement or poor condition of type specimens and shortage of molecular data from ex-type cultures. In this study, we obtained the type specimens or other authentic specimens of diaporthalean taxa from worldwide fungaria. We examined, described and illustrated them. This study is based on morphological characters from type or authentic specimens, details from protologue and original illustrations and molecular data obtained from GenBank. Combined analyses of nrITS, nrLSU, RPB2 and TEF1-α sequence data were used to construct the molecular phylogeny. Additionally, we provided separate phylogenetic trees for families when necessary to show the generic distribution within these families based on suitable gene markers. Based on morphology and phylogeny, we treat 17 genera previously assigned to Diaporthales genera incertae sedis within several families. For some genera we have designated new generic types as they are lacking type species or type species have affiliations with other families. We exclude Anisomycopsis from Diaporthales and place it in Xylariomycetidae genera incertae sedis. Tirisporellaceae, which was previously placed in Tirisporellales is placed in Diaporthales based on phylogeny and morphology. A new combination, Dendrostoma leiphaemia propose for Amphiporthe leiphaemia (Fr.) Butin. Based on the morphological characters and molecular data we accept 27 families and 138 genera within Diaporthales, 24 genera in Diaporthales genera incertae sedis and one genus in Xylariomycetidae genera incertae sedis. We provide notes for genera in Diaporthales genera incertae sedis, and excluded and doubtful genera are listed with notes on their taxonomy and phylogeny.

中文翻译：

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基于多基因系统发育和形态学的飞虱的分类限制

标本定界的科，属和物种边界的划分由于缺乏说明性的插图和说明，重叠的形态特征，类型标本的放错位置或状态差以及来自前类型培养物的分子数据不足，这种方法一直是暂时的。在这项研究中，我们从世界范围的真菌中获得了透虫类群的类型标本或其他真实标本。我们检查，描述和说明了它们。这项研究基于来自类型或真实标本的形态特征，原型和原始插图的详细信息以及从GenBank获得的分子数据。结合nrITS，nrLSU，RPB2和TEF1-α序列数据进行分析，以构建分子系统发育系统。此外，必要时，我们为家庭提供了单独的系统发育树，以根据合适的基因标记显示这些家庭中的一般分布。Diaporthales属地位未定几个家庭中。对于某些属，我们指定了新的通用类型，因为它们缺乏类型物种或类型物种与其他家族有隶属关系。我们将杜鹃花的肛门异位症排除在外，并将其放置在不定的Xylariomycetidae属中。Tirisporellaceae，这是以前放置在Tirisporellales置于Diaporthales基于系统发育和形态。一种新的组合，Dendrostoma leiphaemia提议用于两栖类脂血症（神父）布丁。基于形态学特征和分子数据，我们接受内27个科138属Diaporthales，24属于Diaporthales属地位未定并且在一个属Xylariomycetidae属地位未定。我们提供属票据Diaporthales属地位未定，被排除的，怀疑属与他们的分类和系统发育票据上市。