The genus Ceratostomella has a long history of taxonomic confusion. While species with evanescent asci have been transferred to the Microascales and Ophiostomatales, the taxonomic status of species with persistent asci has not been completely resolved. In previous studies using DNA sequence data, cultures and morphology, several Ceratostomella spp. were allocated in 13 genera in the Eurotiomycetes and Sordariomycetes. In our study, the systematics of the remaining Ceratostomella spp. with persistent asci is revisited with new collection data, cultures and phylogeny based on novel DNA sequences from six nuclear loci. Bayesian inference and Maximum Likelihood analyses support the monophyly of several wood-inhabiting species formerly classified in Ceratostomella and other unknown morphologically similar taxa and their division into four genera, i.e. Lentomitella, Spadicoides, Torrentispora and the newly described Calyptosphaeria. This robust clade represents the order Xenospadicoidales in the Sordariomycetidae. Comparative analysis of the ITS2 secondary structure revealed a genetic variation among Lentomitella isolates; 11 species were recognised, of which five are newly introduced and two are new combinations. Other taxonomic novelties include four new species and eight new combinations in Calyptosphaeria, Spadicoides, and Torrentispora. Molecular data suggest that Spadicoides is polyphyletic. The core of the genus is positioned in the Xenospadicoidales; Spadicoides s. str. is experimentally linked with sexual morphs for the first time. Based on DNA sequence data, the monotypic genera Xenospadicoides and Pseudodiplococcium are reduced to synonymy under Spadicoides, while Fusoidispora and Pseudoannulatascus are synonymised with Torrentispora. Members of the Xenospadicoidales inhabit decaying wood in terrestrial and freshwater environments and share a few morphological characters such as the absence of stromatic tissue, ascomata with a cylindrical or rostrate neck, similar anatomies of the ascomatal walls, thin-walled unitunicate asci with a non-amyloid apical annulus, disintegrating paraphyses, usually ellipsoidal to fusiform ascospores and holoblastic-denticulate or tretic conidiogenesis. Revised Ceratostomella spp. with persistent asci are listed and the taxonomic status of each species is re-evaluated based on revision of the holotype and other representative material, published details and available phylogenetic data.

ceratostomella属具有悠久的分类混乱历史。虽然与消逝ASCI物种已被转移到Microascales和Ophiostomatales，具有持久ASCI物种的分类地位还没有得到彻底解决。在以前的研究中，使用DNA序列数据，培养物和形态学研究了几种Ceratostomella spp。被分配到了欧洲真菌和伞形霉菌属的13个属中。在我们的研究中，剩下的小角藻的系统学spp。基于六个核基因座的新DNA序列，利用新的收集数据，培养物和系统发育对具有持续性腹水的人进行了重新研究。贝叶斯推理和最大似然分析支持多种木栖物种以前分类的单系Ceratostomella和其他未知的形态相似的类群和他们的分裂成4个属，即Lentomitella，Spadicoides，Torrentispora和新描述的Calyptosphaeria。这一强大的分支代表的顺序Xenospadicoidales在Sordariomycetidae。ITS2二级结构的比较分析表明，小米氏菌之间存在遗传变异隔离 识别出11种，其中5种是新引入的，2种是新的组合。其他分类新奇包括四个新品种，并在八个新组合Calyptosphaeria，Spadicoides和Torrentispora。分子数据表明，Spadicoides具有多系性。该属的核心定位在Xenospadicoidales ; Spadicoides s。海峡 首次在实验上与性爱相关联。根据DNA序列数据，单型属Xenospadicoides和Pseudodiplococcium在Spadicoides下被简化为同义词，而Fusoidispora和Pseudoannulatascus被synonymised与Torrentispora。Xenospadicoidales的成员居住在陆地和淡水环境中的腐烂木材中，并具有一些形态特征，例如不存在间质组织，具圆柱形或ro状颈部的子囊，无子囊壁的类似解剖结构，薄壁的单子囊壁和无子囊。淀粉样的顶环，崩解的鳞茎，通常椭圆形到梭形子囊状孢子和成珠状的或具脉状的成生。修订后的小肠藻spp。列出具有持续性asci的物种，并根据全型和其他代表性材料的修订，已发布的详细信息和可用的系统发育数据，重新评估每个物种的分类学状态。