Calyptosphaeria gen. nov.、Lentomitella、Spadicoides和Torrentispora (sordariomycates)的系统发育分类和属划分

IF 14.1 1区 生物学 Q1 MYCOLOGY
M. Réblová , A.N. Miller , K. Réblová , V. Štěpánek
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引用次数: 21

摘要

角鼻虫属在分类上有很长的混淆历史。虽然具有消失性腹肌的物种已被转移到小孔门和蛇口门,但具有持久腹肌的物种的分类地位尚未完全解决。在以往的DNA序列数据、培养和形态学研究中,角鼻菌属被划分为eurotiomytes和sordariomytes的13属。在我们的研究中,通过新的收集数据,培养和基于六个核位点的新DNA序列的系统发育,重新审视了具有持续性asci的剩余角鼻ella sp .的系统学。贝叶斯推断和最大似然分析支持了以前归属于Ceratostomella和其他形态相似的未知分类群的几个木栖物种的单系性,以及它们被划分为4个属,即Lentomitella、Spadicoides、Torrentispora和新描述的Calyptosphaeria。这个强壮的分支代表了索达菌科的异ospadicoidales。对ITS2二级结构的比较分析表明,Lentomitella分离株间存在遗传变异;11个物种被确认,其中5个是新引进的,2个是新组合。其他分类上的新发现包括Calyptosphaeria、Spadicoides和Torrentispora的4个新种和8个新组合。分子数据表明Spadicoides是多系的。该属的核心位于Xenospadicoidales;Spadicoides s.str .首次在实验中与性形态联系起来。根据DNA序列数据,单型属Xenospadicoides和Pseudodiplococcium归为Spadicoides的同义词,而Fusoidispora和Pseudoannulatascus归为Torrentispora的同义词。异种子囊孢子科的成员栖息在陆地和淡水环境中的腐木中,并具有一些形态特征,如没有间质组织,子囊体具有圆柱形或喙状颈,子囊体壁的解剖结构相似,具有非淀粉样顶环的薄壁单头子囊,崩解的子囊孢子,通常为椭球状或梭形子囊孢子,全胚-小齿或树形分生。本文根据完整型和其他代表性材料的修订、已发表的详细资料和现有的系统发育数据,列出了具有持久asci的修订角鼻ella sp .,并对每个物种的分类地位进行了重新评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Phylogenetic classification and generic delineation of Calyptosphaeria gen. nov., Lentomitella, Spadicoides and Torrentispora (Sordariomycetes)

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.

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来源期刊
Studies in Mycology
Studies in Mycology 生物-真菌学
CiteScore
35.60
自引率
3.00%
发文量
7
期刊介绍: The international journal Studies in Mycology focuses on advancing the understanding of filamentous fungi, yeasts, and various aspects of mycology. It publishes comprehensive systematic monographs as well as topical issues covering a wide range of subjects including biotechnology, ecology, molecular biology, pathology, and systematics. This Open-Access journal offers unrestricted access to its content. Each issue of Studies in Mycology consists of around 5 to 6 papers, either in the form of monographs or special focused topics. Unlike traditional length restrictions, the journal encourages submissions of manuscripts with a minimum of 50 A4 pages in print. This ensures a thorough exploration and presentation of the research findings, maximizing the depth of the published work.
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