Yang Er-Fu, Phookamsak Rungtiwa, Jiang Hong-Bo, Tibpromma Saowaluck, Bhat Darbhe J, Karunarathna Samantha C, Dai Dong-Qin, Xu Jian-Chu, Promputtha Itthayakorn
Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China.
Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
J Fungi (Basel). 2022 Feb 28;8(3):243. doi: 10.3390/jof8030243.
As a result of an ongoing research survey of microfungi in Yunnan, China, several saprobic ascomycetes were collected from various host substrates. Preliminary morphological analyses identified a few of these taxa as species. We obtained DNA sequence data of the species from pure cultures and investigated their phylogenetic affinities. Phylogenetic analyses of a combined LSU, ITS, SSU and sequence dataset demonstrated that five isolates of formed well-resolved subclades within Periconiaceae. Accordingly, three new species are introduced viz. , and , and new host and geographical records of and , are also reported from dead branches of and . formed a monophyletic clade with in the present phylogenetic analyses. Results of the pairwise homoplasy index (PHI) test indicated significant recombination between and . Therefore, has been synonymized under . In addition, we re-illustrated and studied the type specimen of the sexual genus . As a type species of , features similar morphology to the sexual morph of and . We therefore synonymize under based on morphological and phylogenetic evidence. Furthermore, our new isolates produced brown conidia of asexual morph in agar media typical of the genus . Based on morphological comparison with in vitro and phylogenetic status of , we also treat as a synonym of . Detailed descriptions and illustrations of three novel taxa and two new records of and as well as the illustration of comb. nov. are provided. An updated phylogenetic tree of Periconiaceae using maximum likelihood and Bayesian inference analyses is constructed. Generic circumscription of is amended.
作为对中国云南微真菌正在进行的一项研究调查的结果，从各种寄主基质中采集到了几种腐生子囊菌。初步形态学分析将其中一些分类单元鉴定为物种。我们从纯培养物中获得了这些物种的DNA序列数据，并研究了它们的系统发育亲缘关系。对LSU、ITS、SSU和 序列数据集进行的系统发育分析表明， 的五个分离株在围盘菌科内形成了分辨率良好的亚分支。因此，引入了三个新的 物种，即 、 和 ，并且还报道了 和 的新寄主及地理记录，它们来自 和 的枯枝。在目前的系统发育分析中， 与 形成了一个单系分支。成对同质性指数（PHI）测试结果表明 与 之间存在显著重组。因此， 已被归为 的异名。此外，我们重新绘制并研究了有性属 的模式标本。作为 的模式种， 与 和 的有性形态具有相似的形态。因此，基于形态学和系统发育证据，我们将 归为 的异名。此外，我们的新分离株在琼脂培养基上产生了该属典型的棕色无性分生孢子。基于与体外 的形态比较以及 的系统发育地位，我们也将 视为 的异名。提供了三个新分类单元以及 和 的两个新记录的详细描述和图示，以及 新组合的图示。构建了使用最大似然法和贝叶斯推断分析的围盘菌科更新系统发育树。修订了 的属界定。
