Biogeography and species diversity of freshwater <i>Savoryellomycetidae</i> (<i>Sordariomycetes</i>) fungi

The subclass <i>Savoryellomycetidae</i> (<i>Sordariomycetes</i>, <i>Ascomycota</i>) primarily consists of fungal saprobes on decayed wood from freshwater habitats. They are widely distributed worldwide with a higher diversity in Asia. This study comprehensively examines freshwater <i>Savoryellomycetidae</i> species in China, focusing on their diversity, taxonomy, phylogeny, and biogeography. A comprehensive multigene phylogenetic analysis of <i>Savoryellomycetidae</i> was performed to provide better taxonomic insights and classification of known species, resulting in the identification of 38 species, with detailed sample collection sites also provided. Among these, ten new species and three new combinations are introduced. Nine species are newly recorded in China. Both sexual and asexual morphs of <i>Ascolacicola aquatica</i> and <i>Phaeoisaria filiformis</i> are described. Additionally, some taxonomic uncertainties within existing classifications have been resolved through phylogenetic analyses and morphological characteristics. Furthermore, by integrating our data with previous studies, a biogeographic analysis of <i>Savoryellomycetidae</i> is conducted. This not only accurately depicts the number of species in this subclass but also reveals the global distribution of freshwater <i>Savoryellomycetidae</i> species. This study contributes valuable insights into the species diversity of <i>Savoryellomycetidae</i> fungi in freshwater habitats and offers a clearer understanding of the systematic relationships among taxa in this subclass.

萨沃勒酵母亚纲（<i>Savoryellomycetidae</i>）隶属于粪壳菌纲（<i>Sordariomycetes</i>）、子囊菌门（<i>Ascomycota</i>），该类群主要为栖息于淡水生境腐朽木材上的真菌腐生菌。其在全球范围内广泛分布，且在亚洲具有更高的物种多样性。本研究针对中国淡水生境中的萨沃勒酵母亚纲物种开展了全面调研，重点聚焦其物种多样性、分类学、系统发育学及生物地理学研究。通过对萨沃勒酵母亚纲开展全面的多基因系统发育分析，本研究为已知物种的分类学解析与分类界定提供了更可靠的依据，共鉴定出38个物种，并附上了详细的样本采集位点信息。其中，本研究发表了10个新种与3个新组合；另有9个物种为中国新记录种。本研究对水生囊孢壳菌（<i>Ascolacicola aquatica</i>）与丝状暗柱孢霉（<i>Phaeoisaria filiformis</i>）的有性型与无性型形态特征均进行了详细描述。此外，本研究通过系统发育分析与形态特征观察，解决了当前分类体系中存在的部分分类学争议。进一步地，本研究将本次获取的数据与既往研究成果相结合，开展了萨沃勒酵母亚纲的生物地理学分析。该分析不仅精准阐明了该亚纲的物种数量，还揭示了淡水生境萨沃勒酵母亚纲物种的全球分布格局。本研究为淡水生境中萨沃勒酵母亚纲真菌的物种多样性研究提供了宝贵参考，并进一步厘清了该亚纲内各类群的系统发育关系。

搜集汇总

背景与挑战

背景概述

该数据集基于对淡水Savoryellomycetidae真菌（子囊菌门）的研究，通过多基因系统发育和形态学分析，鉴定了38个物种，包括10个新物种和3个新组合，并描述了Ascolacicola aquatica和Phaeoisaria filiformis的性态和无性态。数据集还提供了详细的样本采集地点和生物地理学分析，旨在揭示该类真菌在全球的分布和多样性，特别关注中国地区的物种丰富度。