{"title":"A comprehensive molecular phylogeny of Cephalotrichum and Microascus provides novel insights into their systematics and evolutionary history","authors":"T.P. Wei, Y.M. Wu, X. Zhang, H. Zhang, P.W. Crous, Y.L. Jiang","doi":"10.3767/persoonia.2024.52.05","DOIUrl":null,"url":null,"abstract":"The genera<i> Cephalotrichum</i> and<i> Microascus</i> contain ecologically, morphologically and lifestyle diverse fungi in<i> Microascaceae</i> (<i>Microascales</i>,<i> Sordariomycetes</i>) with a world-wide distribution. Despite previous studies having elucidated that<i> Cephalotrichum</i>\nand<i> Microascus</i> are highly polyphyletic, the DNA phylogeny of many traditionally morphology-defined species is still poorly resolved, and a comprehensive taxonomic overview of the two genera is lacking. To resolve this issue, we integrate broad taxon sampling strategies and the most\ncomprehensive multi-gene (ITS, LSU,<i> tef1</i> and<i> tub2</i>) datasets to date, with fossil calibrations to address the phylogenetic relationships and divergence times among major lineages of<i> Microascaceae</i>. Two previously recognised main clades,<i> Cephalotrichum</i> (24 species)and<i> Microascus</i> (49 species), were re-affirmed based on our phylogenetic analyses, as well as the phylogenetic position of 15 genera within<i> Microascaceae</i>. In this study, we provide an up-to-date overview on the taxonomy and phylogeny of species belonging to<i> Cephalotrichum</i> and<i> Microascus</i>, as well as detailed descriptions and illustrations of 21 species of which eight are newly described. Furthermore, the divergence time estimates indicate that the crown age of<i> Microascaceae</i> was around 210.37 Mya (95% HPD: 177.18–246.96 Mya) in the Late Triassic,\nand that<i> Cephalotrichum</i> and<i> Microascus</i> began to diversify approximately 27.07 Mya (95% HPD:20.47–34.37 Mya) and 70.46 Mya (95% HPD:56.96–86.24 Mya), respectively. Our results also demonstrate that multigene sequence data coupled with broad taxon sampling can help\nelucidate previously unresolved clade relationships.","PeriodicalId":20014,"journal":{"name":"Persoonia","volume":"22 1","pages":""},"PeriodicalIF":9.5000,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Persoonia","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3767/persoonia.2024.52.05","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MYCOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The genera Cephalotrichum and Microascus contain ecologically, morphologically and lifestyle diverse fungi in Microascaceae (Microascales, Sordariomycetes) with a world-wide distribution. Despite previous studies having elucidated that Cephalotrichum
and Microascus are highly polyphyletic, the DNA phylogeny of many traditionally morphology-defined species is still poorly resolved, and a comprehensive taxonomic overview of the two genera is lacking. To resolve this issue, we integrate broad taxon sampling strategies and the most
comprehensive multi-gene (ITS, LSU, tef1 and tub2) datasets to date, with fossil calibrations to address the phylogenetic relationships and divergence times among major lineages of Microascaceae. Two previously recognised main clades, Cephalotrichum (24 species)and Microascus (49 species), were re-affirmed based on our phylogenetic analyses, as well as the phylogenetic position of 15 genera within Microascaceae. In this study, we provide an up-to-date overview on the taxonomy and phylogeny of species belonging to Cephalotrichum and Microascus, as well as detailed descriptions and illustrations of 21 species of which eight are newly described. Furthermore, the divergence time estimates indicate that the crown age of Microascaceae was around 210.37 Mya (95% HPD: 177.18–246.96 Mya) in the Late Triassic,
and that Cephalotrichum and Microascus began to diversify approximately 27.07 Mya (95% HPD:20.47–34.37 Mya) and 70.46 Mya (95% HPD:56.96–86.24 Mya), respectively. Our results also demonstrate that multigene sequence data coupled with broad taxon sampling can help
elucidate previously unresolved clade relationships.
期刊介绍:
Persoonia aspires to publish papers focusing on the molecular systematics and evolution of fungi. Additionally, it seeks to advance fungal taxonomy by employing a polythetic approach to elucidate the genuine phylogeny and relationships within the kingdom Fungi. The journal is dedicated to disseminating high-quality papers that unravel both known and novel fungal taxa at the DNA level. Moreover, it endeavors to provide fresh insights into evolutionary processes and relationships. The scope of papers considered encompasses research articles, along with topical and book reviews.