Taxonomic studies of some often over-looked Diaporthomycetidae and Sordariomycetidae

Abstract

Sordariomycetes is an earlier-introduced and one of the widely distributed class of Ascomycota. The class was initially classified based on morphology in having inoperculate and unitunicate asci. With the development of DNA based phylogenetic analysis, several undetermined or polyphyletic members of Sordariomycetes were reclassified. However, not all species belonging to this class have been sequenced and analyzed. There are a number of species, especially those old and poorly studied ones which have never been sequenced before and not even recollected again for further taxonomic verification. One of the main objective in this study is to revise and update the taxonomy of several well-known early and poorly studied species whose classification are still obscure. Herein, we re-examined the type materials and/or authentic specimens together to explore 74 relatively poorly-studied genera, which mainly belong to Boliniales, Calosphaeriales, Chaetosphaeriales, Jobellisiales, and Sordariales classified under Diaporthomycetidae and Sordariomycetidae. We provide descriptions, notes, figures and/or drawings and discussed their phylogenetic relationships. As a result, the monotypic Jobellisiales is transferred from Hypocreomycetidae to Diaporthomycetidae. Based on phylogenetic analysis, the polyphyletic Lasiosphaeriaceae is divided into five families, Bombardiaceae (Apodospora, Bombardia, Bombardioidea, Fimetariella and Ramophialophora), Lasiosphaeriaceae (Anopodium, Bellojisia, Corylomyces, Lasiosphaeria, Mammaria and Zopfiella), Lasiosphaeridaceae (Lasiosphaeris), Strattoniaceae (Strattonia) and Zygospermellaceae (Episternus and Zygospermella). In addition, a new family Neoschizotheciaceae is established based on Neoschizothecium. Analysis of the type species of Boothiella, Stellatospora, Sulcatistroma and Tengiomyces placed them in Sordariaceae, Chaetomiaceae, Hypocreales and Coronophorales, respectively. We classify the genera lacking molecular data based on their morphology and expect them to be recollected; that is, Kacosphaeria in Calosphaeriales; Arnium, Biconiosporella, Camptosphaeria, Diffractella, Emblemospora, Eosphaeria, Periamphispora, Synaptospora and Tripterosporella in Sordariales; Conidiotheca in Sordariomycetes; Copromyces, Effetia, Endophragmiella and Tulipispora are accommodated in Ascomycota. Besides, we establish a new genus Neoschizothecium based on phylogenetic analysis. New combinations proposed: Camaropella amorpha, Cam. microspora, Cam. plana, Cladorrhinum grandiusculum, Cla. leucotrichum, Cla. terricola, Cla. olerum, Helminthosphaeria plumbea, Immersiella hirta, Jugulospora minor, Lasiosphaeris arenicola, Neoschizothecium aloides, Neo. carpinicola, Neo. conicum, Neo. curvisporum, Neo. fimbriatum, Neo. glutinans, Neo. inaequale, Neo. minicaudum, Neo. selenosporum, Neo. tetrasporum, Neurospora autosteira, Podospora brunnescens, P. flexuosa, P. jamaicensis, P. hamata, P. macrospora, P. spinosa, Strattonia petrogale and Triangularia microsclerotigena, T. nannopodalis, T. praecox, T. samala, T. tarvisina, T. unicaudata, T. yaeyamensis. New epithets are proposed for Apiorhynchostoma apiosporum and Podospora dacryoidea.