During a north–south latitudinal survey of aquatic fungi on submerged wood and herbaceous material in streams in the Asian region,we collected several hyphomycetous taxa.This paper is part of a series where we provid...During a north–south latitudinal survey of aquatic fungi on submerged wood and herbaceous material in streams in the Asian region,we collected several hyphomycetous taxa.This paper is part of a series where we provide illustrated accounts of these taxa and place them in a natural classification in the fungi.DNA sequence based phylogenies in recent literature have shown that Dendryphion,Sporidesmium and Torula-like species are polyphyletic in the phylum Ascomycota and their taxonomyhas been problematic due to a lack of understanding of the importance of morphological characters used to delimit taxa,as well as the lack of ex-type or reference strains.Based on multi-locus phylogenies together with morphology,we propose the novel family Distoseptisporaceae(Sordariomycetes)and three novel genera Neotorula(Pleosporales,Dothideomycetes),Distoseptispora(Sordariomycetes)and Pseudosporidesmium(Sordariomycetes).In addition,Dendryphion aquaticum,D.submersum,Distoseptispora fluminicola,D.aquatica,Kirschsteiniothelia submersa,Neotorula aquatica,Sporidesmium aquaticum,S.submersum and S.fluminicola are introduced as new species.Pseudosporidesmium knawiae comb.nov.is proposed to accommodate Sporidesmium knawiae in Sordariomycetes.The polyphyletic nature of Dendryphion,Sporidesmium and Torula-like species are partially resolved,but further sampling with fresh collections and molecular data of species are needed to obtain a natural classification.展开更多
Dictyosporiaceae fam.nov.is introduced to accommodate a holomorphic group of Dothideomycetes that are saprobes on decaying wood and plant debris in terrestrial and freshwater habitats.The sexual morph comprises Dictyo...Dictyosporiaceae fam.nov.is introduced to accommodate a holomorphic group of Dothideomycetes that are saprobes on decaying wood and plant debris in terrestrial and freshwater habitats.The sexual morph comprises Dictyosporium meiosporum,D.sexualis,Gregarithecium curvisporum,Pseudocoleophoma calamagrostidis and P.polygonicola.The sexual morphs are characterized by immersed to erumpent,superficial,globose to subglobose,dark brown to black ascomata,bitunicate asci,and septate,hyaline,sheathed ascospores.The asexual morphs are hyphomycetous with brown,multi-septate,cheirosporous conidia,produced from holoblastic conidiogenous cells,on micronematous conidiophores.Phylogenetic analyses of LSU,SSU and TEF1 sequence data place the genera with cheirospores in a monophyletic clade in the order Pleosporales.Phylogenetic analyses based on ITS sequence data show the family to comprise 44 distinct lineages that correspond to ten genera and an undetermined genus.Four new genera Dictyocheirospora,Dictyopalmispora,Jalapriya and Vikalpa,and eight new species Dictyocheirospora bannica,D.rotunda,D.vinaya,Dictyopalmispora palmae,Dictyosporium olivaceosporum,D.sexualis,Jalapriya pulchra,and Vikalpa lignicola,are introduced in the family.展开更多
基金HY Su thanks the National Natural Science Foundation of China(Project ID:31460015,31360013)Middleyounger academic leaders of candidate’s projects in Yunnan Province 2012HB-042 for the financial support to study freshwater fungi.DQ Zhou thanks the National Natural Science Foundation of China(Project ID:31160160)for financial support.K.D.Hyde is Visiting Professor at King Saud University.
文摘During a north–south latitudinal survey of aquatic fungi on submerged wood and herbaceous material in streams in the Asian region,we collected several hyphomycetous taxa.This paper is part of a series where we provide illustrated accounts of these taxa and place them in a natural classification in the fungi.DNA sequence based phylogenies in recent literature have shown that Dendryphion,Sporidesmium and Torula-like species are polyphyletic in the phylum Ascomycota and their taxonomyhas been problematic due to a lack of understanding of the importance of morphological characters used to delimit taxa,as well as the lack of ex-type or reference strains.Based on multi-locus phylogenies together with morphology,we propose the novel family Distoseptisporaceae(Sordariomycetes)and three novel genera Neotorula(Pleosporales,Dothideomycetes),Distoseptispora(Sordariomycetes)and Pseudosporidesmium(Sordariomycetes).In addition,Dendryphion aquaticum,D.submersum,Distoseptispora fluminicola,D.aquatica,Kirschsteiniothelia submersa,Neotorula aquatica,Sporidesmium aquaticum,S.submersum and S.fluminicola are introduced as new species.Pseudosporidesmium knawiae comb.nov.is proposed to accommodate Sporidesmium knawiae in Sordariomycetes.The polyphyletic nature of Dendryphion,Sporidesmium and Torula-like species are partially resolved,but further sampling with fresh collections and molecular data of species are needed to obtain a natural classification.
基金The authors thank the Training Grant BRT R_251181,BRT R_253012the Mushroom Research Foundation(MRF),Chiang Rai,Thailand and the Thailand Research Fund TRG5880152 for partially supporting this study.Kevin D.Hyde thanks the Chinese Academy of Sciences,project number 2013T2S0030+2 种基金for the award of Visiting Professorship for Senior International Scientists at Kunming Institute of Botany.Further,K.Tanaka would like to thank the Japan Society for the Promotion of Science(JSPS 25440199 and 26291084)Hirosaki University Grant for Exploratory Research by Young Scientists and Newly appointed Scientists for financial supportThis work was supported by the International Research Group Program(IRG-14-27),Deanship of Scientific Research,King Saud University,Saudi Arabia.
文摘Dictyosporiaceae fam.nov.is introduced to accommodate a holomorphic group of Dothideomycetes that are saprobes on decaying wood and plant debris in terrestrial and freshwater habitats.The sexual morph comprises Dictyosporium meiosporum,D.sexualis,Gregarithecium curvisporum,Pseudocoleophoma calamagrostidis and P.polygonicola.The sexual morphs are characterized by immersed to erumpent,superficial,globose to subglobose,dark brown to black ascomata,bitunicate asci,and septate,hyaline,sheathed ascospores.The asexual morphs are hyphomycetous with brown,multi-septate,cheirosporous conidia,produced from holoblastic conidiogenous cells,on micronematous conidiophores.Phylogenetic analyses of LSU,SSU and TEF1 sequence data place the genera with cheirospores in a monophyletic clade in the order Pleosporales.Phylogenetic analyses based on ITS sequence data show the family to comprise 44 distinct lineages that correspond to ten genera and an undetermined genus.Four new genera Dictyocheirospora,Dictyopalmispora,Jalapriya and Vikalpa,and eight new species Dictyocheirospora bannica,D.rotunda,D.vinaya,Dictyopalmispora palmae,Dictyosporium olivaceosporum,D.sexualis,Jalapriya pulchra,and Vikalpa lignicola,are introduced in the family.
