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Fungal diversity
Fungal Diversity Press
Fungal diversity

Fungal Diversity Press

1560-2745

Fungal diversity/Journal Fungal diversitySCI
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    Taxonomy, phylogeny, molecular dating and ancestral state reconstruction of Xylariomycetidae (Sordariomycetes)

    Samarakoon, Milan C.Hyde, Kevin D.Maharachchikumbura, Sajeewa S. N.Stadler, Marc...
    88页
    查看更多>>摘要：Xylariomycetidae (Ascomycota) is a highly diversified group with variable stromatic characters. Our research focused on inconspicuous stromatic xylarialean taxa from China, Italy, Russia, Thailand and the United Kingdom. Detailed morphological descriptions, illustrations and combined ITS-LSU-rpb2-tub2-tef1 phylogenies revealed 39 taxa from our collections belonging to Amphisphaeriales and Xylariales. A new family (Appendicosporaceae), five new genera (Magnostiolata, Melanostictus, Neoamphisphaeria, Nigropunctata and Paravamsapriya), 27 new species (Acrocordiella photiniicola, Allocryptovalsa sichuanensis, Amphisphaeria parvispora, Anthostomella lamiacearum, Apiospora guiyangensis, A. sichuanensis, Biscogniauxia magna, Eutypa camelliae, Helicogermslita clypeata, Hypocopra zeae, Magnostiolata mucida, Melanostictus longiostiolatus, M. thailandicus, Nemania longipedicellata, N. delonicis, N. paraphysata, N. thailandensis, Neoamphisphaeria hyalinospora, Neoanthostomella bambusicola, Nigropunctata bambusicola, N. nigrocircularis, N. thailandica, Occultitheca rosae, Paravamsapriya ostiolata, Peroneutypa leucaenae, Seiridium italicum and Vamsapriya mucosa) and seven new host/geographical records are introduced and reported. Divergence time estimates indicate that Delonicicolales diverged from Amphisphaeriales + Xylariales at 161 (123-197) MYA. Amphisphaeriales and Xylariales diverged 154 (117-190) MYA with a crown age of 127 (92-165) MYA and 147 (111-184) MYA, respectively. Appendicosporaceae (Amphisphaeriales) has a stem age of 89 (65-117) MYA. Ancestral character state reconstruction indicates that astromatic, clypeate ascomata with aseptate, hyaline ascospores that lack germ slits may probably be ancestral Xylariomycetidae having plant-fungal endophytic associations. The Amphisphaeriales remained mostly astromatic with common septate, hyaline ascospores. Stromatic variations may have developed mostly during the Cretaceous period. Brown ascospores are common in Xylariales, but they first appeared in Amphisphaeriaceae, Melogrammataceae and Sporocadaceae during the early Cretaceous. The ascospore germ slits appeared only in Xylariales during the Cretaceous after the divergence of Lopadostomataceae. Hyaline, filiform and apiospores may have appeared as separate lineages, providing the basis for Xylariaceae, which may have diverged independently. The future classification of polyphyletic xylarialean taxa will not be based on stromatic variations, but the type of ring, the colour of the ascospores, and the presence or absence or the type of germ slit.
      原文链接:
    • NSTL
    • Springer Nature

    Taming the beast: a revised classification of Cortinariaceae based on genomic data

    Liimatainen, KareKim, Jan T.Pokorny, LisaKirk, Paul M....
    82页
    查看更多>>摘要：Family Cortinariaceae currently includes only one genus, Cortinarius, which is the largest Agaricales genus, with thousands of species worldwide. The species are important ectomycorrhizal fungi and form associations with many vascular plant genera from tropicals to arctic regions. Genus Cortinarius contains a lot of morphological variation, and its complexity has led many taxonomists to specialize in particular on infrageneric groups. The previous attempts to divide Cortinarius have been shown to be unnatural and the phylogenetic studies done to date have not been able to resolve the higher-level classification of the group above section level. Genomic approaches have revolutionized our view on fungal relationships and provide a way to tackle difficult groups. We used both targeted capture sequencing and shallow whole genome sequencing to produce data and to perform phylogenomic analyses of 75 single-copy genes from 19 species. In addition, a wider 5-locus analysis of 245 species, from the Northern and Southern Hemispheres, was also done. Based on our results, a classification of the family Cortinariaceae into ten genera-Cortinarius, Phlegmacium, Thaxterogaster, Calonarius, Aureonarius, Cystinarius, Volvanarius, Hygronarius, Mystinarius, and Austrocortinarius-is proposed. Seven genera, 10 subgenera, and four sections are described as new to science and five subgenera are introduced as new combinations in a new rank. In addition, 41 section names and 514 species names are combined in new genera and four lecto- and epitypes designated. The position of Stephanopus in suborder Agaricineae remains to be studied. Targeted capture sequencing is used for the first time in fungal taxonomy in Basidiomycetes. It provides a cost-efficient way to produce -omics data in species-rich groups. The -omics data was produced from fungarium specimens up to 21 years old, demonstrating the value of museum specimens in the study of the fungal tree of life. This study is the first family revision in Agaricales based on genomics data and hopefully many others will soon follow.
      原文链接:
    • NSTL
    • Springer Nature