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      Three new species of Cortinarius subgenus Telamonia (Cortinariaceae, Agaricales) from China

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          Abstract

          Cortinarius is an important ectomycorrhizal genus that forms a symbiotic relationship with certain trees, shrubs and herbs. Recently, we began studying Cortinarius in China and here we describe three new species of Cortinarius subg. Telamonia based on morphological and ecological characteristics, together with phylogenetic analyses. Cortinarius laccariphyllus sp. nov. (section Colymbadini ) is associated with broadleaf trees, with strongly hygrophanous basidiomata, special Laccaria -like lamellae and white and extremely sparse universal veil. Cortinarius neotorvus sp. nov. (section Telamonia ) is associated with broadleaf trees and is easily confused with C. torvus , but can be distinguished by the colour of the fresh basidiomes and the stipe usually somewhat tapering towards the base. Cortinarius subfuscoperonatus sp. nov. (section Fuscoperonati ) is associated with coniferous trees, with subglobose to broadly ellipsoid spores and is closely related to C. fuscoperonatus . A key to the new species and similar species in sections Colymbadini , Telamonia and Fuscoperonati is provided.

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          Most cited references 39

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          Phyutility: a phyloinformatics tool for trees, alignments and molecular data.

          Phyutility provides a set of phyloinformatics tools for summarizing and manipulating phylogenetic trees, manipulating molecular data and retrieving data from NCBI. Its simple command-line interface allows for easy integration into scripted analyses, and is able to handle large datasets with an integrated database. Phyutility, including source code, documentation, examples, and executables, is available at http://code.google.com/p/phyutility.
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            Determining threshold values for barcoding fungi: lessons from Cortinarius (Basidiomycota), a highly diverse and widespread ectomycorrhizal genus.

            Different distance-based threshold selection approaches were used to assess and compare use of the internal transcribed spacer (ITS) region to distinguish among 901 Cortinarius species represented by >3000 collections. Sources of error associated with genetic markers and selection approaches were explored and evaluated using MOTUs from genus and lineage based-alignments. Our study indicates that 1%-2% more species can be distinguished by using the full-length ITS barcode as compared to either the ITS1 or ITS2 regions alone. Optimal threshold values for different picking approaches and genetic marker lengths inferred from a subset of species containing major lineages ranged from 97.0% to 99.5% sequence similarity using clustering optimization and UNITE SH, and from 1% to 2% sequence dissimilarity with CROP. Errors for the optimal cutoff ranged from 0% to 70%, and these can be reduced to a maximum of 22% when excluding species lacking a barcode gap. A threshold value of 99% is suitable for distinguishing species in the majority of lineages in the genus using the entire ITS region but only 90% of the species could be identified using just the ITS1 or ITS2 region. Prior identification of species, lacking barcode gaps and their subsequent separate analyses, maximized the accuracy of threshold approaches.
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              A framework for a phylogenetic classification in the genusCortinarius(Basidiomycota, Agaricales) derived from morphological and molecular data

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                Author and article information

                Contributors
                Journal
                MycoKeys
                MycoKeys
                11
                urn:lsid:arphahub.com:pub:C004A564-9D6A-5F9F-B058-6A3815DFE9C3
                MycoKeys
                Pensoft Publishers
                1314-4057
                1314-4049
                2020
                14 July 2020
                : 69
                : 91-109
                Affiliations
                [1 ] Life Science College, Northeast Normal University, Changchun 130024, China Jilin Agricultural University Changchun China
                [2 ] Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University, Changchun 130118, China Northeast Normal University Changchun China
                [3 ] State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China Institute of Microbiology Beijing China
                [4 ] Microbiology Research Institute, Guangxi Academy of Agriculture Sciences, Nanning, 530007, China Guangxi Academy of Agriculture Sciences Nanning China
                [5 ] College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China Shenyang Agricultural University Shenyang China
                Author notes
                Corresponding authors: Rui-Qing Ji ( jiruiqingjrq@ 123456126.com ), Yu Li ( yuli966@ 123456126.com )

                Academic editor: O. Raspé

                Article
                49437
                10.3897/mycokeys.69.49437
                7381714
                Meng-Le Xie, Tie-Zheng Wei, Yong-Ping Fu, Dan Li, Liang-Liang Qi, Peng-Jie Xing, Guo-Hui Cheng, Rui-Qing Ji, Yu Li

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Funding
                Life Science College, Northeast Normal University Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Jilin Agricultural University
                Categories
                Research Article
                Agaricales
                Agaricomycetes
                Cortinariaceae
                DNA barcoding
                Identification key
                Phylogeny
                Taxonomy
                Asia
                China
                Far East

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