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Taxonomic study of Favolus and Neofavolus gen. nov. segregated from Polyporus (Basidiomycota, Polyporales)

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Abstract

We present a taxonomic study of ‘group Favolus’ and related species in Polyporus. Phylogenetic analyses of nurLSU and ITS regions revealed that the infrageneric ‘group Favolus’ is divided into two main clades. Fungi within the group share laterally stipitate basidiocarps, with non-crustose stipe surfaces, and are distinguishable by the morphology of the pileus surface. One clade is characterized by species with hyaline to brown cutis, composed of hyaline to brown agglutinated generative hyphae. The other clade accommodates species with radially striate pileus, and lacks any distinct cutis of agglutinated hyphae. We propose Neofavolus gen. nov., typified by N. alveolaris, for the former clade, and revise the genus Favolus, typified by F. brasiliensis, for the latter clade. Neofavolus includes N. mikawai and N. cremeoalbidus sp. nov., known only from temperate eastern Asia, in addition to N. alveolaris. Favolus includes members of the Polyporus grammocephalus complex, the P. tenuiculus complex, and P. pseudobetulinus. We reveal that the polypore known as ‘P. grammocephalus’ in Asia includes F. acervatus and F. emerici (= P. grammocephalus), whereas ‘P. tenuiculus’ includes three distinct species; F. brasiliensis from tropical America, and F. spathulatus and F. roseus from tropical Asia. Detailed descriptions and illustrations are provided for the accepted species in Favolus and Neofavolus.

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Acknowledgments

We are grateful to Ms. Y. Ando, Prof. Y.C. Dai (Beijing Forestry University), Dr. T. Fukiharu, Mr. E. Hatano, Ms. A. Hatano,, Dr. T. Kasuya, Mr. S. Kurogi, Prof. N. Maekawa (Tottori University), Mr. R. Nakano, Prof. E. Nagasawa, Mr. H. Sasaki, Mr. T. Suda, Prof. S. Tsujiyama (Kyoto Prefectural University) for kindly providing specimens. We would like to express our thanks to the curator of U.S. National Fungus Collections (BPI), National Museum of Nature and Science, Tokyo (TNS), Royal Botanic Gardens, Kew (K) and Muséum National d’Histoire Naturelle (PC) for the loan of holotypes and other specimens. We are also grateful to Dr. S. A. Redhead for his kind help on this study. This study was partly supported by Global COE Program “Advanced Utilization of Fungus/Mushroom Resources for Sustainable Society in Harmony with Nature”, MEXT, Japan.

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Authors and Affiliations

  1. Fungus/Mushroom Resource and Research Center, Faculty of Agriculture, Tottori University, Minami 4-101, Koyama, Tottori, Tottori, 680-8553, Japan

    Kozue Sotome

  2. Laboratory of plantpathology, Faculty of Agriculture, Tottori University, Minami 4-101, Koyama, Tottori, Tottori, 680-8553, Japan

    Yasunori Akagi

  3. Mycology and Pathology, Forestry Division, Forest Research Institute Malaysia (FRIM), Kepong, 52109, Selangor, Malaysia

    Su See Lee

  4. Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia (INPA), Av. André Araújo, 2.936, Petrópolis, CEP 69060-001, Manaus, AM, Brazil

    Noemia K. Ishikawa

  5. Kansai Research Center, Forestry and Forest Products Research Institute, Nagai-Kyutaro, Momoyama, Fushimi, Kyoto, 612-0855, Japan

    Tsutomu Hattori

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  1. Kozue Sotome
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Correspondence to Kozue Sotome.

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Sotome, K., Akagi, Y., Lee, S.S. et al. Taxonomic study of Favolus and Neofavolus gen. nov. segregated from Polyporus (Basidiomycota, Polyporales). Fungal Diversity 58, 245–266 (2013). https://doi.org/10.1007/s13225-012-0213-6

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