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Morphological and phylogenetic studies of two new neotropical species of Loweomyces (Polyporales, Basidiomycota)

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Abstract

The genus Loweomyces is characterized by resupinate to pileate, sessile to stipitate basidiomes, monomitic to dimitic hyphal system with presence of pseudoskeletal hyphae, thin-walled hymenial cystidia, and usually cyanophilous spore and hyphal walls. The genus has not been widely accepted and some authors placed Loweomyces species in Abortiporus, Tyromyces or Antrodiella. During a survey of polypores in southern Brazil, two unidentified species with similar features to Loweomyces spp. were found. Morphological and molecular studies were carried out in order to understand their morphological and evolutionary relationships and to confirm their phylogenetic placement and taxonomic identity. DNA sequences of the internal transcribed spacer and large subunit of ribosomal RNA gene were used for phylogenetic studies. Both studied species have similar morphological characteristics to other Loweomyces spp. and group close to L. fractipes phylogenetically; therefore, Loweomyces spissus and L. tomentosus are proposed as new species. Full descriptions, illustrations of microscopic features, and an identification key to the accepted species in the genus are presented.

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Acknowledgments

The authors thank O herbarium and D. Dvořák (BRNU) for the loan of collections and Dr. Larissa Trierveiler-Pereira and Dr. Mateus A. Reck for the images of fresh basidiomes. FAPESP (Fundação de Amparo a Pesquisa do Estado de São Paulo, Brazil. Grant number: 2011/17219-0), European Social Fund and the state budget of the Czech Republic (Project Indicators of trees vitality Reg. No. CZ.1.07/2.3.00/20.0265) are acknowledged for financial support.

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Authors and Affiliations

  1. Núcleo de Pesquisa em Micologia, Instituto de Botânica, Av. Miguel Estefano 3687, 04301-90, São Paulo, SP, Brazil

    Mauro C. Westphalen & Adriana M. Gugliotta

  2. Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, CZ-61300, Brno, Czech Republic

    Michal Tomšovský

  3. Área de Protección Forestal, Centro de Investigación y Extensión Forestal Andino Patagónico, C.C. 14, 9200, Esquel, Chubut, Argentina

    Mario Rajchenberg

  4. National Research Council of Argentina (CONICET), Buenos Aires, Argentina

    Mario Rajchenberg

Authors
  1. Mauro C. Westphalen
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  2. Michal Tomšovský
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  3. Mario Rajchenberg
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  4. Adriana M. Gugliotta
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Corresponding author

Correspondence to Mauro C. Westphalen.

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Section Editor: Franz Oberwinkler

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Westphalen, M.C., Tomšovský, M., Rajchenberg, M. et al. Morphological and phylogenetic studies of two new neotropical species of Loweomyces (Polyporales, Basidiomycota). Mycol Progress 15, 967–975 (2016). https://doi.org/10.1007/s11557-016-1223-7

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  • DOI: https://doi.org/10.1007/s11557-016-1223-7

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