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Hoffmannoscypha, a novel genus of brightly coloured, cupulate Pyronemataceae closely related to Tricharina and Geopora

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Abstract

The rare apothecial, cupulate fungus Geopora pellita (Pyronemataceae) is characterized by a uniquely bright yellow-orange excipulum. We here re-examine its affiliations by use of morphological, molecular phylogenetic and ultrastructural analyses. G. pellita appears as phylogenetically rather isolated, being the sister group of a clade comprising Phaeangium, Picoa, the majority of the Tricharina species, and the remaining Geopora species. Based on its phylogenetic position and its unique combination of morphological characters, we assign G. pellita to Hoffmannoscypha, gen. nov., as H. pellita, comb. nov. As in a previous study, analyses of both large subunit (LSU) and internal transcribed spacer (ITS) ribosomal DNA suggest that the remaining genus Geopora is paraphyletic, with the hypogeous, ptychothecial type species more closely related to Picoa and Phaeangium than to the greyish-brownish cupulate and apothecial Geopora spp., indicating that the latter should be reassigned to the genus Sepultaria. The current study also shows that ITS confirm LSU data regarding the polyphyly of Tricharina.

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Acknowledgments

We kindly thank Dr. Ellen Bloch, New York Botanical Garden Herbarium, for the straightforward loans of Sepultaria pellita (G. pellita) and Tricharina spp. specimens, as well giving permission for nucleic acid extraction from specimens and digitalization of the drawings by G. Massee and F. Seaver (included in the supplementary material). Dr. Dagmar Triebel, Botanische Staatssammlung München, is acknowledged for giving permission for nucleic acid extraction from Tricharina spp. specimens and the kind cooperation.

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Authors and Affiliations

  1. Centraalbureau voor Schimmelcultures, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands

    Benjamin Stielow & Jan Dijksterhuis

  2. Fungarium Gunnar Hensel, Alte Lauchstädter Straße 22, 06217, Merseburg, Germany

    Gunnar Hensel

  3. Pilzberatungsstelle Altkreis Stollberg, Parkstraße 9, 09399, Niederwürschnitz, Germany

    Dirk Strobelt

  4. Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstraße 7b, 38124, Braunschweig, Germany

    Huxley Mae Makonde, Hans-Peter Klenk & Markus Göker

  5. Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany

    Manfred Rohde

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  1. Benjamin Stielow
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  2. Gunnar Hensel
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Correspondence to Markus Göker.

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Stielow, B., Hensel, G., Strobelt, D. et al. Hoffmannoscypha, a novel genus of brightly coloured, cupulate Pyronemataceae closely related to Tricharina and Geopora . Mycol Progress 12, 675–686 (2013). https://doi.org/10.1007/s11557-012-0875-1

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