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New acremonium-like species in the Bionectriaceae and Plectosphaerellaceae

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Abstract

Several molecular studies have demonstrated that species traditionally assigned to the form genus Acremonium are polyphyletic, while Acremonium sensu stricto is a central element of the family Bionectriaceae (Hypocreales). Based on phenotypic characters and molecular phylogenetic analyses, two new Acremonium species, A. moniliforme and A. dimorphosporum, are described. The former is related to Emericellopsis and is characterised by cylindrical conidia, acicular phialides and abundantly formed moniliform hyphae. Acremonium dimorphosporum resembles A. borodinense. It produces dimorphic conidia that are either cylindrical and smooth-walled or ellipsoidal and rough-walled. The new genus Brunneomyces is proposed based on three species, including B. brunnescens (formerly A. brunnescens), B. europaeus and B. hominis. They are characterised by brown hyphae, sympodial conidiophores and chains of ovoidal to ellipsoidal conidia. Chordomyces albus sp. nov. is characterized by its light-coloured colonies, simple or branched conidiophores, phialides with percurrent proliferations and cylindrical collarettes, and ellipsoidal to cylindrical conidia. The combined analysis of the LSU, ITS, RPB2 and TEF1-α loci supports the inclusion of B. brunnescens, B. europaeus, B. hominis and C. albus in Plectosphaerellaceae.

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Acknowledgements

The authors would like to thank Prof. Dr, G.S. de Hoog and the curator of the CBS-KNAW Fungal Biodiversity Centre culture collection for providing valuable strains from their collection. This study was supported by the Spanish Ministerio de Economía, Industria y Competitividad, grant CGL2013-43789-P.

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Authors and Affiliations

  1. CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands

    Alejandra Giraldo

  2. Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002, South Africa

    Alejandra Giraldo

  3. Unitat de Micologia, Facultat de Medicina i Ciències de la Salut and IISPV, Universitat Rovira i Virgili, C/ Sant Llorenç 21, 43201, Reus, Tarragona, Spain

    Josepa Gené & Josep Guarro

  4. Fungus Testing Laboratory, University of Texas Health Science Center, San Antonio, Texas, USA

    Deanna A. Sutton & Nathan Wiederhold

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  1. Alejandra Giraldo
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  2. Josepa Gené
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Correspondence to Josepa Gené.

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Section Editor: Hans-Josef Schroers

This article is part of the "Special Issue in honour of the 70th birthday of Dr. Eric McKenzie".

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Giraldo, A., Gené, J., Sutton, D.A. et al. New acremonium-like species in the Bionectriaceae and Plectosphaerellaceae. Mycol Progress 16, 349–368 (2017). https://doi.org/10.1007/s11557-017-1271-7

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  • DOI: https://doi.org/10.1007/s11557-017-1271-7

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