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Haploporus (Basidiomycota, Polyporales) in sub-Saharan Africa: Poria eichelbaumii, a long-forgotten name, is reinstated in Haploporus and H. grandisporus sp. nov. is proposed

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Abstract

Poria eichelbaumii, a long-forgotten name, is transferred to Haploporus based on studies of the type specimen, comparison with new collections, and evidences from both morphology and phylogeny. The species is redescribed and illustrated. Haploporus grandisporus is described as new, on the basis of concordant morphological and phylogenetic species concepts. These two species form two very closely related clades within the Haploporus lineage in [28S-ITS]-based phylogenetic inferences. Haploporus eichelbaumii and H. grandisporus are distinguished by the size of their basidiospores (11.5–14.5 × 5.0–6.0 μm, average = 12.7 × 5.8 μm, vs 14–17.5 × 6.0–7.3 μm, average 15.4 × 6.6 μm), the size of their pores (2.5–3.5 / mm, vs 1.5–2.5 / mm), and, likely, divergent autecologies. Although both species occur in montane ecosystems of the eastern African rift, the data so far available suggest they occupy different habitats. Haploporus eichelbaumii has wider distribution, spanning over both branches of the eastern rift, at elevation ~ 1500–2500 masl, in various vegetation types, mostly on small-sized dead branches or twigs, and dead bamboo culms. It is known so far from Kenya, Tanzania, and Malawi to the East, and western Burundi, western Uganda, and Eastern Congo (DRC) in the Albertine mountain ranges. Haploporus grandisporus is known, hitherto, only from the Eastern slopes of Mount Elgon in Kenya, at the timberline, 2900–3200 masl, mostly on dead heather branches (Erica arborea, Ericaceae) in heather thickets. Haploporus nanosporus is currently the third known Haploporus species from tropical Africa, known from the western edge of the Guineo-Congolian rain forest in Gabon and Cameroon. This species is also redescribed and illustrated.

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Data availability

Scientific data concerning DNA sequences and DNA data sets are made available through the platform NCBI and Treebase (cf. accession numbers in the text).

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Acknowledgements

Cony Decock also acknowledges the Research Institute in Tropical Ecology (IRET) of the National Centre of the Scientific Research (CENAREST) of Gabon for facilitating field works in Gabon; the staff of the CNRS Nouragues Research Station in French Guiana for facilitating field work in French Guiana; Prof. R. Courtecuisse, Université de Lille, for his invitation to participate to the survey of polypores in Martinique. The authors also extend their gratitude to the Kenyan Wildlife Service for granting permission to collect at Mount Elgon National Park; the staff at Mount Elgon National Park, particularly Mr. Bonface Masai, for his invaluable help during field work. The authors also warmly thank Mrs. Stéphanie Huret for her help with the sequencing program. Sequences of several specimens from Martinique were kindly provided by Prof. Anne Favel, from the CIRM-CF Fungal collection, INRA, Marseille, to whom we are thankful.

Funding

Funding was provided to Cony Decock by Belgian State–Belgian Federal Science Policy (BELSPO), through the BCCM program; to Cony Decock and Isabel Wagara by the FNRS through an ERAFRICA (project ASAFEM); funding was provided to Cony Decock and Prudence Yombiyeni by the FNRS through a FRFC project (FRFC # 2.4515.06); Funding was provided to Cony Decock and Alphonse Balezi by ARES through the PRD project “Mycologie et développement dans la Région des Grands Lacs: approche raisonnée et filières de production ex-situ de champignons comestibles”.

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Authors and Affiliations

  1. Mycothèque de l’Université catholique de Louvain (BCCM/MUCL), Earth and Life Institute, Université catholique de Louvain, Croix du Sud 2 bte L7.05.06, B-1348, Louvain-la-Neuve, Belgium

    Cony A. Decock

  2. Department of Biological Sciences, Egerton University, P.O BOX 536-20115 Egerton, Nakuru, Kenya

    Isabel Wagara

  3. Faculté des Sciences et Sciences Appliquées, Département de Biologie, Université Officielle de Bukavu, BP 570, Bukavu, République Démocratique du Congo

    Alphonse Balezi

  4. Institut de Recherche en Ecologie Tropicale (IRET, CENAREST), BP-13354 Gros Bouquet, Libreville, Gabon

    Prudence Yombiyeni

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  1. Cony A. Decock
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Contributions

Isabelle Wagara and Cony Decock contributed to the study conception and design. Material collections were performed by all the authors, including Cony Decock, Alphonse Balezi, Prudence Yombiyeni and Isabel Wagara. Data collection and analysis were performed by Cony Decock. The first draft of the manuscript was written by Cony Decock, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Cony A. Decock.

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Decock, C.A., Wagara, I., Balezi, A. et al. Haploporus (Basidiomycota, Polyporales) in sub-Saharan Africa: Poria eichelbaumii, a long-forgotten name, is reinstated in Haploporus and H. grandisporus sp. nov. is proposed. Mycol Progress 20, 149–168 (2021). https://doi.org/10.1007/s11557-020-01660-x

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