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<p><i>Lignosus dimiticus</i> is a stipitate, poroid fungus (<i>Basidiomycota</i>, <i>Polyporales</i>) only reported twice from the Democratic Republic of Congo so far. Its systematic position in the typically trimitic genus <i>Lignosus</i> was questionable but did not find a satisfying outcome in recent literature, and no DNA sequence was available either. A recent finding of this species in the Central African Republic could be revised, compared to type collections, and sequenced for ITS and LSU rDNA markers. Phylogenetic analyses revealed that <i>L. dimiticus</i> formed a basal lineage in the <i>Fibroporiaceae</i> (<i>Polyporales</i>). A comparison with specimens of <i>Fibroporia</i> spp. and <i>Pseudofibroporia citrinella</i>, representants of the only two other genera in the family, based on molecular, morphological, and biogeographical features, led to the introduction of a new genus <i>Microporellopsis</i>, and to the new combination <i>M. dimitica</i> to accommodate this species. The characteristics of <i>M. dimitica</i> and relationships between <i>Fibroporia</i>, <i>Microporellopsis</i> gen. nov., and <i>Pseudofibroporia</i> are discussed and illustrated.</p>

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The reassessment of Lignosus dimiticus (Basidiomycota, Polyporales), an enigmatic polypore rediscovered in the Central African Republic, and the new genus Microporellopsis (Fibroporiaceae)

  • 期刊论文

  • 发表日期：

    2025年1月15日

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  • Rellea Yolène Kouagou Yayoro,
  • Sylvain Dumez,
  • Régis Courtecuisse,
  • Cony Decock,
  • Milay Cabarroi-Hernández,
  • Mario Amalfi,
  • Pierre-Arthur Moreau,
  • Stéphane Welti

摘要

Lignosus dimiticus is a stipitate, poroid fungus (Basidiomycota, Polyporales) only reported twice from the Democratic Republic of Congo so far. Its systematic position in the typically trimitic genus Lignosus was questionable but did not find a satisfying outcome in recent literature, and no DNA sequence was available either. A recent finding of this species in the Central African Republic could be revised, compared to type collections, and sequenced for ITS and LSU rDNA markers. Phylogenetic analyses revealed that L. dimiticus formed a basal lineage in the Fibroporiaceae (Polyporales). A comparison with specimens of Fibroporia spp. and Pseudofibroporia citrinella, representants of the only two other genera in the family, based on molecular, morphological, and biogeographical features, led to the introduction of a new genus Microporellopsis, and to the new combination M. dimitica to accommodate this species. The characteristics of M. dimitica and relationships between Fibroporia, Microporellopsis gen. nov., and Pseudofibroporia are discussed and illustrated.