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<p>The genus <i>Phaeolus</i> has a cosmopolitan distribution and includes several brown rot fungi capable of causing damaging by tree diseases. Some of them are also regarded important for the formulation of pharmaceutical, biotechnological and food products. This paper describes a new species of <i>Phaeolus</i> named <i>Phaeolus neoschweinitzii</i> sp. nov. with striking morphological similarities to <i>Phaeolus schweinitzii</i>. Fruiting bodies of <i>P. neoschweinitzii</i> sp. nov. were attached to the base and to the lower parts of the trunks of <i>Pinus wallichiana</i>. The new species, although morphologically similar to <i>P. schweinitzii</i>. is characterized by a unique DNA sequence of the internal transcribed spacer (ITS) regions, by sessile basidiomata, ellipsoid to oval-shaped basidiospores (5–6.8 × 3.1–4.5 μm), and by a brown non-laccate pileal surface with blackish-brown margin. The new species is a close relative of the Eurasian <i>P. schweinitzii</i> and like its relative, it causes significant disease of pine trees, by infecting and causing a brown cubicle rot in root systems and butts of living trees as well as in stumps.</p>

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Phaeolus neoschweinitzii sp. nov. causing dieback of Pinus wallichiana

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Aisha Umar,
  • Abdullah Ahmed Al-Ghamdi,
  • Fuad Ameen,
  • Kholoud K. Alzahrani,
  • Matteo Garbelotto,
  • Laurent Dufossé

摘要

The genus Phaeolus has a cosmopolitan distribution and includes several brown rot fungi capable of causing damaging by tree diseases. Some of them are also regarded important for the formulation of pharmaceutical, biotechnological and food products. This paper describes a new species of Phaeolus named Phaeolus neoschweinitzii sp. nov. with striking morphological similarities to Phaeolus schweinitzii. Fruiting bodies of P. neoschweinitzii sp. nov. were attached to the base and to the lower parts of the trunks of Pinus wallichiana. The new species, although morphologically similar to P. schweinitzii. is characterized by a unique DNA sequence of the internal transcribed spacer (ITS) regions, by sessile basidiomata, ellipsoid to oval-shaped basidiospores (5–6.8 × 3.1–4.5 μm), and by a brown non-laccate pileal surface with blackish-brown margin. The new species is a close relative of the Eurasian P. schweinitzii and like its relative, it causes significant disease of pine trees, by infecting and causing a brown cubicle rot in root systems and butts of living trees as well as in stumps.