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<p>During a survey of macrofungal germplasm resources in northeast Yunnan Province of China, three <i>Sparassis</i>-like specimens were collected from a deciduous secondary broadleaf forest dominated by <i>Quercus</i> spp. Pure cultures were obtained from fresh ascomata using tissue isolation. Morphological observations revealed large <i>Sparassis</i>-like clusters of broad, brown, flabellum-like apothecia; cylindric-clavate asci with a hemiamyloid apical ring of <i>Sclerotinia</i>-type; oblong to cylindrical-ellipsoid, biguttulate ascospores; and two types of paraphyses. Phylogenetic analyses of the combined internal transcribed spacer (ITS) and the large ribosomal subunit (LSU) nuclear ribosomal DNA (rDNA) sequences using maximum likelihood and Bayesian inference methods revealed a well-supported monophyletic clade within the sclerotiniaceous lineage of <i>Helotiales</i>. Based on these results, we propose <i>Pseudosparassis yunnanensis</i> as a new genus and species within this lineage. Its supported placement in a clade with <i>Martininia</i> and <i>Ciboria</i> suggests assignment in <i>Sclerotiniaceae</i>.</p>

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Pseudosparassis yunnanensis, gen. et sp. nov. (Sclerotiniaceae, Helotiales, Ascomycota) from Yunnan Province, Southwestern China

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Yuan-Hao Ma,
  • Qi Zhao,
  • Li-Mei Huang,
  • Ping Liu,
  • Hong-Mei Chai,
  • Yong-Chang Zhao,
  • Hong-Li Su,
  • Ishika Bera,
  • Wei-Min Chen

摘要

During a survey of macrofungal germplasm resources in northeast Yunnan Province of China, three Sparassis-like specimens were collected from a deciduous secondary broadleaf forest dominated by Quercus spp. Pure cultures were obtained from fresh ascomata using tissue isolation. Morphological observations revealed large Sparassis-like clusters of broad, brown, flabellum-like apothecia; cylindric-clavate asci with a hemiamyloid apical ring of Sclerotinia-type; oblong to cylindrical-ellipsoid, biguttulate ascospores; and two types of paraphyses. Phylogenetic analyses of the combined internal transcribed spacer (ITS) and the large ribosomal subunit (LSU) nuclear ribosomal DNA (rDNA) sequences using maximum likelihood and Bayesian inference methods revealed a well-supported monophyletic clade within the sclerotiniaceous lineage of Helotiales. Based on these results, we propose Pseudosparassis yunnanensis as a new genus and species within this lineage. Its supported placement in a clade with Martininia and Ciboria suggests assignment in Sclerotiniaceae.