4.6 Article

Steccherinum tenuissimum and S. xanthum spp. nov. (Polyporales, Basidiomycota): New species from China

Journal

PLOS ONE
Volume 16, Issue 1, Pages -

Publisher

PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0244520

Keywords

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Funding

  1. National Natural Science Foundation of China [31700023]
  2. Biodiversity Survey, Observation and Assessment Program (2019-2023) of Ministry of Ecology and Environment of China [1963049]

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Two new wood-inhabiting fungal species, Steccherinum tenuissimum and S. xanthum spp. nov., are described based on a combination of morphological features and molecular evidence; phylogenetic analyses show that they fall into the residual polyporoid clade, with S. tenuissimum and S. xanthum being sister to S. robustius with high support.
Two new wood-inhabiting fungal species, Steccherinum tenuissimum and S. xanthum spp. nov. are described based on a combination of morphological features and molecular evidence. Steccherinum tenuissimum is characterized by an annual growth habit, resupinate basidiomata with an odontioid hymenial surface, a dimitic hyphal system with clamped generative hyphae, strongly encrusted cystidia and basidiospores measuring 3-5 x 2-3.5 mu m. Steccherinum xanthum is characterized by odontioid basidiomata and a monomitic hyphal system with generative hyphae bearing clamp connections and covering by crystals, colourless, thin-walled, smooth, IKI-, CB-and has basidiospores measuring 2.7-5.5 x 1.8-4.0 mu m. Sequences of the ITS and nLSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and Bayesian inference methods. The phylogenetic analyses based on molecular data of ITS + nLSU sequences showed that two new Steccherinum species felled into the residual polyporoid clade. Further investigation was obtained for more representative taxa in Steccherinum based on ITS + nLSU sequences, which demonstrated that S. tenuissimum and S. xanthum were sister to S. robustius with high support (100% BP, 100% BS and 1.00 BPP).

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