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Discovery of New Intracellular Pathogens by Amoebal Coculture and Amoebal Enrichment Approaches
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Two new species of

Qiu-Yue Zhang1, Hong-Gao Liu2, Lu-Sen Bian1,3

  • 1Institute of Microbiology, School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China.

Frontiers in Cellular and Infection Microbiology
|June 7, 2023
PubMed
Summary
This summary is machine-generated.

Two new fungal species, Scytinostroma acystidiatum and Scytinostroma macrospermum, were discovered in southwest China. Phylogenetic analysis confirms their distinct lineages and unique morphological characteristics within the Scytinostroma genus.

Keywords:
Peniophoraceaenew taxaphylogenytaxonomywood-rotting fungi

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Area of Science:

  • Mycology
  • Plant Pathology
  • Biodiversity

Background:

  • The genus Scytinostroma comprises corticioid fungi known for their resupinate basidiomata.
  • Accurate species identification and phylogenetic placement are crucial for understanding fungal diversity and ecological roles.

Purpose of the Study:

  • To describe and formally introduce two new species of Scytinostroma from southwest China.
  • To investigate the phylogenetic relationships of these new species using molecular data.
  • To provide detailed morphological characterization differentiating them from known congeners.

Main Methods:

  • Morphological examination of fungal specimens, including macroscopic and microscopic features.
  • DNA extraction, PCR amplification, and sequencing of the Internal Transcribed Spacer (ITS) and large subunit (nLSU) ribosomal RNA genes.
  • Phylogenetic analyses using the combined ITS + nLSU dataset to infer evolutionary relationships.

Main Results:

  • Two new species, Scytinostroma acystidiatum and Scytinostroma macrospermum, are described based on distinct morphological traits and molecular data.
  • Phylogenetic analyses revealed that both species form independent lineages, separate from existing Scytinostroma species.
  • S. acystidiatum is characterized by the absence of cystidia and amyloid basidiospores (4.7–7 × 3.5–4.7 μm), while S. macrospermum possesses numerous cystidia and inamyloid basidiospores (9–11 × 4.5–5.5 μm).

Conclusions:

  • The discovery of S. acystidiatum and S. macrospermum expands the known diversity of the genus Scytinostroma.
  • Morphological and molecular data support the distinct species status of these newly described fungi.
  • Further research on the ecological distribution and function of these species is warranted.