4.2 Article

Contribution to Chaetosphaeriaceae-Kionochaeta setosimplicia sp. nov. from Thailand

Journal

PHYTOTAXA
Volume 508, Issue 2, Pages 175-186

Publisher

MAGNOLIA PRESS
DOI: 10.11646/phytotaxa.508.2.6

Keywords

Asexual morph; Chaetosphaeriales; Freshwater microfungi; Khao Kheow Open Zoo; Microfungi; Systematics

Categories

Funding

  1. National Center for Genetic Engineering and Biotechnology (BIOTEC)
  2. Integrated Technology Platform, NSTDA [P1952580]
  3. HRD program in Biotechnology BIOTEC 2018

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Kionochaeta setosimplicia, a newly discovered saprophytic fungus, shows similarity to but distinct differences from other species of Kionochaeta, and is closely related to other Kionochaeta species within the Chaetosphaeriaceae family. While morphologically resembling Kionochaeta, it exhibits clear genetic differences.
Species of Kionochaeta are saprobes commonly associated with decaying plant materials. As a part of surveys on freshwater microfungi, Kionochaeta-like taxon was found on a submerged decaying twig at a rivulet in the protected forest area of Khao Kheow Open Zoo (KKOZ), eastern Thailand. This taxon is microscopically similar to Kionochaeta, but clearly differs by its accessory lateral setiform branches and sterile setae arising beside the conidiophores. Multi-locus phylogenies inferred from four combined loci (SSU, ITS, LSU and RPB2) demonstrated that this taxon clustered as a unique clade with Kionochaeta species (Chaetosphaeriaceae, Chaetosphaeriales). Therefore, we introduce this taxon as K. setosimplicia, and it is phylogenetically close to K. castaneae, K. ramifera and K. pughii. Kionochaeta setosimplicia is separated from K. microspora and K. spissa. In Kionochaeta clade 1, K. nanophora forms a basal taxon. Kionochaeta ivoriensis forms a distinct Kionochaeta clade 2 distant from other Kionochaeta.

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