Taxonomy and phylogeny of the basidiomycetous hyphomycete genus Hormomyces
- Author: mycolabadmin
- 2021-02-12
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Summary
This research clarifies the classification of a poorly understood group of fungi by showing that the genus Hormomyces actually belongs to a different family than previously thought. Using DNA analysis and microscopic examination, the researchers discovered that these fungi are related to orchid root symbionts rather than jelly fungi as was long believed. This discovery impacts everyday life in several ways:
• Improves our understanding of fungal diversity and classification systems
• Helps identify potential new symbiotic relationships between fungi and plants
• Contributes to knowledge about fungi that may be important for orchid conservation
• Provides better tools for identifying these fungi in environmental samples
• May lead to discoveries about their role in plant health and ecosystem function
Background
The taxonomy of the genus Hormomyces, typified by Hormomyces aurantiacus, was long assumed to be the hyphomycetous asexual morph of Tremella mesenterica or occasionally Dacrymyces. The genus was rarely mentioned in modern taxonomic literature and its classification remained uncertain.
Objective
To revise the taxonomy of Hormomyces and clarify its phylogenetic relationships through morphological studies of specimens and molecular phylogenetic analysis of cultures.
Results
Phylogenetic analyses revealed that Hormomyces is synonymous with Tulasnella (Cantharellales, Agaricomycetes) rather than Tremella or Dacrymyces. The type species H. aurantiacus was found to produce conidial chains similar to monilioid cells of asexual morphs of Tulasnella species formerly referred to as Epulorhiza. H. callorioides and H. fragiformis were determined to be conspecific with H. aurantiacus while other described species were found to be unrelated to Tulasnella.
Conclusion
The genus Hormomyces is congeneric with Tulasnella, and the new combination Tulasnella aurantiaca is proposed. The species is redescribed and illustrated, with its ecological niche and possible relationship to orchid root endophytes discussed. This revision clarifies the taxonomy and phylogenetic placement of this poorly understood genus.
- Published in:Fungal Systematics and Evolution,
- Study Type:Taxonomic Study,
- Source: 10.3114/fuse.2021.07.09