New Yeast‑Like Fungi Discovered in Chinese Provinces

In a recent issue of MycoKeys, researchers reported the discovery of two novel fungal taxa belonging to the genera Tremella and Pseudotremella. The findings were based on isolates obtained from plant materials gathered in Guizhou and Henan provinces, China. These fungi exhibit yeast‑like growth characteristics typical of basidiomycetous yeasts.¹.net]

The study was conducted by a team led by Long Tian, along with Chun‑Yue Chai, Qiu‑Hong Niu, and Feng‑Li Hui. Their work appears in volume 141 of MycoKeys, spanning pages 63 through 76, and carries DOI 10.3897/mycokeys.141.205833.¹.net]

Researchers isolated three basidiomycetous yeast strains directly from plant tissues. They performed detailed phenotypic characterization, assessing colony morphology, pigmentation, and microscopic features such as spore size and shape. In addition, they carried out multilocus phylogenetic analyses that incorporated sequences from the D1/D2 domain of the large subunit rRNA gene (LSU) and the internal transcribed spacer (ITS). This approach allowed them to place the isolates within existing fungal lineages and identify novel species boundaries.¹.net]

Two new species were formally described: Tremella arisaematis sp. nov. and Pseudotremella guizhouensis sp. nov. Both taxa are illustrated in the article, which provides macroscopic and microscopic descriptions, culture characteristics, and comparisons with closely related species. The authors note that T. arisaematis is morphologically similar to T. saccharicola but differs genetically, while P. guizhouensis clusters sister to P. allantoinivorans. These distinctions underscore subtle differences among closely allied taxa.¹.net]

Phylogenetically, the concatenated D1/D2–ITS tree placed T. arisaematis close to T. saccharicola, whereas P. guizhouensis resolved as a sister lineage to P. allantoinivorans. Such relationships suggest that both genera harbor cryptic diversity yet to be fully documented. The study’s findings highlight how even well‑studied groups like Tremella can still yield unexpected discoveries when examined across diverse geographic regions.¹.net]

Beyond adding two names to fungal catalogs, the research emphasizes the importance of sampling plant material from varied Chinese provinces. It also illustrates how modern phylogenetic tools can resolve taxonomic questions that morphology alone cannot answer. This work contributes to ongoing efforts to map global fungal biodiversity and informs conservation strategies for habitats where such organisms thrive.¹.net]