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Hebeloma in the Malay Peninsula: Masquerading within Psathyrella
Ursula Eberhardt1, Nicole Schütz1, Henry J Beker2,3,4
1Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191, Stuttgart, Germany.
Mycokeys
|February 8, 2021
Summary
This study revises five fungal species initially described as Psathyrella, reclassifying them into the genus Hebeloma. It confirms the Malay Peninsula as a hotspot for Hebeloma sect. Porphyrospora.
Area of Science:
- Mycology
- Plant Sciences
- Biodiversity Studies
Background:
- Corner described five new species in the genus *Psathyrella* from the Malay Peninsula (1929-1930).
- Three of these species possess characteristics aligning them with *Hebeloma* section *Porphyrospora*.
- This section is defined by vinaceous-colored lamellae and spore prints.
Purpose of the Study:
- To re-evaluate and taxonomically revise five *Psathyrella* species described by Corner.
- To establish the presence and diversity of the genus *Hebeloma* in the Malay Peninsula.
- To formally describe a new species within *Hebeloma* section *Porphyrospora*.
Main Methods:
- Taxonomic revision of fungal specimens.
- Recombination of species names based on morphological characteristics.
- Description of a new species based on collected samples.
Main Results:
- *Psathyrella flavidifolia* is recombined as *Hebeloma flavidifolium*.
- *Psathyrella splendens* and *P. verrucispora* are identified as synonyms of *Hebeloma parvisporum* and *Hebeloma lactariolens*, respectively.
- A new Malayan species, *Hebeloma radicans*, belonging to *H. sect. Porphyrospora*, is described.
Conclusions:
- The western Pacific Rim is confirmed as a diversity hotspot for *Hebeloma* section *Porphyrospora*.
- This study marks the first documented presence of the genus *Hebeloma* and ectomycorrhizal Hymenogastraceae on the Malay Peninsula.
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