Five new species in Piloderma (Atheliales, Basidiomycota) and epitypification of P. byssinum

Abstract

Piloderma constitutes a small genus of soft, corticioid, ectomycorrhizal, widely distributed and mostly very common species. Microscopically, its members have traditionally been recognised by their simple-septate hyphae and by their small, thick-walled, colourless to pale yellow spores. We describe five new species from northern Europe based on molecular and morphological data: P. frondosum sp. nov., P. fugax sp. nov., P. lamprolithum sp. nov., P. luminosum sp. nov. and P. mirabile sp. nov. All the new species, except P. luminosum seem to be more or less rare. Piloderma fugax has a strong preference for old-growth forest - a lifestyle seemingly deviating from the rest of the genus. Piloderma mirabile is a sister species to P. sphaerosporum and the first known species with clamped hyphae. Piloderma lamprolithum is closely related to P. exiguum and distinguished by its large encrusting crystals. Piloderma luminosum is very closely related to, and morphologically semicryptic with, P. byssinum. To clarify its distinction from P. byssinum, an epitype is designated for the latter. Piloderma frondosum also belongs to the P. byssinum cluster and is distinguished by its association to broadleaved trees. An updated key to all Piloderma species is provided.

Keywords

eDNA; Ectomycorrhiza; Cryptic species; Threatened species; Species tree; Key

Published in

Fungal Biology
2025, volume: 129, number: 2, article number: 101531
Publisher: ELSEVIER SCI LTD

SLU Authors

• Lindahl, Björn

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Biological Systematics

Publication identifier

• DOI: https://doi.org/10.1016/j.funbio.2024.101531

Permanent link to this page (URI)

https://res.slu.se/id/publ/140986