Pycnoporellus alboluteus
CR

Pycnoporellus alboluteus

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Pycnoporellus_alboluteus

Overview

Pycnoporellus alboluteus, commonly known as the orange sponge polypore, is a species of polypore fungus in the family Fomitopsidaceae. The soft, spongy orange fruit bodies grow spread out on the surface of fallen logs. Mature specimens have tooth-like or jagged pore edges.

Pycnoporellus alboluteus faces severe threats from widespread deforestation and habitat fragmentation across its range, particularly affecting old-growth forest ecosystems essential for its survival. Climate change is altering forest composition and moisture regimes, while logging activities remove the large dead trees this fungus requires as substrate.

Threat summary

Habitat

Old-growth coniferous and mixed forests, particularly on dead or dying trees of spruce, fir, and pine species in temperate and boreal regions. Requires specific moisture conditions and substrate characteristics found in mature forest ecosystems with substantial deadwood components.

TERRESTRIAL· major

Other threatened species in Pycnoporellaceae

Pycnoporellus fulgensEN

Pycnoporellus fulgens

Unknown

Frequently asked questions

Why is Pycnoporellus alboluteus classified as Critically Endangered?
Pycnoporellus alboluteus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Pycnoporellus alboluteus faces severe threats from widespread deforestation and habitat fragmentation across its range, particularly affecting old-growth forest ecosystems essential for its survival. Climate change is altering forest composition and moisture regimes, while logging activities remove the large dead trees this fungus requires as substrate.
Where does Pycnoporellus alboluteus live?
Pycnoporellus alboluteus occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Pycnoporellus alboluteus?
The main threats to Pycnoporellus alboluteus are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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