VU

Mealy Oyster

Ossicaulis lignatilis

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

The Mealy Oyster faces severe pressure from deforestation and habitat fragmentation across its limited range in temperate and boreal forests. Climate change poses an additional threat by altering the moisture and temperature conditions essential for this saprophytic fungus to decompose dead wood effectively. Collection pressure from mycologists and commercial harvesters has intensified in recent years, particularly targeting the distinctive mealy-textured fruiting bodies that give this species its common name.

Threat summary

Habitat

Ossicaulis lignatilis grows exclusively on decaying hardwood logs and stumps in mature temperate and boreal forests, particularly favoring beech, oak, and maple substrates. The species requires specific moisture conditions and partial shade provided by intact forest canopy cover.

TERRESTRIAL· major

Other threatened species in Lyophyllaceae

VU

Lehmfarbener Rasling

Lyophyllum paelochroum

Unknown
Bitterlicher RaslingVU

Bitterlicher Rasling

Lyophyllum amariusculum

Unknown
EN

Obscure Domecap

Calocybe obscurissima

Unknown
EN

Rautensporiger Rasling

Lyophyllum deliberatum

Unknown

Frequently asked questions

Why is Mealy Oyster classified as Vulnerable?
Mealy Oyster is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Mealy Oyster faces severe pressure from deforestation and habitat fragmentation across its limited range in temperate and boreal forests. Climate change poses an additional threat by altering the moisture and temperature conditions essential for this saprophytic fungus to decompose dead wood effectively. Collection pressure from mycologists and commercial harvesters has intensified in recent years, particularly targeting the distinctive mealy-textured fruiting bodies that give this species its common name.
Where does Mealy Oyster live?
Mealy Oyster 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 Mealy Oyster?
The main threats to Mealy Oyster 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.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.