Tacked Knight
Tricholoma pessundatum
Conservation status data sourced from the IUCN Red List of Threatened Species.
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Tricholoma_pessundatum
Taxonomy & Classification
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Tricholomataceae
Genus
Tricholoma
Tacked Knight belongs to the family Tricholomataceae, order Agaricales, within the Agaricomycetes class.
Species Profile
Species profile data sourced from the IUCN Red List of Threatened Species.
The Tacked Knight faces severe population declines due to widespread habitat destruction from deforestation and agricultural conversion of its specialized forest ecosystems. Climate change is altering the delicate soil chemistry and mycorrhizal relationships essential for this fungus, while pollution from agricultural runoff and industrial activities degrades the pristine conditions it requires for reproduction and survival.
Key Facts
Habitat & Distribution
Mature coniferous and mixed deciduous-coniferous forests with well-developed soil layers and established mycorrhizal networks, typically in temperate regions with specific soil pH and moisture conditions. Forms symbiotic relationships with tree roots in undisturbed forest ecosystems, particularly favoring areas with rich organic matter and stable microclimate conditions.
Threats
IUCN Red List: Critically Endangered
The Tacked Knight faces severe population declines due to widespread habitat destruction from deforestation and agricultural conversion of its specialized forest ecosystems. Climate change is altering the delicate soil chemistry and mycorrhizal relationships essential for this fungus, while pollution from agricultural runoff and industrial activities degrades the pristine conditions it requires for reproduction and survival.
Agricultural pollution and chemical contamination
Climate change affecting soil chemistry and fungal networks
Disruption of mycorrhizal host tree relationships
Habitat loss from deforestation and land conversion
Forest fragmentation reducing viable populations
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Tacked Knight (Tricholoma pessundatum). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/tacked-knight