vs Polar bear

Clitocybe leucodiatreta compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Fungi (真菌界)	Animalia (动物界)
Phylum	Basidiomycota (担子菌门)	Chordata (脊索动物门)
Class	Agaricomycetes (傘菌綱)	Mammalia (哺乳動物)
Order	Agaricales (伞菌目)	Carnivora (食肉目)
Family	Tricholomataceae	Ursidae (Bears)
Genus	Clitocybe	Ursus (Bears)
Species	Clitocybe leucodiatreta	Ursus maritimus

Conservation Status

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute		Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Clitocybe leucodiatreta is a pale agaric fungus in the family Tricholomataceae native to temperate European forests. The species name combines 'leuco' (white) with the related species epithet 'diatreta,' suggesting morphological similarity to Clitocybe diatreta but with a distinctly paler, more whitish appearance. It inhabits deciduous and mixed woodland floors, fruiting in autumn among accumulated leaf litter where it acts as a saprotrophic decomposer of organic matter. The fruiting bodies display the characteristic Clitocybe form: a depressed to funnel-shaped cap, crowded decurrent gills, and a cylindrical stipe. Distinguishing closely related small, pale Clitocybe species requires careful examination of spore morphology, odor, taste, and ecological context, with molecular phylogenetics increasingly used to resolve taxonomic boundaries within this challenging genus. C. leucodiatreta represents part of the remarkable diversity of saprotrophic fungi in European temperate forests, ecosystems where macrofungal diversity rivals that of the plant and invertebrate communities they help sustain through decomposition.