Bear Lentinus vs Fly Agaric

Lentinellus ursinus compared with Amanita muscaria

Taxonomic Classification

Rank	Bear Lentinus	Fly Agaric
Kingdom same	Fungi (Fungi)	Fungi (Fungi)
Phylum same	Basidiomycota (Club Fungi)	Basidiomycota (Club Fungi)
Class same	Agaricomycetes (Mushrooms)	Agaricomycetes (Mushrooms)
Order	Russulales (Russulales)	Agaricales (Gilled Mushrooms)
Family	Auriscalpiaceae	Agaricaceae (Agarics)
Genus	Lentinellus	Amanita (Amanitas)
Species	Lentinellus ursinus	Amanita muscaria

Evolutionary Relationship

Bear Lentinus and Fly Agaric share a common ancestor at the Class level: Agaricomycetes. (Mushrooms)

View Class: Agaricomycetes

Conservation Status

Bear Lentinus

LC — Least Concern

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Bear Lentinus	Fly Agaric
Diet	—	Decomposer
Average Lifespan	—	1 years
Average Length	—	20 cm
Average Weight	—	100 g

Habitat & Geographic Range

Bear Lentinus

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and North America (United States).

Fly Agaric

Habitat

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

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (New Zealand), and South America (Brazil, Chile, Colombia).

Bear Lentinus

The Bear Lentinus (Lentinellus ursinus) is a species in the genus Lentinellus. It is currently classified as Least Concern on the IUCN Red List. Typically found in forest floors, decomposing wood, and soil ecosystems.

Fly Agaric

Among the most iconic and recognizable fungi on Earth, fly agaric mushrooms display striking red caps with white flecked warts across boreal forests of the Northern Hemisphere. Despite their fairy-tale appearance, they contain potent psychoactive compounds including muscimol and ibotenic acid and are moderately toxic. They form critical mycorrhizal symbioses with birch, pine, and spruce trees, exchanging mineral nutrients for carbon and playing essential roles in boreal forest nutrient cycling.