Fat Guam Partula vs Fly Agaric

Partula gibba compared with Amanita muscaria

Key Differences

• Fat Guam Partula is Critically Endangered while Fly Agaric is Least Concern.

Taxonomic Classification

Rank	Fat Guam Partula	Fly Agaric
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Mollusca (Mollusks)	Basidiomycota (Club Fungi)
Class	Gastropoda (Gastropoda)	Agaricomycetes (Mushrooms)
Order	Stylommatophora (Stylommatophora)	Agaricales (Gilled Mushrooms)
Family	Partulidae	Agaricaceae (Agarics)
Genus	Partula	Amanita (Amanitas)
Species	Partula gibba	Amanita muscaria

Conservation Status

Fat Guam Partula

CR — Critically Endangered

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Fat Guam Partula	Fly Agaric
Diet	—	Decomposer
Average Lifespan	—	1 years
Average Length	—	20 cm
Average Weight	—	100 g

Habitat & Geographic Range

Fat Guam Partula

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Norway and United States. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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).

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.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇺🇸 United States