Alder Rollrim vs Brook Floater

Paxillus rubicundulus compared with Alasmidonta varicosa

Key Differences

• Alder Rollrim is Not Evaluated while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Alder Rollrim	Brook Floater
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Mollusca (Mollusks)
Class	Agaricomycetes (Mushrooms)	Bivalvia (Bivalvia)
Order	Boletales (Boletales)	Unionida (Unionida)
Family	Paxillaceae	Unionidae
Genus	Paxillus	Alasmidonta
Species	Paxillus rubicundulus	Alasmidonta varicosa

Conservation Status

Alder Rollrim

NE — Not Evaluated

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Alder Rollrim	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alder Rollrim

Habitat

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

Range

Distributed across Norway and Sweden.

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

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

Alder Rollrim

The Alder Rollrim (Paxillus rubicundulus) is a species in the genus Paxillus. Typically found in forest floors, decomposing wood, and soil ecosystems.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.