Brook Floater vs Rock Foam

Alasmidonta varicosa compared with Stereocaulon saxatile

Key Differences

Brook Floater is Vulnerable while Rock Foam is Near Threatened.

Taxonomic Classification

Rank	Brook Floater	Rock Foam
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Mollusca (Mollusks)	Ascomycota (Sac Fungi)
Class	Bivalvia (Bivalvia)	Lecanoromycetes (Lecanoromycetes)
Order	Unionida (Unionida)	Lecanorales (Lecanorales)
Family	Unionidae	Stereocaulaceae
Genus	Alasmidonta	Stereocaulon
Species	Alasmidonta varicosa	Stereocaulon saxatile

Conservation Status

Brook Floater

VU — Vulnerable

Rock Foam

NT — Near Threatened

Physical Characteristics

Attribute	Brook Floater	Rock Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Rock Foam

Habitat

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

Range

Distributed across Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.