Brook Floater vs Fishtail Cup

Alasmidonta varicosa compared with Gyromitra leucoxantha

Key Differences

• Brook Floater is Vulnerable while Fishtail Cup is Critically Endangered.

Taxonomic Classification

Rank	Brook Floater	Fishtail Cup
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Mollusca (Mollusks)	Ascomycota (Sac Fungi)
Class	Bivalvia (Bivalvia)	Pezizomycetes (Pezizomycetes)
Order	Unionida (Unionida)	Pezizales (Pezizales)
Family	Unionidae	Discinaceae
Genus	Alasmidonta	Gyromitra
Species	Alasmidonta varicosa	Gyromitra leucoxantha

Conservation Status

Brook Floater

VU — Vulnerable

Fishtail Cup

CR — Critically Endangered

Physical Characteristics

Attribute	Brook Floater	Fishtail Cup
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.

Fishtail Cup

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

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.