Brook Floater vs

Alasmidonta varicosa compared with Helvella corium

Key Differences

• Brook Floater is Vulnerable while is Least Concern.

Taxonomic Classification

Rank	Brook Floater
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Mollusca (Mollusks)	Ascomycota (Sac Fungi)
Class	Bivalvia (Bivalvia)	Pezizomycetes (Pezizomycetes)
Order	Unionida (Unionida)	Pezizales (Pezizales)
Family	Unionidae	Helvellaceae
Genus	Alasmidonta	Helvella
Species	Alasmidonta varicosa	Helvella corium

Conservation Status

Brook Floater

VU — Vulnerable

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater
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.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Helvella corium is a saddle fungus in the family Helvellaceae, producing irregularly lobed, dark brownish-gray to black apothecia with convoluted, saddle-like caps. It fruits in autumn on soil in broadleaved and mixed woodland, often partially buried in humus or litter. Assessed as Least Concern, this distinctive species is distributed across temperate Europe and North America.