Brook Floater vs limestone fern

Alasmidonta varicosa compared with Gymnocarpium robertianum

Key Differences

• Brook Floater is Vulnerable while limestone fern is Critically Endangered.

Taxonomic Classification

Rank	Brook Floater	limestone fern
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Tracheophyta
Class	Bivalvia (Bivalvia)	Polypodiopsida (Polypodiopsida)
Order	Unionida (Unionida)	Polypodiales (Polypodiales)
Family	Unionidae	Cystopteridaceae
Genus	Alasmidonta	Gymnocarpium
Species	Alasmidonta varicosa	Gymnocarpium robertianum

Conservation Status

Brook Floater

VU — Vulnerable

limestone fern

CR — Critically Endangered

Physical Characteristics

Attribute	Brook Floater	limestone fern
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.

limestone fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Belgium, Canada, Norway, 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.