Brook Floater vs least chink shell

Alasmidonta varicosa compared with Lacuna parva

Key Differences

• Brook Floater is Vulnerable while least chink shell is Data Deficient.

Taxonomic Classification

Rank	Brook Floater	least chink shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Bivalvia (Bivalvia)	Gastropoda (Gastropoda)
Order	Unionida (Unionida)	Littorinimorpha (Littorinimorpha)
Family	Unionidae	Littorinidae
Genus	Alasmidonta	Lacuna
Species	Alasmidonta varicosa	Lacuna parva

Evolutionary Relationship

Brook Floater and least chink shell share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

Brook Floater

VU — Vulnerable

least chink shell

DD — Data Deficient

Physical Characteristics

Attribute	Brook Floater	least chink shell
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.

least chink shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across 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.