Brook Floater vs cut surfclam

Alasmidonta varicosa compared with Spisula subtruncata

Key Differences

• Brook Floater is Vulnerable while cut surfclam is Least Concern.

Taxonomic Classification

Rank	Brook Floater	cut surfclam
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class same	Bivalvia (Bivalvia)	Bivalvia (Bivalvia)
Order	Unionida (Unionida)	Venerida (Venerida)
Family	Unionidae	Mactridae
Genus	Alasmidonta	Spisula
Species	Alasmidonta varicosa	Spisula subtruncata

Evolutionary Relationship

Brook Floater and cut surfclam share a common ancestor at the Class level: Bivalvia. (Bivalvia)

Conservation Status

Brook Floater

VU — Vulnerable

cut surfclam

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	cut surfclam
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.

cut surfclam

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.