Boston facelina vs Brook Floater

Facelina bostoniensis compared with Alasmidonta varicosa

Key Differences

• Boston facelina is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Boston facelina	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Gastropoda (Gastropoda)	Bivalvia (Bivalvia)
Order	Nudibranchia (Nudibranchia)	Unionida (Unionida)
Family	Facelinidae	Unionidae
Genus	Facelina	Alasmidonta
Species	Facelina bostoniensis	Alasmidonta varicosa

Evolutionary Relationship

Boston facelina and Brook Floater share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

Boston facelina

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Boston facelina	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Boston facelina

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

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.

Boston facelina

The Boston Facelina (Facelina bostoniensis) is a species in the genus Facelina. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.