Brook Floater vs Four-barred Major

Alasmidonta varicosa compared with Oxycera rara

Key Differences

• Brook Floater is Vulnerable while Four-barred Major is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	Four-barred Major
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Arthropoda (Arthropods)
Class	Bivalvia (Bivalvia)	Insecta (Insects)
Order	Unionida (Unionida)	Diptera (Diptera)
Family	Unionidae	Stratiomyidae
Genus	Alasmidonta	Oxycera
Species	Alasmidonta varicosa	Oxycera rara

Evolutionary Relationship

Brook Floater and Four-barred Major share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Four-barred Major

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	Four-barred Major
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.

Four-barred Major

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium and Denmark.

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.