Brook Floater vs rounded rustwort

Alasmidonta varicosa compared with Marsupella sparsifolia

Key Differences

• Brook Floater is Vulnerable while rounded rustwort is Least Concern.

Taxonomic Classification

Rank	Brook Floater	rounded rustwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Marchantiophyta (liverwort)
Class	Bivalvia (Bivalvia)	Jungermanniopsida (Jungermanniopsida)
Order	Unionida (Unionida)	Jungermanniales (Jungermanniales)
Family	Unionidae	Gymnomitriaceae
Genus	Alasmidonta	Marsupella
Species	Alasmidonta varicosa	Marsupella sparsifolia

Conservation Status

Brook Floater

VU — Vulnerable

rounded rustwort

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	rounded rustwort
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.

rounded rustwort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Portugal, 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.