Brook Floater vs Simons’s Mouse Opossum

Alasmidonta varicosa compared with Marmosa simonsi

Key Differences

• Brook Floater is Vulnerable while Simons’s Mouse Opossum is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	Simons’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Bivalvia (Bivalvia)	Mammalia (Mammals)
Order	Unionida (Unionida)	Didelphimorphia (Didelphimorphia)
Family	Unionidae	Didelphidae
Genus	Alasmidonta	Marmosa
Species	Alasmidonta varicosa	Marmosa simonsi

Evolutionary Relationship

Brook Floater and Simons’s Mouse Opossum share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Simons’s Mouse Opossum

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	Simons’s Mouse Opossum
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.

Simons’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

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.