Brook Floater vs Coiban Mastuff Bat

Alasmidonta varicosa compared with Molossus coibensis

Key Differences

• Brook Floater is Vulnerable while Coiban Mastuff Bat is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Coiban Mastuff Bat
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum	Mollusca (Yumuşakçalar)	Chordata (Kordalılar)
Class	Bivalvia (Midyeler)	Mammalia (memeliler)
Order	Unionida (Unionoida)	Chiroptera (yarasa)
Family	Unionidae	Molossidae
Genus	Alasmidonta	Molossus
Species	Alasmidonta varicosa	Molossus coibensis

Evolutionary Relationship

Brook Floater and Coiban Mastuff Bat share a common ancestor at the Kingdom level: Animalia. (hayvan)

Conservation Status

Brook Floater

VU — Vulnerable

Coiban Mastuff Bat

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Coiban Mastuff Bat
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.

Coiban Mastuff Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

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.

Coiban Mastuff Bat

The Coiban Mastuff Bat (Molossus coibensis) is a small free-tailed bat in the family Molossidae, named for Coiba Island off the Pacific coast of Panama, where specimens were first collected. Members of the genus Molossus are robust, fast-flying insectivores adapted to open-air foraging above the forest canopy and over water, characterised by narrow wings and a tail that extends beyond the patagium (wing membrane). Molossus coibensis inhabits lowland tropical forests and adjacent open habitats in Central America and northwestern South America, with confirmed records from Colombia, Ecuador, Venezuela, and Panama, indicating a distributional range that extends well beyond its type locality on Coiba Island. Like other mastiff bats, it roosts in crevices within buildings, rock faces, and hollow trees, emerging at dusk to pursue aerial insects at speed. The species feeds primarily on large beetles, moths, and other night-flying insects, typically hunted high above the forest. It is assessed as Least Concern by the IUCN based on its relatively wide range and tolerance of modified habitats. Molossus coibensis was long treated as a subspecies of Molossus molossus before being recognised as a distinct species based on morphological and molecular evidence. Ecological and life-history data specific to this taxon remain limited.