Black-edged Marble vs Brook Floater

Endothenia nigricostana compared with Alasmidonta varicosa

Key Differences

• Black-edged Marble is Near Threatened while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Black-edged Marble	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Lepidoptera (Butterflies & Moths)	Unionida (Unionida)
Family	Tortricidae	Unionidae
Genus	Endothenia	Alasmidonta
Species	Endothenia nigricostana	Alasmidonta varicosa

Evolutionary Relationship

Black-edged Marble and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Black-edged Marble

NT — Near Threatened

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Black-edged Marble	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-edged Marble

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Black-edged Marble

The Black-edged Marble (Endothenia nigricostana) is a species in the genus Endothenia. It is currently classified as Near Threatened on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats. Distributed across Belgium, Denmark, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.