Brook Floater vs Darkface arion

Alasmidonta varicosa compared with Arion distinctus

Key Differences

• Brook Floater is Vulnerable while Darkface arion is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Darkface arion
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Bivalvia (Bivalvia)	Gastropoda (Gastropoda)
Order	Unionida (Unionida)	Stylommatophora (Stylommatophora)
Family	Unionidae	Arionidae
Genus	Alasmidonta	Arion
Species	Alasmidonta varicosa	Arion distinctus

Evolutionary Relationship

Brook Floater and Darkface arion share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

Brook Floater

VU — Vulnerable

Darkface arion

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Darkface arion
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.

Darkface arion

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Widely distributed across Asia (Taiwan), Europe (12 countries), North America (United States), and Oceania and the Pacific (New Zealand).

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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States