Brook Floater vs False widow

Alasmidonta varicosa compared with Steatoda bipunctata

Key Differences

• Brook Floater is Vulnerable while False widow is Least Concern.

Taxonomic Classification

Rank	Brook Floater	False widow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Arthropoda (Arthropods)
Class	Bivalvia (Bivalvia)	Arachnida (Arachnids)
Order	Unionida (Unionida)	Araneae (Araneae)
Family	Unionidae	Theridiidae
Genus	Alasmidonta	Steatoda
Species	Alasmidonta varicosa	Steatoda bipunctata

Evolutionary Relationship

Brook Floater and False widow share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

False widow

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	False widow
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.

False widow

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Found across Europe (4 countries) and North America (Canada, United States).

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