Brook Floater vs Fierce Orbweaver

Alasmidonta varicosa compared with Araneus saevus

Key Differences

• Brook Floater is Vulnerable while Fierce Orbweaver is Near Threatened.

Taxonomic Classification

Rank	Brook Floater	Fierce Orbweaver
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Mollusca (軟体動物)	Arthropoda (節足動物)
Class	Bivalvia (二枚貝)	Arachnida (クモガタ類)
Order	Unionida (イシガイ目)	Araneae (クモ目)
Family	Unionidae	Araneidae
Genus	Alasmidonta	Araneus
Species	Alasmidonta varicosa	Araneus saevus

Evolutionary Relationship

Brook Floater and Fierce Orbweaver share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

Brook Floater

VU — Vulnerable

Fierce Orbweaver

NT — Near Threatened

Physical Characteristics

Attribute	Brook Floater	Fierce Orbweaver
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.

Fierce Orbweaver

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Distributed across Canada, Norway, Sweden, and United States. 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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States