Brook Floater vs Fatspine spurdog

Alasmidonta varicosa compared with Squalus crassispinus

Key Differences

• Brook Floater is Vulnerable while Fatspine spurdog is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Fatspine spurdog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Bivalvia (Bivalvia)	Elasmobranchii
Order	Unionida (Unionida)	Squaliformes (Squaliformes)
Family	Unionidae	Squalidae
Genus	Alasmidonta	Squalus
Species	Alasmidonta varicosa	Squalus crassispinus

Evolutionary Relationship

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

Conservation Status

Brook Floater

VU — Vulnerable

Fatspine spurdog

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Fatspine spurdog
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.

Fatspine spurdog

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.