Brook Floater vs Spiny Threadwort

Alasmidonta varicosa compared with Cephaloziella spinigera

Key Differences

• Brook Floater is Vulnerable while Spiny Threadwort is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Spiny Threadwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Marchantiophyta (liverwort)
Class	Bivalvia (Bivalvia)	Jungermanniopsida (Jungermanniopsida)
Order	Unionida (Unionida)	Jungermanniales (Jungermanniales)
Family	Unionidae	Cephaloziellaceae
Genus	Alasmidonta	Cephaloziella
Species	Alasmidonta varicosa	Cephaloziella spinigera

Conservation Status

Brook Floater

VU — Vulnerable

Spiny Threadwort

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Spiny Threadwort
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.

Spiny Threadwort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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.