Book Flapwort vs Brook Floater

Nardia breidleri compared with Alasmidonta varicosa

Key Differences

• Book Flapwort is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Book Flapwort	Brook Floater
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Mollusca (Mollusks)
Class	Jungermanniopsida (Jungermanniopsida)	Bivalvia (Bivalvia)
Order	Jungermanniales (Jungermanniales)	Unionida (Unionida)
Family	Gymnomitriaceae	Unionidae
Genus	Nardia	Alasmidonta
Species	Nardia breidleri	Alasmidonta varicosa

Conservation Status

Book Flapwort

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Book Flapwort	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Book Flapwort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

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.

Book Flapwort

The Book Flapwort (Nardia breidleri) is a species in the genus Nardia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.