Bordered Screw-moss vs Brook Floater

Tortula marginata compared with Alasmidonta varicosa

Key Differences

Bordered Screw-moss is Endangered while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Bordered Screw-moss	Brook Floater
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Mollusca (Mollusks)
Class	Bryopsida (Bryopsida)	Bivalvia (Bivalvia)
Order	Pottiales (Pottiales)	Unionida (Unionida)
Family	Pottiaceae	Unionidae
Genus	Tortula	Alasmidonta
Species	Tortula marginata	Alasmidonta varicosa

Conservation Status

Bordered Screw-moss

EN — Endangered

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Bordered Screw-moss	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bordered Screw-moss

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Distributed across Belgium, Luxembourg, New Zealand, Norway, and Portugal. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

Bordered Screw-moss

The Bordered Screw-moss (Tortula marginata) is a species in the genus Tortula. It is currently classified as Endangered on the IUCN Red List. Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

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.