Bootlace worm vs Brook Floater

Lineus longissimus compared with Alasmidonta varicosa

Key Differences

• Bootlace worm is Not Evaluated while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Bootlace worm	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Nemertea (Nemertea)	Mollusca (Mollusks)
Class	Pilidiophora (Pilidiophora)	Bivalvia (Bivalvia)
Order	Heteronemertea (Heteronemertea)	Unionida (Unionida)
Family	Lineidae	Unionidae
Genus	Lineus	Alasmidonta
Species	Lineus longissimus	Alasmidonta varicosa

Evolutionary Relationship

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

Conservation Status

Bootlace worm

NE — Not Evaluated

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Bootlace worm	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bootlace worm

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, 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.

Bootlace worm

The Bootlace worm (Lineus longissimus) is a species in the genus Lineus. 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.