Black Lichen vs Brook Floater

Lichina pygmaea compared with Alasmidonta varicosa

Key Differences

• Black Lichen is Extinct while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Black Lichen	Brook Floater
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Mollusca (Mollusks)
Class	Lichinomycetes (Lichinomycetes)	Bivalvia (Bivalvia)
Order	Lichinales (Lichinales)	Unionida (Unionida)
Family	Lichinaceae	Unionidae
Genus	Lichina	Alasmidonta
Species	Lichina pygmaea	Alasmidonta varicosa

Conservation Status

Black Lichen

EX — Extinct

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Black Lichen	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Lichen

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, 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.

Black Lichen

The Black Lichen (Lichina pygmaea) is a species in the genus Lichina. It is currently classified as Extinct on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region. Its geographic range spans Distributed across Denmark, Norway, Portugal, 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.