Beard Lichen vs common grey sea slug

Usnea subscabrosa compared with Aeolidia papillosa

Key Differences

• Beard Lichen is Not Evaluated while common grey sea slug is Least Concern.

Taxonomic Classification

Rank	Beard Lichen	common grey sea slug
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Mollusca (Mollusks)
Class	Lecanoromycetes (Lecanoromycetes)	Gastropoda (Gastropoda)
Order	Lecanorales (Lecanorales)	Nudibranchia (Nudibranchia)
Family	Parmeliaceae	Aeolidiidae
Genus	Usnea	Aeolidia
Species	Usnea subscabrosa	Aeolidia papillosa

Conservation Status

Beard Lichen

NE — Not Evaluated

common grey sea slug

LC — Least Concern

Physical Characteristics

Attribute	Beard Lichen	common grey sea slug
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Beard Lichen

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Portugal, and United States.

common grey sea slug

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Chile, Denmark, Norway, and Sweden.

Beard Lichen

The Beard Lichen (Usnea subscabrosa) is a species in the genus Usnea. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

common grey sea slug

<em>Aeolidia papillosa</em>, commonly known as the common grey sea slug, is a nudibranch mollusc belonging to the genus Aeolidia within the family Aeolidiidae. Despite the species name referencing terrestrial and aquatic habitats including forests and freshwater, <em>Aeolidia papillosa</em> is primarily a marine organism. Its range includes Belgium, Chile, Denmark, Norway, and Sweden, indicating a distribution across the North Atlantic and into South American waters. Common grey sea slug is assessed as Least Concern on the IUCN Red List. The species is typically found in intertidal and subtidal zones, where it preys on sea anemones and stores stinging cells from its prey in its dorsal cerata for defense. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway