Brown Cobblestone Lichen vs Northern Dusky Slug

Acarospora fuscata compared with Arion fuscus

Key Differences

• Brown Cobblestone Lichen is Least Concern while Northern Dusky Slug is Data Deficient.

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Northern Dusky Slug
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Mollusca (Mollusks)
Class	Lecanoromycetes (Lecanoromycetes)	Gastropoda (Gastropoda)
Order	Acarosporales (Acarosporales)	Stylommatophora (Stylommatophora)
Family	Acarosporaceae	Arionidae
Genus	Acarospora	Arion
Species	Acarospora fuscata	Arion fuscus

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Northern Dusky Slug

DD — Data Deficient

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Northern Dusky Slug
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Cobblestone Lichen

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and United States.

Northern Dusky Slug

Habitat

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

Range

Found across Europe (7 countries).

Brown Cobblestone Lichen

The Brown Cobblestone Lichen (Acarospora fuscata) is a species in the genus Acarospora. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇳🇴 Norway