Brown Cobblestone Lichen vs Common Periwinkle

Acarospora fuscata compared with Littorina littorea

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Common Periwinkle
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Mollusca (Mollusks)
Class	Lecanoromycetes (Lecanoromycetes)	Gastropoda (Gastropoda)
Order	Acarosporales (Acarosporales)	Littorinimorpha (Littorinimorpha)
Family	Acarosporaceae	Littorinidae
Genus	Acarospora	Littorina
Species	Acarospora fuscata	Littorina littorea

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Common Periwinkle
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.

Common Periwinkle

Habitat

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

Range

Found across Europe (4 countries) and North America (Canada, United States).

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.

Common Periwinkle

Common Periwinkle (Littorina littorea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇺🇸 United States