Brown Cobblestone Lichen vs Common Bithynia

Acarospora fuscata compared with Bithynia tentaculata

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Common Bithynia
Kingdom	Fungi (Fungi)	Animalia (animal)
Phylum	Ascomycota (Sac Fungi)	Mollusca (mollusques)
Class	Lecanoromycetes (Lecanoromycetes)	Gastropoda (Gastropoda)
Order	Acarosporales (Acarosporales)	Littorinimorpha (Littorinimorpha)
Family	Acarosporaceae	Bithyniidae
Genus	Acarospora	Bithynia
Species	Acarospora fuscata	Bithynia tentaculata

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Common Bithynia

LC — Least Concern

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Common Bithynia
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 Bithynia

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and 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 Bithynia

The common bithynia (<em>Bithynia tentaculata</em>) is a freshwater gastropod snail belonging to the family Bithyniidae. It is classified as Least Concern on the IUCN Red List and has been recorded across terrestrial and aquatic habitats in Belgium, Denmark, Norway, Sweden, and the United States. <em>Bithynia tentaculata</em> typically inhabits slow-moving or still freshwater environments such as lakes, ponds, canals, and rivers, often on muddy or sandy substrates where organic material is abundant. The species has a distinctive operculum that seals the shell opening, providing protection against desiccation and predators. It typically feeds by grazing on algae, detritus, and biofilms on submerged surfaces. The common bithynia serves as an intermediate host for several trematode parasites, making it ecologically significant in freshwater food webs and parasite life cycles. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇺🇸 United States