Common Periwinkle vs Flat Periwinkle

Littorina littorea compared with Littorina obtusata

Taxonomic Classification

Rank	Common Periwinkle	Flat Periwinkle
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Mollusca (моллюски)	Mollusca (моллюски)
Class same	Gastropoda (брюхоногие)	Gastropoda (брюхоногие)
Order same	Littorinimorpha (Littorinimorpha)	Littorinimorpha (Littorinimorpha)
Family same	Littorinidae	Littorinidae
Genus same	Littorina	Littorina
Species	Littorina littorea	Littorina obtusata

Evolutionary Relationship

Common Periwinkle and Flat Periwinkle share a common ancestor at the Genus level: Littorina.

Conservation Status

Common Periwinkle

LC — Least Concern

Flat Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Common Periwinkle	Flat Periwinkle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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).

Flat Periwinkle

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden