Black-Lined Periwinkle vs Common Periwinkle

Littorina saxatilis compared with Littorina littorea

Taxonomic Classification

Rank	Black-Lined Periwinkle	Common Periwinkle
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Mollusca (มอลลัสกา)	Mollusca (มอลลัสกา)
Class same	Gastropoda (ชั้นแกสโทรโพดา)	Gastropoda (ชั้นแกสโทรโพดา)
Order same	Littorinimorpha (Littorinimorpha)	Littorinimorpha (Littorinimorpha)
Family same	Littorinidae	Littorinidae
Genus same	Littorina	Littorina
Species	Littorina saxatilis	Littorina littorea

Evolutionary Relationship

Black-Lined Periwinkle and Common Periwinkle share a common ancestor at the Genus level: Littorina.

Conservation Status

Black-Lined Periwinkle

LC — Least Concern

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Black-Lined Periwinkle	Common Periwinkle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-Lined Periwinkle

Habitat

Found across multiple habitat types including tropical and subtropical grasslands and savannas, flooded grasslands and savannas, and deserts and xeric shrublands within the Afrotropic biogeographic realm.

Range

Widely distributed across Africa (Namibia, South Africa), Europe (5 countries), and North America (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).

Black-Lined Periwinkle

The Black-Lined Periwinkle (Littorina saxatilis) is a species in the genus Littorina. It is currently classified as Least Concern on the IUCN Red List. Found across multiple habitat types including tropical and subtropical grasslands and savannas, flooded grasslands and savannas, and deserts and xeric shrublands within the Afrotropic biogeographic realm.

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:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States