Black-Lined Periwinkle vs Common Periwinkle

Littorina saxatilis compared with Littorina littorea

Taxonomic Classification

Rank	Black-Lined Periwinkle	Common Periwinkle
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Mollusca (軟体動物)	Mollusca (軟体動物)
Class same	Gastropoda (腹足綱)	Gastropoda (腹足綱)
Order same	Littorinimorpha (タマキビガイ下目)	Littorinimorpha (タマキビガイ下目)
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

タマキビ（Littorina littorea）はIUCNレッドリストで軽度懸念（LC）に分類されている。分布域全体で広く生息し個体数は安定しており、早急な保全上の懸念はない。

Shared Countries

Both species can be found in 4 countries:

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