Black-Lined Periwinkle vs Common Periwinkle

Littorina saxatilis compared with Littorina littorea

Taxonomic Classification

Rank	Black-Lined Periwinkle	Common Periwinkle
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Mollusca (软体动物门)	Mollusca (软体动物门)
Class same	Gastropoda (腹足纲)	Gastropoda (腹足纲)
Order same	Littorinimorpha (滨螺形目)	Littorinimorpha (滨螺形目)
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

玉黍螺（Littorina littorea）在IUCN红色名录中被列为无危（LC）。在其分布范围内广泛分布，种群数量稳定，无直接保护威胁。

Shared Countries

Both species can be found in 4 countries:

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