Black-Lined Periwinkle vs Caucasian Alder

Littorina saxatilis compared with Alnus subcordata

Taxonomic Classification

Rank	Black-Lined Periwinkle	Caucasian Alder
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Magnoliophyta (Flowering Plants)
Class	Gastropoda (Gastropoda)	Magnoliopsida (Dicots)
Order	Littorinimorpha (Littorinimorpha)	Fagales (Beeches & Oaks)
Family	Littorinidae	Betulaceae
Genus	Littorina	Alnus
Species	Littorina saxatilis	Alnus subcordata

Conservation Status

Black-Lined Periwinkle

LC — Least Concern

Caucasian Alder

LC — Least Concern

Physical Characteristics

Attribute	Black-Lined Periwinkle	Caucasian Alder
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).

Caucasian Alder

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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.

Caucasian Alder

The Caucasian Alder (Alnus subcordata) is a species in the genus Alnus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.