Broad-barred Knot-horn vs Common Periwinkle

Acrobasis consociella compared with Littorina littorea

Taxonomic Classification

Rank	Broad-barred Knot-horn	Common Periwinkle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Gastropoda (Gastropoda)
Order	Lepidoptera (Butterflies & Moths)	Littorinimorpha (Littorinimorpha)
Family	Pyralidae	Littorinidae
Genus	Acrobasis	Littorina
Species	Acrobasis consociella	Littorina littorea

Evolutionary Relationship

Broad-barred Knot-horn and Common Periwinkle share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Broad-barred Knot-horn

LC — Least Concern

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Broad-barred Knot-horn	Common Periwinkle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Broad-barred Knot-horn

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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).

Broad-barred Knot-horn

The Broad-barred Knot-horn (Acrobasis consociella) is a species in the genus Acrobasis. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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