Andersson's arctic moss vs Common Periwinkle

Arctoa anderssonii compared with Littorina littorea

Key Differences

• Andersson's arctic moss is Endangered while Common Periwinkle is Least Concern.

Taxonomic Classification

Rank	Andersson's arctic moss	Common Periwinkle
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Mollusca (Mollusks)
Class	Bryopsida (Bryopsida)	Gastropoda (Gastropoda)
Order	Dicranales (Dicranales)	Littorinimorpha (Littorinimorpha)
Family	Rhabdoweisiaceae	Littorinidae
Genus	Arctoa	Littorina
Species	Arctoa anderssonii	Littorina littorea

Conservation Status

Andersson's arctic moss

EN — Endangered

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Andersson's arctic moss	Common Periwinkle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Andersson's arctic moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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).

Andersson's arctic moss

The Andersson's arctic moss (Arctoa anderssonii) is a species in the genus Arctoa. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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 2 countries:

🇳🇴 Norway 🇸🇪 Sweden