Common Periwinkle vs Hudson s Thomaomys

Littorina littorea compared with Thomasomys hudsoni

Key Differences

• Common Periwinkle is Least Concern while Hudson s Thomaomys is Vulnerable.

Taxonomic Classification

Rank	Common Periwinkle	Hudson s Thomaomys
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Mammalia (Mammals)
Order	Littorinimorpha (Littorinimorpha)	Rodentia (Rodents)
Family	Littorinidae	Cricetidae
Genus	Littorina	Thomasomys
Species	Littorina littorea	Thomasomys hudsoni

Evolutionary Relationship

Common Periwinkle and Hudson s Thomaomys share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Common Periwinkle

LC — Least Concern

Hudson s Thomaomys

VU — Vulnerable

Physical Characteristics

Attribute	Common Periwinkle	Hudson s Thomaomys
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic 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).

Hudson s Thomaomys

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.