Alston s Cotton Rat vs Common Periwinkle

Sigmodon alstoni compared with Littorina littorea

Taxonomic Classification

Rank	Alston s Cotton Rat	Common Periwinkle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Rodentia (Rodents)	Littorinimorpha (Littorinimorpha)
Family	Cricetidae	Littorinidae
Genus	Sigmodon	Littorina
Species	Sigmodon alstoni	Littorina littorea

Evolutionary Relationship

Alston s Cotton Rat and Common Periwinkle share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Alston s Cotton Rat

LC — Least Concern

Common Periwinkle

LC — Least Concern

Physical Characteristics

Attribute	Alston s Cotton Rat	Common Periwinkle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alston s Cotton Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

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).

Alston s Cotton Rat

The Alston s Cotton Rat (Sigmodon alstoni) is a species in the genus Sigmodon. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems. Distributed across Colombia and Venezuela.

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.