Ecuadorian Cotton Rat vs St. James' shell

Sigmodon inopinatus compared with Pecten maximus

Key Differences

• Ecuadorian Cotton Rat is Vulnerable while St. James' shell is Least Concern.

Taxonomic Classification

Rank	Ecuadorian Cotton Rat	St. James' shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Rodentia (Rodents)	Pectinida (Pectinida)
Family	Cricetidae	Pectinidae
Genus	Sigmodon	Pecten
Species	Sigmodon inopinatus	Pecten maximus

Evolutionary Relationship

Ecuadorian Cotton Rat and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Ecuadorian Cotton Rat

VU — Vulnerable

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Ecuadorian Cotton Rat	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ecuadorian Cotton Rat

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.

St. James' shell

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (China), Europe (8 countries), and South America (Chile).

St. James' shell

St. James' shell (Pecten maximus) 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.