Pacific Spiny-rat vs St. James' shell

Proechimys decumanus compared with Pecten maximus

Key Differences

• Pacific Spiny-rat is Near Threatened while St. James' shell is Least Concern.

Taxonomic Classification

Rank	Pacific Spiny-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	Echimyidae	Pectinidae
Genus	Proechimys	Pecten
Species	Proechimys decumanus	Pecten maximus

Evolutionary Relationship

Pacific Spiny-rat and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Pacific Spiny-rat

NT — Near Threatened

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Pacific Spiny-rat	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Pacific Spiny-rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.