Capped Orb Mussel vs Pacific Spiny-rat

Musculium lacustre compared with Proechimys decumanus

Key Differences

• Capped Orb Mussel is Least Concern while Pacific Spiny-rat is Near Threatened.

Taxonomic Classification

Rank	Capped Orb Mussel	Pacific Spiny-rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Bivalvia (Bivalvia)	Mammalia (Mammals)
Order	Sphaeriida (Sphaeriida)	Rodentia (Rodents)
Family	Sphaeriidae	Echimyidae
Genus	Musculium	Proechimys
Species	Musculium lacustre	Proechimys decumanus

Evolutionary Relationship

Capped Orb Mussel and Pacific Spiny-rat share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Capped Orb Mussel

LC — Least Concern

Pacific Spiny-rat

NT — Near Threatened

Physical Characteristics

Attribute	Capped Orb Mussel	Pacific Spiny-rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Capped Orb Mussel

Habitat

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

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.

Capped Orb Mussel

The Capped Orb Mussel (Musculium lacustre) is a species in the genus Musculium. It is currently classified as Least Concern (LC) on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.