Fatspine spurdog vs Pacific Spiny-rat

Squalus crassispinus compared with Proechimys decumanus

Key Differences

• Fatspine spurdog is Least Concern while Pacific Spiny-rat is Near Threatened.

Taxonomic Classification

Rank	Fatspine spurdog	Pacific Spiny-rat
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Squaliformes (Squaliformes)	Rodentia (Rodents)
Family	Squalidae	Echimyidae
Genus	Squalus	Proechimys
Species	Squalus crassispinus	Proechimys decumanus

Evolutionary Relationship

Fatspine spurdog and Pacific Spiny-rat share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Fatspine spurdog

LC — Least Concern

Pacific Spiny-rat

NT — Near Threatened

Physical Characteristics

Attribute	Fatspine spurdog	Pacific Spiny-rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Fatspine spurdog

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.