Fatspine spurdog vs Harmless Serotine

Squalus crassispinus compared with Eptesicus innoxius

Key Differences

• Fatspine spurdog is Least Concern while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	Fatspine spurdog	Harmless Serotine
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Squaliformes (Squaliformes)	Chiroptera (Bats)
Family	Squalidae	Vespertilionidae
Genus	Squalus	Eptesicus
Species	Squalus crassispinus	Eptesicus innoxius

Evolutionary Relationship

Fatspine spurdog and Harmless Serotine share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Fatspine spurdog

LC — Least Concern

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	Fatspine spurdog	Harmless Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Fatspine spurdog

Harmless Serotine

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.