Humpback smooth hound vs Long-eared Scaly-tailed Flying Squirrel

Mustelus whitneyi compared with Idiurus macrotis

Key Differences

• Humpback smooth hound is Critically Endangered while Long-eared Scaly-tailed Flying Squirrel is Least Concern.

Taxonomic Classification

Rank	Humpback smooth hound	Long-eared Scaly-tailed Flying Squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Mammalia (Mammals)
Order	Carcharhiniformes (Ground Sharks)	Rodentia (Rodents)
Family	Triakidae	Anomaluridae
Genus	Mustelus	Idiurus
Species	Mustelus whitneyi	Idiurus macrotis

Evolutionary Relationship

Humpback smooth hound and Long-eared Scaly-tailed Flying Squirrel share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Humpback smooth hound

CR — Critically Endangered

Long-eared Scaly-tailed Flying Squirrel

LC — Least Concern

Physical Characteristics

Attribute	Humpback smooth hound	Long-eared Scaly-tailed Flying Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Humpback smooth hound

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Found in Chile. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Long-eared Scaly-tailed Flying Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.