Amazonian Marsh Rat vs Humpback smooth hound

Holochilus sciureus compared with Mustelus whitneyi

Key Differences

• Amazonian Marsh Rat is Least Concern while Humpback smooth hound is Critically Endangered.

Taxonomic Classification

Rank	Amazonian Marsh Rat	Humpback smooth hound
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Rodentia (Rodents)	Carcharhiniformes (Ground Sharks)
Family	Cricetidae	Triakidae
Genus	Holochilus	Mustelus
Species	Holochilus sciureus	Mustelus whitneyi

Evolutionary Relationship

Amazonian Marsh Rat and Humpback smooth hound share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Amazonian Marsh Rat

LC — Least Concern

Humpback smooth hound

CR — Critically Endangered

Physical Characteristics

Attribute	Amazonian Marsh Rat	Humpback smooth hound
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Amazonian Marsh Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

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.

Amazonian Marsh Rat

The Amazonian Marsh Rat (Holochilus sciureus) is a species in the genus Holochilus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.