Ecuadorian Cotton Rat vs Mondolfi’s Four-eyed Opossum

Sigmodon inopinatus compared with Philander mondolfii

Key Differences

• Ecuadorian Cotton Rat is Vulnerable while Mondolfi’s Four-eyed Opossum is Least Concern.

Taxonomic Classification

Rank	Ecuadorian Cotton Rat	Mondolfi’s Four-eyed Opossum
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Rodentia (ネズミ目)	Didelphimorphia (Didelphimorphia)
Family	Cricetidae	Didelphidae
Genus	Sigmodon	Philander
Species	Sigmodon inopinatus	Philander mondolfii

Evolutionary Relationship

Ecuadorian Cotton Rat and Mondolfi’s Four-eyed Opossum share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Ecuadorian Cotton Rat

VU — Vulnerable

Mondolfi’s Four-eyed Opossum

LC — Least Concern

Physical Characteristics

Attribute	Ecuadorian Cotton Rat	Mondolfi’s Four-eyed Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ecuadorian Cotton Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

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

Mondolfi’s Four-eyed Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Venezuela.