Gray-bellied Night Monkey vs Simons’s Mouse Opossum

Aotus lemurinus compared with Marmosa simonsi

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Simons’s Mouse Opossum is Not Evaluated.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Simons’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Primates (Primates)	Didelphimorphia (Didelphimorphia)
Family	Aotidae	Didelphidae
Genus	Aotus	Marmosa
Species	Aotus lemurinus	Marmosa simonsi

Evolutionary Relationship

Gray-bellied Night Monkey and Simons’s Mouse Opossum share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Simons’s Mouse Opossum

NE — Not Evaluated

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Simons’s Mouse Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Gray-bellied Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Simons’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

Shared Countries

Both species can be found in 1 countries:

🇪🇨 Ecuador