Gray-bellied Night Monkey vs Lesser Pencil-tailed Tree Mouse

Aotus lemurinus compared with Chiropodomys pusillus

Key Differences

• Gray-bellied Night Monkey is Vulnerable while Lesser Pencil-tailed Tree Mouse is Data Deficient.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	Lesser Pencil-tailed Tree Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Primates (Primates)	Rodentia (Rodents)
Family	Aotidae	Muridae (Mice & Rats)
Genus	Aotus	Chiropodomys
Species	Aotus lemurinus	Chiropodomys pusillus

Evolutionary Relationship

Gray-bellied Night Monkey and Lesser Pencil-tailed Tree Mouse share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

Lesser Pencil-tailed Tree Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Gray-bellied Night Monkey	Lesser Pencil-tailed Tree Mouse
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.

Lesser Pencil-tailed Tree Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.