Black-capped Squirrel Monkey vs Colombian Oldfield Mouse

Saimiri boliviensis compared with Thomasomys dispar

Key Differences

• Black-capped Squirrel Monkey is Least Concern while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Black-capped Squirrel Monkey	Colombian Oldfield 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	Cebidae	Cricetidae
Genus	Saimiri	Thomasomys
Species	Saimiri boliviensis	Thomasomys dispar

Evolutionary Relationship

Black-capped Squirrel Monkey and Colombian Oldfield Mouse share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Black-capped Squirrel Monkey

LC — Least Concern

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Black-capped Squirrel Monkey	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-capped Squirrel Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Black-capped Squirrel Monkey

The Black-capped Squirrel Monkey (Saimiri boliviensis) is a species in the genus Saimiri. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Colombian Oldfield Mouse

<em>Thomasomys dispar</em>, commonly known as the Colombian Oldfield Mouse, is a small rodent species belonging to the genus <em>Thomasomys</em> within the family Cricetidae. This species is classified as Data Deficient, indicating that insufficient information is currently available to evaluate its conservation status with confidence. It has been documented in Colombia, where it inhabits diverse terrestrial and aquatic-adjacent environments. Members of the genus <em>Thomasomys</em> are typically associated with high-altitude Andean habitats, including páramo grasslands, shrublands, and montane forest edges, where they occupy ground-level microhabitats and burrow in soft soils. These mice are generally omnivorous, consuming seeds, plant material, and invertebrates, though specific dietary data for <em>Thomasomys dispar</em> have not been recorded. Biological traits of this species remain poorly documented in the scientific literature. The Data Deficient classification highlights the need for targeted surveys in Colombian Andean regions to determine population size, distribution, and the ecological requirements of this poorly known rodent.