Brazilian Gracile Opossum vs Colombian Oldfield Mouse

Gracilinanus microtarsus compared with Thomasomys dispar

Key Differences

• Brazilian Gracile Opossum is Least Concern while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Brazilian Gracile Opossum	Colombian Oldfield Mouse
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class same	Mammalia (포유류)	Mammalia (포유류)
Order	Didelphimorphia (주머니쥐)	Rodentia (설치류)
Family	Didelphidae	Cricetidae
Genus	Gracilinanus	Thomasomys
Species	Gracilinanus microtarsus	Thomasomys dispar

Evolutionary Relationship

Brazilian Gracile Opossum and Colombian Oldfield Mouse share a common ancestor at the Class level: Mammalia. (포유류)

Conservation Status

Brazilian Gracile Opossum

LC — Least Concern

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Brazilian Gracile Opossum	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brazilian Gracile Opossum

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.

Brazilian Gracile Opossum

The Brazilian Gracile Opossum (Gracilinanus microtarsus) is a species in the genus Gracilinanus. 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.