Colombian Oldfield Mouse vs Hooked Smudge

Thomasomys dispar compared with Ypsolopha nemorella

Key Differences

• Colombian Oldfield Mouse is Data Deficient while Hooked Smudge is Least Concern.

Taxonomic Classification

Rank	Colombian Oldfield Mouse	Hooked Smudge
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum	Chordata (脊索动物门)	Arthropoda (节肢动物门)
Class	Mammalia (哺乳動物)	Insecta (昆蟲綱)
Order	Rodentia (啮齿目)	Lepidoptera (鱗翅目)
Family	Cricetidae	Ypsolophidae
Genus	Thomasomys	Ypsolopha
Species	Thomasomys dispar	Ypsolopha nemorella

Evolutionary Relationship

Colombian Oldfield Mouse and Hooked Smudge share a common ancestor at the Kingdom level: Animalia. (动物界)

Conservation Status

Colombian Oldfield Mouse

DD — Data Deficient

Hooked Smudge

LC — Least Concern

Physical Characteristics

Attribute	Colombian Oldfield Mouse	Hooked Smudge
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Hooked Smudge

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.