Buff-marked Neb vs Colombian Oldfield Mouse

Monochroa lucidella compared with Thomasomys dispar

Key Differences

• Buff-marked Neb is Near Threatened while Colombian Oldfield Mouse is Data Deficient.

Taxonomic Classification

Rank	Buff-marked Neb	Colombian Oldfield Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Lepidoptera (Butterflies & Moths)	Rodentia (Rodents)
Family	Gelechiidae	Cricetidae
Genus	Monochroa	Thomasomys
Species	Monochroa lucidella	Thomasomys dispar

Evolutionary Relationship

Buff-marked Neb and Colombian Oldfield Mouse share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Buff-marked Neb

NT — Near Threatened

Colombian Oldfield Mouse

DD — Data Deficient

Physical Characteristics

Attribute	Buff-marked Neb	Colombian Oldfield Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Buff-marked Neb

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Colombian Oldfield Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Colombia.

Buff-marked Neb

The Buff-Marked Neb (Monochroa lucidella) is a species in the genus Monochroa. It is currently classified as Near Threatened on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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.