Colombian Oldfield Mouse vs Gulf of California Harbor Porpoise

Thomasomys dispar compared with Phocoena sinus

Key Differences

• Colombian Oldfield Mouse is Data Deficient while Gulf of California Harbor Porpoise is Critically Endangered.

Taxonomic Classification

Rank	Colombian Oldfield Mouse	Gulf of California Harbor Porpoise
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class same	Mammalia (mamíferos)	Mammalia (mamíferos)
Order	Rodentia (Roedores)	Cetacea (Whales & Dolphins)
Family	Cricetidae	Phocoenidae
Genus	Thomasomys	Phocoena
Species	Thomasomys dispar	Phocoena sinus

Evolutionary Relationship

Colombian Oldfield Mouse and Gulf of California Harbor Porpoise share a common ancestor at the Class level: Mammalia. (mamíferos)

Conservation Status

Colombian Oldfield Mouse

DD — Data Deficient

Gulf of California Harbor Porpoise

CR — Critically Endangered

Physical Characteristics

Attribute	Colombian Oldfield Mouse	Gulf of California Harbor Porpoise
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.

Gulf of California Harbor Porpoise

Habitat

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.