Cochabamba Akodont vs Northern Gracile Opossum

Akodon siberiae compared with Gracilinanus marica

Key Differences

• Cochabamba Akodont is Near Threatened while Northern Gracile Opossum is Least Concern.

Taxonomic Classification

Rank	Cochabamba Akodont	Northern Gracile Opossum
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Rodentia (ネズミ目)	Didelphimorphia (Didelphimorphia)
Family	Cricetidae	Didelphidae
Genus	Akodon	Gracilinanus
Species	Akodon siberiae	Gracilinanus marica

Evolutionary Relationship

Cochabamba Akodont and Northern Gracile Opossum share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Cochabamba Akodont

NT — Near Threatened

Northern Gracile Opossum

LC — Least Concern

Physical Characteristics

Attribute	Cochabamba Akodont	Northern Gracile Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cochabamba Akodont

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Northern Gracile Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela.

Cochabamba Akodont

The Cochabamba akodont (Akodon siberiae) is a small South American rodent endemic to the Cochabamba department of Bolivia. A member of the speciose genus Akodon — the so-called grass mice — this species inhabits humid montane grasslands and shrublands in the Andes, typically at elevations between 2,500 and 3,800 metres. Like other akodont rodents, it is primarily granivorous and insectivorous, foraging among dense grass tussocks and low vegetation for seeds, invertebrates, and plant material. The species is fossorial to a degree, constructing runways and shallow burrows beneath grass cover that provide shelter from predators including raptors and small carnivores. Akodon siberiae was described relatively recently from specimens collected in the Cochabamba region and remains poorly known; much of its ecology and reproductive biology has been inferred from better-studied congeners. Population size estimates are unavailable, though the IUCN classifies it as Near Threatened due to its restricted range and ongoing habitat conversion driven by agricultural expansion, livestock grazing, and burning of Andean grasslands. The species may have some tolerance for modified habitats but its dependence on intact puna and montane scrub makes it vulnerable to continued land-use change. Conservation measures such as protection of remnant native grassland within its limited range are considered important for its long-term persistence.