Common Fat-tailed Mouse Opossum vs European pine marten

Thylamys pusillus compared with Martes martes

Key Differences

Common Fat-tailed Mouse Opossum is Least Concern while European pine marten is Critically Endangered.

Taxonomic Classification

Rank	Common Fat-tailed Mouse Opossum	European pine marten
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class same	Mammalia (포유류)	Mammalia (포유류)
Order	Didelphimorphia (주머니쥐)	Carnivora (식육목)
Family	Didelphidae	Mustelidae (Weasels & Otters)
Genus	Thylamys	Martes
Species	Thylamys pusillus	Martes martes

Evolutionary Relationship

Common Fat-tailed Mouse Opossum and European pine marten share a common ancestor at the Class level: Mammalia. (포유류)

보기 Class: Mammalia

Conservation Status

Common Fat-tailed Mouse Opossum

LC — Least Concern

European pine marten

CR — Critically Endangered

Physical Characteristics

Attribute	Common Fat-tailed Mouse Opossum	European pine marten
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

European pine marten

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (6 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Fat-tailed Mouse Opossum

The Common Fat-tailed Mouse Opossum (<em>Thylamys pusillus</em>) is a small marsupial belonging to the genus Thylamys within the family Didelphidae. Like other members of its genus, this species typically stores fat in its tail, which becomes swollen during periods of food abundance and is metabolised during leaner times, a physiological adaptation that provides energy reserves. <em>Thylamys pusillus</em> is generally found in diverse terrestrial and aquatic ecosystems, often in dry woodlands, scrublands, and grassland habitats of South America. The species is assessed as Least Concern on the IUCN Red List, indicating it is not currently considered at risk of extinction. Detailed geographic range data are not available in the current record, but members of this genus are typically distributed across parts of Argentina, Bolivia, Paraguay, and Uruguay. Biological traits including average lifespan, body dimensions, and specific dietary composition remain poorly documented in the scientific literature, though Thylamys species are generally considered omnivorous, often consuming insects, small vertebrates, and plant material.