Common Fat-tailed Mouse Opossum vs

Thylamys pusillus compared with Orbilia comma

Key Differences

• Common Fat-tailed Mouse Opossum is Least Concern while is Near Threatened.

Taxonomic Classification

Rank	Common Fat-tailed Mouse Opossum
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Mammalia (Mammals)	Orbiliomycetes (Orbiliomycetes)
Order	Didelphimorphia (Didelphimorphia)	Orbiliales (Orbiliales)
Family	Didelphidae	Orbiliaceae
Genus	Thylamys	Orbilia
Species	Thylamys pusillus	Orbilia comma

Conservation Status

Common Fat-tailed Mouse Opossum

LC — Least Concern

NT — Near Threatened

Physical Characteristics

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

Habitat & Geographic Range

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

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.

Orbilia comma is a minute discomycete fungus producing tiny, translucent to pale yellowish cup-shaped fruiting bodies on decaying wood and plant debris in humid forest settings. It belongs to a genus of small, inconspicuous fungi that play a role in decomposing organic material on the forest floor. Near Threatened, its status reflects sensitivity to woodland management changes and habitat loss.