Petit opossum-souris vs Willowherb aphid

Thylamys pusillus compared with Aphis epilobii

Key Differences

• Petit opossum-souris is Least Concern while Willowherb aphid is Not Evaluated.

Taxonomic Classification

Rank	Petit opossum-souris	Willowherb aphid
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Chordata (Chordates)	Arthropoda (arthropodes)
Class	Mammalia (mammifères)	Insecta (insecte)
Order	Didelphimorphia (Didelphimorphia)	Hemiptera (Hemiptera)
Family	Didelphidae	Aphididae
Genus	Thylamys	Aphis
Species	Thylamys pusillus	Aphis epilobii

Evolutionary Relationship

Petit opossum-souris and Willowherb aphid share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

Petit opossum-souris

LC — Least Concern

Willowherb aphid

NE — Not Evaluated

Physical Characteristics

Attribute	Petit opossum-souris	Willowherb aphid
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Petit opossum-souris

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Willowherb aphid

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (5 countries) and North America (United States).

Petit opossum-souris

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.