Bolivian red howler vs Petit opossum-souris

Alouatta sara compared with Thylamys pusillus

Key Differences

• Bolivian red howler is Near Threatened while Petit opossum-souris is Least Concern.

Taxonomic Classification

Rank	Bolivian red howler	Petit opossum-souris
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (mammifères)	Mammalia (mammifères)
Order	Primates (Primates)	Didelphimorphia (Didelphimorphia)
Family	Atelidae	Didelphidae
Genus	Alouatta	Thylamys
Species	Alouatta sara	Thylamys pusillus

Evolutionary Relationship

Bolivian red howler and Petit opossum-souris share a common ancestor at the Class level: Mammalia. (mammifères)

Conservation Status

Bolivian red howler

NT — Near Threatened

Petit opossum-souris

LC — Least Concern

Physical Characteristics

Attribute	Bolivian red howler	Petit opossum-souris
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bolivian red howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Petit opossum-souris

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Bolivian red howler

The Bolivian red howler (Alouatta sara) is a species in the genus Alouatta. It is currently classified as Near Threatened on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.