Barred eagle ray vs Common Fat-tailed Mouse Opossum

Aetomylaeus asperrimus compared with Thylamys pusillus

Key Differences

• Barred eagle ray is Data Deficient while Common Fat-tailed Mouse Opossum is Least Concern.

Taxonomic Classification

Rank	Barred eagle ray	Common Fat-tailed Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Myliobatiformes (Myliobatiformes)	Didelphimorphia (Didelphimorphia)
Family	Myliobatidae	Didelphidae
Genus	Aetomylaeus	Thylamys
Species	Aetomylaeus asperrimus	Thylamys pusillus

Evolutionary Relationship

Barred eagle ray and Common Fat-tailed Mouse Opossum share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Barred eagle ray

DD — Data Deficient

Common Fat-tailed Mouse Opossum

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Barred eagle ray

Common Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Barred eagle ray

The Barred eagle ray (Aetomylaeus asperrimus) is a species in the genus Aetomylaeus. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment.

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.