Irrawaddy dolphin vs Simons’s Mouse Opossum

Orcaella brevirostris compared with Marmosa simonsi

Key Differences

• Irrawaddy dolphin is Endangered while Simons’s Mouse Opossum is Not Evaluated.

Taxonomic Classification

Rank	Irrawaddy dolphin	Simons’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Cetacea (Whales & Dolphins)	Didelphimorphia (Didelphimorphia)
Family	Delphinidae (Oceanic Dolphins)	Didelphidae
Genus	Orcaella	Marmosa
Species	Orcaella brevirostris	Marmosa simonsi

Evolutionary Relationship

Irrawaddy dolphin and Simons’s Mouse Opossum share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Irrawaddy dolphin

EN — Endangered

Simons’s Mouse Opossum

NE — Not Evaluated

Physical Characteristics

Attribute	Irrawaddy dolphin	Simons’s Mouse Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Irrawaddy dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Simons’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.