Dwarf round ray vs Northern Right Whale Dolphin

Urotrygon nana compared with Lissodelphis borealis

Key Differences

• Dwarf round ray is Near Threatened while Northern Right Whale Dolphin is Least Concern.

Taxonomic Classification

Rank	Dwarf round ray	Northern Right Whale Dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Myliobatiformes (Myliobatiformes)	Cetacea (Whales & Dolphins)
Family	Urotrygonidae	Delphinidae (Oceanic Dolphins)
Genus	Urotrygon	Lissodelphis
Species	Urotrygon nana	Lissodelphis borealis

Evolutionary Relationship

Dwarf round ray and Northern Right Whale Dolphin share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Dwarf round ray

NT — Near Threatened

Northern Right Whale Dolphin

LC — Least Concern

Physical Characteristics

Attribute	Dwarf round ray	Northern Right Whale Dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Dwarf round ray

Northern Right Whale Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.