Cow-nosed ray vs Dusky Dolphin

Rhinoptera bonasus compared with Lagenorhynchus obscurus

Key Differences

• Cow-nosed ray is Vulnerable while Dusky Dolphin is Least Concern.

Taxonomic Classification

Rank	Cow-nosed ray	Dusky Dolphin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Elasmobranchii	Mammalia (Mammals)
Order	Myliobatiformes (Myliobatiformes)	Cetacea (Whales & Dolphins)
Family	Myliobatidae	Delphinidae (Oceanic Dolphins)
Genus	Rhinoptera	Lagenorhynchus
Species	Rhinoptera bonasus	Lagenorhynchus obscurus

Evolutionary Relationship

Cow-nosed ray and Dusky Dolphin share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Cow-nosed ray

VU — Vulnerable

Dusky Dolphin

LC — Least Concern

Physical Characteristics

Attribute	Cow-nosed ray	Dusky Dolphin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cow-nosed ray

Habitat

Native to South America, inhabiting ecosystems characteristic of the region.

Range

Found in Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Dusky Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.