Onaga-ei vs Dwarf black stingray

Hemitrygon bennettii compared with Hemitrygon parvonigra

Key Differences

• Onaga-ei is Vulnerable while Dwarf black stingray is Data Deficient.

Taxonomic Classification

Rank	Onaga-ei	Dwarf black stingray
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Elasmobranchii	Elasmobranchii
Order same	Myliobatiformes (トビエイ目)	Myliobatiformes (トビエイ目)
Family same	Dasyatidae	Dasyatidae
Genus same	Hemitrygon	Hemitrygon
Species	Hemitrygon bennettii	Hemitrygon parvonigra

Evolutionary Relationship

Onaga-ei and Dwarf black stingray share a common ancestor at the Genus level: Hemitrygon.

Conservation Status

Onaga-ei

VU — Vulnerable

Dwarf black stingray

DD — Data Deficient

Physical Characteristics

Attribute	Onaga-ei	Dwarf black stingray
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Onaga-ei

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

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

Dwarf black stingray

Onaga-ei

The Bennett's cowtail (Hemitrygon bennettii) is a species in the genus Hemitrygon. It is currently classified as Vulnerable on the IUCN Red List. Native to Asia, inhabiting ecosystems characteristic of the region.