Ojiro-ei vs Harmless Serotine

Urogymnus granulatus compared with Eptesicus innoxius

Key Differences

• Ojiro-ei is Vulnerable while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	Ojiro-ei	Harmless Serotine
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Elasmobranchii	Mammalia (哺乳類)
Order	Myliobatiformes (トビエイ目)	Chiroptera (翼手目)
Family	Dasyatidae	Vespertilionidae
Genus	Urogymnus	Eptesicus
Species	Urogymnus granulatus	Eptesicus innoxius

Evolutionary Relationship

Ojiro-ei and Harmless Serotine share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Ojiro-ei

VU — Vulnerable

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	Ojiro-ei	Harmless Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ojiro-ei

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Ojiro-ei

The coachwhip ray, Urogymnus granulatus, is a large elasmobranch in the family Urogymidae found across the Indo-Pacific region, ranging from the Red Sea and East Africa through South and Southeast Asia to northern Australia and the western Pacific islands. It inhabits shallow coastal waters including coral reef flats, sandy lagoons, seagrass beds, and estuarine habitats, where it forages for benthic invertebrates and small fishes buried in the substrate. The coachwhip ray is characterized by an oval disc and a long, whip-like tail with one or more venomous spines at its base, giving the species its common name. The disc reaches up to 1.4 meters in width, making it one of the larger members of its family. Urogymnus granulatus is ovoviviparous, giving birth to live young after internal development, and has low reproductive rates that make populations slow to recover from exploitation. The species is classified as Vulnerable by the IUCN due to significant declines caused by intensive coastal fisheries across its range, particularly in South and Southeast Asia where it is commonly caught as bycatch or targeted for its valuable meat, skin, and gill plates in local markets. Habitat degradation from coastal development and coral reef decline compounds the threat to wild populations.