Angular rough shark vs Complex-toothed Flying Squirrel

Oxynotus centrina compared with Trogopterus xanthipes

Key Differences

• Angular rough shark is Not Evaluated while Complex-toothed Flying Squirrel is Near Threatened.

Taxonomic Classification

Rank	Angular rough shark	Complex-toothed Flying Squirrel
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	Squaliformes (ツノザメ目)	Rodentia (ネズミ目)
Family	Oxynotidae	Sciuridae (Squirrels)
Genus	Oxynotus	Trogopterus
Species	Oxynotus centrina	Trogopterus xanthipes

Evolutionary Relationship

Angular rough shark and Complex-toothed Flying Squirrel share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Angular rough shark

NE — Not Evaluated

Complex-toothed Flying Squirrel

NT — Near Threatened

Physical Characteristics

Attribute	Angular rough shark	Complex-toothed Flying Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Angular rough shark

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Complex-toothed Flying Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Angular rough shark

The Angular rough shark (Oxynotus centrina) is a species in the genus Oxynotus. Native to Europe, inhabiting ecosystems characteristic of the region.

Complex-toothed Flying Squirrel

<em>Trogopterus xanthipes</em>, the complex-toothed flying squirrel, is a medium-sized gliding rodent in the family Pteromyidae endemic to China, where it inhabits montane broadleaf and mixed forests at elevations typically between 1,000 and 2,700 metres in provinces including Sichuan, Yunnan, Guizhou, Hubei, and neighbouring regions. This species is the sole member of the genus Trogopterus and is distinguished by complex tooth morphology compared to other flying squirrels. Like all flying squirrels, it possesses a patagium — a gliding membrane stretching between fore and hind limbs — that enables it to glide between trees rather than undertake powered flight. The complex-toothed flying squirrel is nocturnal and arboreal, spending its days sheltering in tree hollows and foraging at night for leaves, bark, seeds, and fungi. Its faeces, known as Wuflingzhi, have been used in traditional Chinese medicine for centuries, leading to trapping pressure in parts of its range. The IUCN classifies this species as Near Threatened, reflecting population decline driven by overhunting for medicinal use and ongoing habitat loss from logging and agricultural encroachment in montane forests. Biological traits including average body mass, lifespan, litter size, and home range are partially documented but detailed population estimates are limited. Conservation measures include legal protections under Chinese wildlife law.