Broken Ridge Skate vs Oso Polar

Notoraja lira compared with Ursus maritimus

Key Differences

• Broken Ridge Skate is Data Deficient while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Broken Ridge Skate	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Elasmobranchii	Mammalia (mamíferos)
Order	Rajiformes (Rajiformes)	Carnivora (carnívoros)
Family	Arhynchobatidae	Ursidae (Bears)
Genus	Notoraja	Ursus (Bears)
Species	Notoraja lira	Ursus maritimus

Evolutionary Relationship

Broken Ridge Skate and Oso Polar share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Broken Ridge Skate

DD — Data Deficient

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Broken Ridge Skate	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Broken Ridge Skate

Oso Polar

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Broken Ridge Skate

The Broken Ridge Skate (Notoraja lira) is a species in the genus Notoraja. It is currently classified as Data Deficient on the IUCN Red List. This species is recognized for its ecological significance within its native range.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.