Australian thornback skate vs Polar bear

Dentiraja lemprieri compared with Ursus maritimus

Key Differences

• Australian thornback skate is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Australian thornback skate	Polar bear
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Elasmobranchii	Mammalia (mamíferos)
Order	Rajiformes (Rajiformes)	Carnivora (carnívoros)
Family	Rajidae	Ursidae (Bears)
Genus	Dentiraja	Ursus (Bears)
Species	Dentiraja lemprieri	Ursus maritimus

Evolutionary Relationship

Australian thornback skate and Polar bear share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Australian thornback skate

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Australian thornback skate	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Australian thornback skate

Polar bear

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.

Australian thornback skate

The Australian thornback skate (Dentiraja lemprieri) is a species in the genus Dentiraja. It is currently classified as Least Concern on the IUCN Red List. Dentiraja lemprieri contributes to the biodiversity of its native ecosystems.

Polar bear

O maior carnivoro terrestre da Terra, o urso-polar pode ultrapassar 700 kg e e encontrado pelo gelo marinho artico, do Canada ate a Russia. Mamiferos marinhos altamente especializados que dependem do gelo marinho para cacas de focas e focas-barbadas. Excelentes nadadores capazes de percorrer grandes distancias em aguas abertas. Classificado como Vulneravel, com populacoes sob severa pressao devido a rapida perda de gelo marinho artico causada pelas mudancas climaticas.