Polar bear vs

Ursus maritimus compared with Prometheoarchaeum syntrophicum

Key Differences

• Polar bear is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Polar bear
Kingdom	Animalia (Animals)	Archaea (Archaea)
Phylum	Chordata (Chordates)	Asgardarchaeota (Asgardarchaeota)
Class	Mammalia (Mammals)	Lokiarchaeia
Order	Carnivora (Carnivorans)	CR-4
Family	Ursidae (Bears)	MK-D1
Genus	Ursus (Bears)	Prometheoarchaeum
Species	Ursus maritimus	Prometheoarchaeum syntrophicum

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

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.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.

Prometheoarchaeum syntrophicum is a member of the Asgard archaea, proposed as a key lineage linking the domains Archaea and Eukarya. Its long, entangling protrusions and syntrophic lifestyle with bacterial partners have informed hypotheses about the origin of eukaryotic cells.