vs Polar bear

Collaria arcyrionema compared with Ursus maritimus

Key Differences

• is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Protozoa (protozoa)	Animalia (Animals)
Phylum	Mycetozoa	Chordata (Chordates)
Class	Myxomycetes (Myxomycetes)	Mammalia (Mammals)
Order	Stemonitidales	Carnivora (Carnivorans)
Family	Stemonitidaceae	Ursidae (Bears)
Genus	Collaria	Ursus (Bears)
Species	Collaria arcyrionema	Ursus maritimus

Conservation Status

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, and Sweden.

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.

<em>Collaria arcyrionema</em> is a myxomycete — a plasmodial slime mould — belonging to the class Myxomycetes within the phylum Mycetozoa. Slime moulds of the genus Collaria are not true fungi but are instead classified within the group Amoebozoa, reflecting their distinctive biology that combines amoeba-like feeding behaviour with a complex, multi-stage life cycle. <em>Collaria arcyrionema</em> produces small, stalked sporangia — spore-bearing structures — that are characteristic of the genus, typically forming on decaying organic matter such as dead wood, leaf litter, and damp substrate in forested environments. The species has a reported distribution in Brazil, Norway, and Sweden, with occurrence noted across parts of Europe and South America. Like other myxomycetes, <em>Collaria arcyrionema</em> plays a role in nutrient cycling by consuming bacteria and organic detritus during its plasmodial phase. Detailed biological traits including typical lifespan measures and physical dimensions are poorly documented for this species in available literature.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway