Common Pinmould vs Polar bear

Mucor mucedo compared with Ursus maritimus

Key Differences

Common Pinmould is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Common Pinmould	Polar bear
Kingdom	Fungi (真菌界)	Animalia (动物界)
Phylum	Mucoromycota (毛霉门)	Chordata (脊索动物门)
Class	Mucoromycetes (毛霉纲)	Mammalia (哺乳動物)
Order	Mucorales (毛黴目)	Carnivora (食肉目)
Family	Mucoraceae	Ursidae (Bears)
Genus	Mucor	Ursus (Bears)
Species	Mucor mucedo	Ursus maritimus

Conservation Status

Common Pinmould

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Common Pinmould

Habitat

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

Range

Distributed across Belgium, Brazil, Denmark, and Norway.

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.

Common Pinmould

<em>Mucor mucedo</em>, the common pin mould, is a zygomycete fungus in the family Mucoraceae, belonging to one of the earliest-diverging lineages of terrestrial fungi. It is characterised by long, unbranched sporangiophores topped with spherical, pin-like sporangia that release large numbers of asexual spores, giving infested substrates a grey or white mouldy appearance. The species is a saprotrophic decomposer, typically colonising dung, soil, decaying organic matter, and stored food products, where it plays a role in nutrient cycling and organic matter breakdown. <em>Mucor mucedo</em> is distributed across Europe, with records from Belgium, Denmark, and Norway, and in South America including Brazil, and is likely cosmopolitan given the ease with which its spores disperse through the air. It is assessed as Not Evaluated on the IUCN Red List, as fungal conservation assessments remain incomplete globally. Sexual reproduction involves the fusion of compatible mating types to produce resistant zygospores. Biological traits such as colony growth rates under standardised conditions, typical biomass production, and detailed ecological roles beyond general decomposition remain poorly documented in the scientific literature. The species is non-pathogenic to healthy humans but may cause opportunistic infections in immunocompromised individuals.