koala vs

Phascolarctos cinereus compared with Nitrosopelagicus brevis

Key Differences

• koala is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	koala
Kingdom	Animalia (động vật)	Archaea (Archaea)
Phylum	Chordata (động vật có dây sống)	Thermoproteota (Thermoproteota)
Class	Mammalia (lớp Thú)	Nitrososphaeria (Nitrososphaeria)
Order	Diprotodontia (Thú hai răng trước)	Nitrososphaerales (Nitrososphaerales)
Family	Phascolarctidae (Koalas)	Nitrosopumilaceae
Genus	Phascolarctos (Koalas)	Nitrosopelagicus
Species	Phascolarctos cinereus	Nitrosopelagicus brevis

Conservation Status

koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

NE — Not Evaluated

Physical Characteristics

Attribute	koala
Diet	Herbivore	—
Average Lifespan	15 years	—
Average Length	75 cm	—
Average Weight	10.0 kg	—

Habitat & Geographic Range

koala

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

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

koala

Iconic marsupial of eastern and southeastern Australia, koalas weigh up to 15 kg and spend up to 22 hours daily sleeping to conserve energy from their low-calorie eucalyptus leaf diet. Highly specialized to process toxic eucalyptus compounds that would kill most other mammals, they have gut microbiomes uniquely adapted for detoxification. Listed as Endangered in 2022, with populations decimated by chlamydia disease, habitat clearing, and climate change.

Nitrosopelagicus brevis is a small, aerobic ammonia-oxidizing thaumarchaeon belonging to the abundant marine archaeal group Nitrososphaeria. It inhabits the open ocean, particularly the nutrient-poor photic zone of tropical and subtropical oceanic gyres. This chemolithoautotrophic organism oxidizes ammonia to nitrite and plays a fundamental role in marine nitrogen cycling.