Aquatic oligochaete worm vs Koala

Potamothrix bavaricus compared with Phascolarctos cinereus

Key Differences

Aquatic oligochaete worm is Not Evaluated while Koala is Vulnerable.

Taxonomic Classification

Rank	Aquatic oligochaete worm	Koala
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Annelida (Ringelwürmer)	Chordata (Chordatiere)
Class	Clitellata (Gürtelwürmer)	Mammalia (Säugetiere)
Order	Tubificida (Tubificida)	Diprotodontia (Marsupials)
Family	Naididae	Phascolarctidae (Koalas)
Genus	Potamothrix	Phascolarctos (Koalas)
Species	Potamothrix bavaricus	Phascolarctos cinereus

Evolutionary Relationship

Aquatic oligochaete worm and Koala share a common ancestor at the Kingdom level: Animalia. (Tier)

Ansehen Kingdom: Animalia

Conservation Status

Aquatic oligochaete worm

NE — Not Evaluated

Koala

VU — Vulnerable

Population: ~100.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Aquatic oligochaete worm	Koala
Diet	—	Herbivore
Average Lifespan	—	15 years
Average Length	—	75 cm
Average Weight	—	10.0 kg

Habitat & Geographic Range

Aquatic oligochaete worm

Habitat

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

Range

Found across Europe (7 countries) and North America (United States).

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.

Aquatic oligochaete worm

The Aquatic oligochaete worm (Potamothrix bavaricus) is a species in the genus Potamothrix. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

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.