Black-headed Night Monkey vs Coelacanth

Aotus nigriceps compared with Latimeria chalumnae

Key Differences

• Black-headed Night Monkey is Least Concern while Coelacanth is Critically Endangered.

Taxonomic Classification

Rank	Black-headed Night Monkey	Coelacanth
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum same	Chordata (Kordalılar)	Chordata (Kordalılar)
Class	Mammalia (memeliler)	Coelacanthi (Coelacanthi)
Order	Primates (Primat)	Coelacanthiformes (Coelacanthiformes)
Family	Aotidae	Latimeriidae
Genus	Aotus	Latimeria
Species	Aotus nigriceps	Latimeria chalumnae

Evolutionary Relationship

Black-headed Night Monkey and Coelacanth share a common ancestor at the Phylum level: Chordata. (Kordalılar)

Conservation Status

Black-headed Night Monkey

LC — Least Concern

Coelacanth

CR — Critically Endangered

Population: ~500

Trend: Decreasing ↓

Physical Characteristics

Attribute	Black-headed Night Monkey	Coelacanth
Diet	—	Carnivore
Average Lifespan	—	100 years
Average Length	—	1.8 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Black-headed Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Coelacanth

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 8 distinct biome types spanning the Australasia and Afrotropic and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Comoros, Indonesia, Mozambique, and South Africa. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-headed Night Monkey

The Black-headed Night Monkey (Aotus nigriceps) is a species in the genus Aotus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Coelacanth

A living fossil thought extinct for 65 million years until rediscovered off South Africa in 1938, coelacanths can reach 2 meters and 90 kg. They belong to an ancient lobe-finned lineage more closely related to tetrapods than to ray-finned fish, making them scientifically invaluable for understanding vertebrate evolution. Found in deep rocky reef habitats of the Indian Ocean, they are nocturnal and undergo internal fertilization, giving birth to fully formed live young. Critically Endangered.