Gray-bellied Night Monkey vs River Lamprey

Aotus lemurinus compared with Lampetra ayresii

Key Differences

• Gray-bellied Night Monkey is Vulnerable while River Lamprey is Least Concern.

Taxonomic Classification

Rank	Gray-bellied Night Monkey	River Lamprey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Petromyzonti (Petromyzonti)
Order	Primates (Primates)	Petromyzontiformes (lamprey)
Family	Aotidae	Petromyzontidae
Genus	Aotus	Lampetra
Species	Aotus lemurinus	Lampetra ayresii

Evolutionary Relationship

Gray-bellied Night Monkey and River Lamprey share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Gray-bellied Night Monkey

VU — Vulnerable

River Lamprey

LC — Least Concern

Physical Characteristics

Attribute	Gray-bellied Night Monkey	River Lamprey
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Gray-bellied Night Monkey

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

River Lamprey