Cuatro Ojos vs Pex tachuela

Aotus nigriceps compared with Echinorhinus brucus

Key Differences

• Cuatro Ojos is Least Concern while Pex tachuela is Endangered.

Taxonomic Classification

Rank	Cuatro Ojos	Pex tachuela
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Mammalia (mamíferos)	Elasmobranchii
Order	Primates (Primates)	Squaliformes (Squaliformes)
Family	Aotidae	Echinorhinidae
Genus	Aotus	Echinorhinus
Species	Aotus nigriceps	Echinorhinus brucus

Evolutionary Relationship

Cuatro Ojos and Pex tachuela share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Cuatro Ojos

LC — Least Concern

Pex tachuela

EN — Endangered

Physical Characteristics

Attribute	Cuatro Ojos	Pex tachuela
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cuatro Ojos

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Pex tachuela

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Portugal. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Cuatro Ojos

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.

Pex tachuela

The Bramble shark (Echinorhinus brucus) is a species in the genus Echinorhinus. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.