Coimbra-Filho’s Titi vs Western Dwarf Squirrel

Callicebus coimbrai compared with Microsciurus mimulus

Key Differences

• Coimbra-Filho’s Titi is Endangered while Western Dwarf Squirrel is Least Concern.

Taxonomic Classification

Rank	Coimbra-Filho’s Titi	Western Dwarf Squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Mammalia (Mammals)	Mammalia (Mammals)
Order	Primates (Primates)	Rodentia (Rodents)
Family	Pitheciidae	Sciuridae (Squirrels)
Genus	Callicebus	Microsciurus
Species	Callicebus coimbrai	Microsciurus mimulus

Evolutionary Relationship

Coimbra-Filho’s Titi and Western Dwarf Squirrel share a common ancestor at the Class level: Mammalia. (Mammals)

Conservation Status

Coimbra-Filho’s Titi

EN — Endangered

Western Dwarf Squirrel

LC — Least Concern

Physical Characteristics

Attribute	Coimbra-Filho’s Titi	Western Dwarf Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coimbra-Filho’s Titi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Western Dwarf Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

Coimbra-Filho’s Titi

The Coimbra-Filho's Titi (Callicebus coimbrai), also known as Coimbra-Filho's Titi Monkey, is a small New World monkey in the family Pitheciidae, named in honour of the Brazilian primatologist Adelmar F. Coimbra-Filho. This titi monkey is endemic to the Atlantic Forest of northeastern Brazil, with its range restricted to the states of Sergipe and southern Alagoas—one of the most critically fragmented and threatened biomes on Earth. Adults are small, with reddish-brown fur on the flanks and upperparts, pale grey on the underparts, and an orange-red forehead band. Like all titi monkeys, Callicebus coimbrai is highly social, living in monogamous family groups of 2–5 individuals that engage in elaborate dawn duets and tail-twining behaviour as expressions of pair bonding. The species inhabits Atlantic Forest fragments, including lowland and highland forest patches, riverine gallery forest, and secondary growth, where it subsists on fruits, seeds, leaves, and occasional invertebrates. The Coimbra-Filho's Titi is classified as Endangered by the IUCN due to its severely fragmented range within one of the world's most deforested biomes, with less than 12% of original Atlantic Forest remaining, ongoing habitat loss from agricultural expansion, and small, isolated population sizes highly vulnerable to stochastic extinction events.