Aceramarca Gracile Opossum vs Coimbra-Filho’s Titi

Gracilinanus aceramarcae compared with Callicebus coimbrai

Key Differences

• Aceramarca Gracile Opossum is Least Concern while Coimbra-Filho’s Titi is Endangered.

Taxonomic Classification

Rank	Aceramarca Gracile Opossum	Coimbra-Filho’s Titi
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Didelphimorphia (Didelphimorphia)	Primates (サル目)
Family	Didelphidae	Pitheciidae
Genus	Gracilinanus	Callicebus
Species	Gracilinanus aceramarcae	Callicebus coimbrai

Evolutionary Relationship

Aceramarca Gracile Opossum and Coimbra-Filho’s Titi share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Aceramarca Gracile Opossum

LC — Least Concern

Coimbra-Filho’s Titi

EN — Endangered

Physical Characteristics

Attribute	Aceramarca Gracile Opossum	Coimbra-Filho’s Titi
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Aceramarca Gracile Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Coimbra-Filho’s Titi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Aceramarca Gracile Opossum

The Aceramarca Gracile Opossum (Gracilinanus aceramarcae) is a species in the genus Gracilinanus. It is currently classified as Least Concern on the IUCN Red List. It typically inhabits diverse terrestrial and aquatic ecosystems.

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.