Brook Floater vs Coimbra-Filho’s Titi

Alasmidonta varicosa compared with Callicebus coimbrai

Key Differences

• Brook Floater is Vulnerable while Coimbra-Filho’s Titi is Endangered.

Taxonomic Classification

Rank	Brook Floater	Coimbra-Filho’s Titi
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Mollusca (มอลลัสกา)	Chordata (สัตว์มีแกนสันหลัง)
Class	Bivalvia (ชั้นไบวาลเวีย)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Unionida (Unionida)	Primates (อันดับวานร)
Family	Unionidae	Pitheciidae
Genus	Alasmidonta	Callicebus
Species	Alasmidonta varicosa	Callicebus coimbrai

Evolutionary Relationship

Brook Floater and Coimbra-Filho’s Titi share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Brook Floater

VU — Vulnerable

Coimbra-Filho’s Titi

EN — Endangered

Physical Characteristics

Attribute	Brook Floater	Coimbra-Filho’s Titi
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Coimbra-Filho’s Titi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.

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.