| Rylands' bald-faced saki | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Primates |
| Suborder: | Haplorhini |
| Infraorder: | Simiiformes |
| Family: | Pitheciidae |
| Genus: | Pithecia |
| Species: | P. rylandsi |
| Binomial name | |
| Pithecia rylandsi Marsh, 2014 | |
Rylands' bald-faced saki (Pithecia rylandsi) is a disputed species of saki monkey, a type of New World monkey. It is found in Bolivia, Peru, and Brazil.
Populations in this species were formerly classified within the Rio Tapajós saki (P. irrorata), but a 2014 study described these populations as a distinct species, P. rylandsi, based on their distinctive pelage. [2] [3] However, a 2019 study, also analyzing pelage color variation across the range of the P. irrorata species complex, delineated only two distinctive groups corresponding to P. irrorata and Vanzolini's bald-faced saki (P. vanzolini), with the distinctive pelage used to distinguish P. rylandsi falling within the range of variation of P. irrorata. In addition, the study found that due to an unclear type locality, the holotype of P. irrorata may have been collected within the range of P. rylandsi, which would render rylandsi instantly synonymous with P. irrorata. [4] Based on this study, the American Society of Mammalogists (tentatively, pending further phylogenetic studies) synonymized rylandsi with irrorata, [5] but the IUCN Red List and ITIS retain rylandsi as a distinct species. [1] [6]
This species is named after Brazilian primatologist Anthony Rylands, a senior research scientist at Conservation International, deputy chair of the IUCN/SSC Primate Specialist Group, member of the Brazilian Academy of Sciences, a former Vertebrate Zoology professor at the Federal University of Minas Gerais, and founding editor for the journal Neotropical Primates. [2]
This species is found in northwestern Bolivia, southeastern Peru, and southern Rondônia & western Mato Grosso in Brazil. It is found north of the Madre de Dios River in Bolivia and Peru, and east & north of the Guaporé River in Brazil. It may range as far north as the Ji-Paraná River or west to the Jamari River. [1]
It is one of the largest of the sakis. This species is easily distinguishable from all other sakis by its very large size, very black, bare face, and the extreme white grizzling, which can often cause older males to look almost entirely white. Younger males are black in color with moderate grizzling. Adult females are almost as intensely white as males, and their hair on the forehead can form white "bangs". [2] [7]
This species is thought to be threatened by deforestation for cattle ranching, as well as poaching, and thus its population is thought to be declining. They are sometimes also found in the pet trade. It is thus classified as Vulnerable by the IUCN Red List. [1]
The Pitheciidae are one of the five families of New World monkeys now recognised. Formerly, they were included in the family Atelidae. The family includes the titis, saki monkeys and uakaris. Most species are native to the Amazon region of Brazil, with some being found from Colombia in the north to Bolivia in the south.
Sakis, or saki monkeys, are any of several New World monkeys of the genus Pithecia. They are closely related to the bearded sakis of genus Chiropotes.
Pitheciinae is a subfamily of the New World monkey family Pitheciidae. It contains three genera and 14 species. Pitheciines are forest dwellers from northern and central South America, east of the Andes.
The white-faced saki, called the Guianan saki and the golden-faced saki, is a species of the New World saki monkey. They can be found in Brazil, French Guiana, Guyana, Suriname and Venezuela. This species lives in the understory and lower canopy of the forest, feeding mostly on fruits, nuts, seeds, and insects. Although they are arboreal creatures and are specialists of swinging from tree to tree (brachiation), they are also terrestrial when foraging. White-faced sakis typically live around 14 years in their natural habitat and have been recorded to live up to 36 years in captivity. Sakis are active in the day and sleep highly elevated (15-20m) in trees with many leaves to shelter them from weather and flying predators.
The collared titi monkey is a species of titi, a type of New World monkey. It is endemic to northern Brazil.
The white-eared titi monkey also known as the Bolivian titi or Bolivian gray titi, is a species of titi monkey, a type of New World monkey, from eastern Bolivia and an area of western Brazil. The species has a range that extends east from the Manique River in Beni Department, Bolivia to southern Rondônia in Brazil. The southern end of its range includes forests around the city of Santa Cruz de la Sierra.
The monk saki also known as Geoffroy's monk saki, is a species of saki monkey, a type of New World monkey, from South America. It is found in forested areas of northwestern Brazil and northeastern Peru.
The Rio Tapajós saki or Gray's bald-faced saki is a species of saki monkey, a type of New World monkey, from South America. It is found in parts of western Brazil, southeastern Colombia, southeastern Peru and possibly northern Bolivia.
The equatorial saki, also called the red-bearded saki, is a species of saki monkey, a type of New World monkey. It is found in northeastern Peru and Ecuador.
Miller's saki, also known as Miller's monk saki, is a species of saki monkey, a type of New World monkey. Its range includes parts of southwestern Colombia, northeastern Ecuador, and perhaps adjacent areas in Peru. This species was originally described as a species by J. A. Allen, demoted to a subspecies of the monk saki in 1987, and raised back to full species status in 2014. Confusion over the taxonomy of saki monkeys has arisen in part due to poorly labeled or mislabeled museum specimens. Males and females of this species, like those of other sakis, have differently colored pelage, with the females being more grayish in the face and overall, and the males a darker, grizzled black but with brown in the face and forearms.
The Napo saki, also known as the Napo monk saki, is a species of saki monkey, a type of New World monkey. Its range includes parts of eastern Ecuador and northern Peru. The name is derived from the Napo River in its locality. This species was originally described by Lönnberg as the subspecies Pithecia monachus napensis and has been treated as a synonym of P. monachus monachus. Hershkovitz retained it under P. monachus in 1987, but it was raised to full species status in 2014.
Vanzolini's bald-faced saki is a species of saki monkey, a type of New World monkey. Its range is in western Brazil. The monkey is named after Brazilian zoologist Paulo Vanzolini. This species was originally described by Hershkovitz as the subspecies Pithecia irrorata vanzolinii based on individuals collected in 1936 by Alfonso M. Olalla, but it was raised to full species status in 2014. For many years, there had been no record of the species in nature. Further specimens were collected in 1956 by Fernando Novaes and his assistant Miguel Moreira. The mammals in this expedition were collected alive and prepared as museum specimens, as described by Cory T. Carvalho, the mammalogist working at the Goeldi museum at the time.
Cazuza's saki is a species of saki monkey, a type of New World monkey. It is endemic to northwestern Brazil.
The hairy saki is a species of saki monkey, a type of New World monkey. It is found in northern Peru, southern Colombia, and a small portion of northwestern Brazil.
The burnished saki is a species of saki monkey, a type of New World monkey. It is found in central Peru and a small portion of adjacent Brazil.
Isabel's saki is a species of saki monkey, a type of New World monkey. It is endemic to a small portion of northern Peru.
Mittermeier's Tapajós saki is a disputed species of saki monkey, a type of New World monkey. It is endemic to west-central Brazil.
Pissinatti's saki or Pissinatti's bald-faced saki is a disputed species of saki monkey, a type of New World monkey. It is endemic to Brazil.
Toppin's titi monkey is a species of titi monkey, a type of New World monkey, from Brazil, Peru, and Bolivia.
