Uakari is the common name for the New World monkeys of the genus Cacajao. Both the English and scientific names are believed to have originated from indigenous languages.
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 stiff-spine spiny-rat or Tefe spiny rat, is a spiny rat species found in Brazil and Colombia.
The Kulina spiny-rat or Javari spiny rat, is a spiny rat species found in Brazil and Peru.
The long-tailed spiny rat is a spiny rat species found in Bolivia, Brazil and Paraguay.
Patton's spiny-rat is a spiny rat species found in Brazil and Peru.
Simons's spiny rat is a spiny rat species found in Bolivia, Brazil, Colombia, Ecuador and Peru. It was named for American scientific collector Perry O. Simons.
Marmosops is a genus of Neotropical opossums of the family Didelphidae. The genus was originally treated as a subgenus from the genus Marmosa rather than having their own classification. This was changed in 1989 by Gardner and Crieghton, who officially separated the group and made them their own genus. The mix-up between to genera Marmosa and Marmosops was common due to the similar appearances including size and other external features. However, the two groups differ significantly in their integument and in the arrangement of their skull and dentition. The dentition is similar in morphology between the two groups, with the exception of the deciduous lower third premolar varying from one genus to the next. The similarity between the two continues to cause the genus Marmosops to be frequently misidentified due to the lack of knowledge regarding the species along with the overlooked traits that help separate them from other opossums. The Marmosops are also commonly confused with the genus Gracilinanus, but this is quickly ruled out by a large number of differing characteristics. These differences include the arrangement of their digits, caudal scales, and the central hair on the scales changing from a three hairs per follicle to many more. This causes the hair of the Gracilinanus to be thicker and has also found to be heavily pigmented. The last group commonly confused with Marmosops is known as the genus Thylamys. These animals have a contrasting dorsal body pelage and the taxa are actually quite different.
The genus Neacomys, also known as bristly mice because of their spiny fur, includes several species of rodents in the tribe Oryzomyini of family Cricetidae. It is most closely related to Oligoryzomys, Oreoryzomys, and Microryzomys. Neacomys species are mainly found in the Amazon basin, but N. pictus occurs in Panama and N. tenuipes in montane Colombia.
Tarsomys is a genus of rodent in the family Muridae found exclusively in Mindanao, Philippines.
The Magdalena spiny rat is a species of rodent in the family Echimyidae. It is endemic to Colombia.
The Minca spiny rat is a species of rodent in the family Echimyidae. It is endemic to Colombia.
The gray-footed spiny rat is a species of rodent in the family Echimyidae. It is found in Colombia and Venezuela.
The Aracá uakari, also known as the Ayres black uakari, is a newly described species of monkey from the northwest Brazilian Amazon. It was found by Jean-Phillipe Boubli of the University of Auckland after following native Yanomamo Indians on their hunts along the Rio Aracá, a northern tributary of the Rio Negro. It was subsequently described in 2008 together with the more westerly distributed Neblina uakari. Until then, the black-headed uakari was the only species of mainly black uakari that was recognized. Stephen F. Ferrari et al proposed treating the Aracá uakari as a subspecies of the black-headed uakari rather than as a separate species.
The Neblina uakari or black-headed uakari, is a newly described species of monkey from the far northwest Brazilian Amazon and adjacent southern Venezuela. It was found by Jean-Phillipe Boubli of the University of Auckland and described together with the more easterly distributed Aracá uakari in 2008. Until then, the black-headed uakari was the only species of mainly black uakari that was recognized.
Vieira's titi monkey is a species of titi, a type of New World monkey, from central-northern Brazil.
Neacomys aletheia, the Upper Juruá bristly mouse, is a species of rodent in the genus Neacomys.
Neacomys jau, also known as the Jaú bristly mouse, is a species of rodent in the genus Neacomys.
Neacomys marci, also known as Marc's bristly mouse is a species of rodent in the genus Neacomys of family Cricetidae that is found only in Ecuador.
