Mico melanurus
Close to qualifying as threatened
Source: IUCN Red List
The black-tailed marmoset (Mico melanurus) is a species of New World monkey from central South America, where ranging from the south-central Amazon in Brazil, south through the Pantanal and eastern Bolivia, to the Chaco in far northern Paraguay. It is the southernmost member of the genus Mico and the only where most of its range is outside the Amazon.