Marca's marmoset (Mico marcai) is a species of marmoset that is endemic to the Amazon near the Aripuanã River in Brazil.
Roosmalens' dwarf marmoset (Callibella humilis or Callithrix (Calibella) humilis), also known as the black-crowned dwarf marmoset, is a small New World monkey native to the Amazon Rainforest, on the east bank of the lower Madeira River, and the west bank of the Aripuanã River, in Brazil.
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