New records and geographic distribution extension of two primate species in the Amazonia-Cerrado transition area, Brazil

We expanded the geographical distribution of Ateles marginatus and Chiropotes albinasus to the Amazonia-Cerrado ecotone region. Visual records were made while surveying through linear transections in a forest area associated with two important rivers that form the Xingu River in the central region of Mato Grosso State, Brazil. Females were observed with infants in the dry and rainy seasons. Other primate species locally recorded are Alouatta caraya, Mico emiliae, Plecturocebus vieirai, and Sapajus libidinosus. Our records demonstrate the importance of continuous forest areas in maintaining the primate community in landscapes modified by agribusiness activities.