Pithecia milleri is categorized as Data De cient by the IUCN, it is present in Colombia and Ecuador, western Amazonian basin, but few is known on its distribution limits in Colombia. Field observations were recorded ad libitum between 2007 and 2015. We carried out a eld expedition in the mid Caquetá River and its tributaries in the departments of Caquetá and Putumayo. We made a review of records on data bases of Global Biodiversity Information Facility, Arctos, VertNet and the digital catalogues of mammals of the Instituto de Ciencias Naturales of Universidad Nacional de Colombia, the Field Museum of Natural History of Chicago, the American Museum of Natural History and the Zoology Museum of Michigan University. In addition, we reviewed specimens of the genera in di erent collections in the country. We obtained 77 records for the species. I
