Dolichocebus is an extinct New World monkey genus that lived in Argentine Patagonia (Sarmiento Formation) from about 21 to 17.5 million years ago during the Early Miocene (Colhuehuapian in the SALMA classification).
Dolichocebus was an extinct monkey species that lived in Argentina's Patagonia region, specifically in the Sarmiento Formation, between 21 and 17.5 million years ago during the Early Miocene period. This time frame corresponds to the Colhuehuapian stage within the SALMA classification system.