Branisella is an extinct genus of New World monkey from the Salla formation of what is now Bolivia during the late Oligocene, approximately 26 million years ago. It is the oldest fossil New World Monkey discovered. Within platyrrhines, this taxon has been interpreted as either a stem platyrrhine not related to any of the living forms, or as a primitive callitrichine. As Branisella is currently the only South American primate taxon known until the Miocene, more fossils are needed before its phylogenetic position can be clearly established.