Apparently it's not exactly a discovery. Some people knew about this creature back in the 70's and perhaps earlier but didn't realize it was an undocumented species. http://www.independent.co.uk/news/science/new-monkey-species-found-in-colombia-2053616.html
Sometimes I wish they would not find new species as it means we are probably invading their territory and they will not thrive as they once did.