Via Smithsonian.com:
Many unknown dinosaurs await discovery in rock formations all over the world, but some new species are hiding in plain sight. One such animal, described in an in-press Cretaceous Research paper, had one of the largest heads of any dinosaur....the Sam Noble specimen may not be a Pentaceratops at all. Longrich lists 22 features that distinguish the large specimen from the smaller Pentaceratops and more closely associate it with the subgroup of horned dinosaurs containing Triceratops, Torosaurus and their closest relatives (called the Triceratopsini). On this basis Longrich has called the unique specimen Titanoceratops...
Image from cosmicautumn