Kosmoceratops is a ceratopsian dinosaur from the Late Cretaceous period of the United States. It was first named by Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine A. Forster, Joshua A. Smith, and Alan L. Titus in 2010. It is famed for the crest of fifteen horns on the top of its head, giving it some of the most horns of any ceratopsian. The frill of Kosmoceratops is the shortest relative to its width of any ceratopsian; it is about twice as wide as it is long. Kosmoceratops is known to have shared it’s habitat with another chasmosaurine ceratopsian named Utahceratops, while a slightly more distantly related centrosaurine ceratopsian called Nasutoceratops is also present. Hadrosaurs such as Parasaurolophus and Gryposaurus are also present, while the main predatory threats to Kosmoceratops would include tyrannosaurs such as Teratophoneus and when younger troodonts such as Talos.
Wikipedia has a more detailed and comprehensive article on Kosmoceratops