Discovering a new ceratopsian dinosaur is a rare feat these days, but researchers at the Canadian Museum of Nature did just that (story). Formerly the third species of Chasmosaurus described to date, this species has been placed in its own genus by Sampson et al. (2010).

References:
Sampson, S.D., Loewen, M.A., Farke, A.A., Roberts, E.M., Forster, C.A., Smith, J.A. and Titus, A.L. 2010. New horned dinosaurs from Utah provide evidence for intracontinental dinosaur endemism. PLoS ONE 5(9): e12292. doi:10.1371/journal.pone.0012292
Holmes, R.B., Forster, C., Ryan, M. and Shepherd, K.M. 2001. A new species of Chasmosaurus (Dinosauria: Ceratopsia) from the Dinosaur Park Formation of southern Alberta. Can. J. Earth Sci. 38(10): 1423-1438.