New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism Sampson, Scott D. ; Loewen, Mark A. ; Farke, Andrew A. ; Roberts, Eric M. ; Forster, Catherine A. ; Smith, Joshua A. ; Titus, Alan L. Abstract Publication: PLoS ONE Pub Date: September 2010 DOI: 10.1371/journal.pone.0012292 Bibcode: 2010PLoSO...512292S