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A rendering of a new dinosaur species, dubbed Iguanacolossus, found near Green River. Rendering courtesy Utah Department of Natura An almost complete, though crushed, skull of Hippodraco, a new species of early Cretaceous dinosaur unearthed Arches National Park A rendering of a new dinosaur species, dubbed Hippodraco, found near Arches National Park. Rendering Courtesy Utah Department of N Don DeBlieux of the Utah Geological Survey, back, and volunteer Ron Long excavate a skeleton of Iguanacolossus, a recently named