Two more new dinosaurs have been discovered in Utah: Hippodraco and Iguanacolossus.
As described by Andrew McDonald, James Kirkland and their co-authors in PLoS One, the Cedar Mountain Formation contains a relatively rich collection of iguanodont dinosaurs. The dinosaurs Eolambia caroljonesa, Planicoxa venenica and Cedrorestes crichtoni have all been found in these rocks, and the two new dinosaurs from two separate sites add to this diversity. The larger of the two animals, Iguanacolossus, would have been about 30 feet long and is described as a “somewhat ponderous beast with robust limbs.” Hippodraco, at a comparatively paltry 15 feet, was a much smaller animal, and the remains described in the paper may have even belonged to a juvenile. Although both new dinosaurs are known from only partial skeletons, the bones are distinctive enough in anatomy and in their geologic context to justify placing them in new species. (Paleontologists also found the fragmentary remains of other dinosaurs at each of the two sites, but not enough was preserved to positively identify what genera or species they might belong to.)