The most complete dinosaur fossil ever uncovered in , called 'incredibly unusual' by state officials, still remains 85 percent buried since its 2007 discovery.
Paleontologists have confirmed that the specimen was once : a family of , duck-billed dinosaurs that existed over 82 million years ago.
But the hadrosaur is — including at least 61 identified, individual species with possibly hundreds of unique kinds having once roamed the Earth, according to experts.
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