Architectural Review Committee
Parasaurolophus has been found in Utah, New Mexico, and Alberta, Canada.The remarkable crest of this duck-billed dinosaur was a hollow tube 5 feet (1.5 meters) long that extended back over the animal's shoulders. The purpose of this crest may have been to improve the dinosaur's sense of smell, or it may have served as a resonance chamber to allow for trumpetlike sounds.
Pentaceratops was discovered in New Mexico. A long-frilled ceratopsian related to Chasmosaurus, Pentaceratops had two long brow horns, a shorter nose-horn, and two additional horn-like growths, one on each cheek. It had more horns than any other horned dinosaur. Its head (including the frill) was 7.5 feet ( 2.3 meters) long, more than one-third as long as its body.
Found in Mongolia, Prenocephale was related to Stegoceras.Nodes, or small bony knobs, decorated the back of its skull. Its front teeth were long and sharp./h6>
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