"Saurolophus" had a 5 inch (13 cm) long bony spike extending up from its forehead. There is speculation that this spike was attached to a flap of skin that covered the nostrils and could be blown up for displays and noise-making. Many "Saurolophus" fossils have been found, including one with fossilized skin impressions, in Alberta, Canada and Mongolia, China.= = = Stegoceras = = =
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