What is Saurolophus?
{{taxobox | name = ''Saurolophus'' | image = Saurolophus osborni.png | status = fossil | fossil_range = [[Upper Cretaceous]] | regnum = [[Animalia]] | phylum = [[Chordata]] | classis = [[Sauropsida]] | superordo = [[Dinosauria]] | ordo = [[Ornithischia]] | infraordo = [[Ornithopoda]] | familia = [[Hadrosauridae]] | subfamilia = [[Hadrosaurinae]] | genus = '''''Saurolophus''''' | genus_authority = [[Barnum Brown|Brown]], 1912 }} {{italictitle}} '''''Saurolophus''''' was a [[duck]]-billed [[dinosaur]]. It lived during the [[Upper Cretaceous]] period, 69.5-68.5&nbsp;million years ago,<ref name=ABS09>{{cite journal |year=2009 |title=A redescription of the ankylosaurid dinosaur ''Dyoplosaurus acutosquameus'' Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus |journal=Journal of Vertebrate Paleontology |volume=29 |issue=4 |pages=1117–1135 |doi=10.1671/039.029.0405|s2cid=85665879 |last1=Arbour |first1=Victoria M. |last2=Burns |first2=Michael E. |last3=Sissons |first3=Robin L. }}</ref> toward the end of the [[Mesozoic|Mesozoic Era]]. ''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]]. == References == {{Reflist}} {{biology-stub}} [[category:Hadrosauridae]]