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Tylocephale
''Tylocephale'' (meaning "swollen head", from the Greek ''τυλη'' meaning 'callus' or 'hard swelling' and ''κεφαλη'' meaning 'head') is a genus of pachycephalosaurid dinosaur from the Late Cretaceous period. It was a herbivorous dinosaur estimated to have been about 1.4 metres (4.6 ft) in length. It had the tallest dome of any known pachycephalosaur. ''Tylocephale'' lived during the Campanian stage, around 75 million years ago. It was discovered in the Khulsan region of Mongolia. The type species is ''T. gilmorei'', described by Maryańska and Osmólska in 1974.〔Sullivan, R.M (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria: Ornithischia)." in: Lucas, S. G. and Sullivan, R.M., eds., (2006), Late Cretaceous vertebrates from the Western Interior. ''New Mexico Museum of Natural History and Science Bulletin'' 35.〕 The pachycephalosaurids evolved in Asia and then migrated into North America, thus it is likely that ''Tylocephale'' migrated back into Asia. It is closely related to ''Prenocephale'' ==See also==
* Timeline of pachycephalosaur research
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