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Hanssuesia
''Hanssuesia'' is a genus of pachycephalosaurid dinosaurs from the late Cretaceous period. It lived in what is now Alberta and Montana, which contains the single species ''Hanssuesia sternbergi''. ''Hanssuesia'' based on material originally named ''Troodon sternbergi'' by Barnum Brown and Erich Maren Schlaikjer in 1943. Later, it was transferred to ''Stegoceras'' as ''S. sternbergi'' by Williamson and Carr, 2002 and by Ryan and Evans, 2005. The genus was first named by Robert M. Sullivan in 2003 and the type species is ''Hanssuesia sternbergi''. ''H. sternbergi'' is known from 7 specimens (mainly from frontoparietals) which were collected from two formations of the Belly River Group of Alberta, Canada, the Dinosaur Park Formation (late Campanian, 76.5–75 ma) in the Dinosaur Provincial Park, and the Oldman Formation (middle Campanian, 77.5-76.5 ma), as well as from the upper Judith River Formation of Montana, USA (late Campanian, 76–75 ma). Like other pachycephalosaurs, ''Hanssuesia'' had a thick skull roof. However, ''Hanssuesia'' is distinguished from other pachycephalosaurs by having a depressed parietal region, wide frontoparietal dome, broad nasal characteristics, reduced prefontal lobes, and a reduced parietosquamosal shelf.〔 ==See also==
* Timeline of pachycephalosaur research
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Hanssuesia」の詳細全文を読む
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