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| authority = Novas, 1992 | parent_authority = Bonaparte & Novas, 1985 | display_parents = 2 | subdivision_ranks = Families | subdivision = Abelisauridae Noasauridae }} Abelisaurs (Abelisauria or Abelisauroidea) were a phylogenetic situation within neotheropoda. Some well-known dinosaurs of this group include the abelisaurids ''Abelisaurus'', ''Carnotaurus'', and ''Majungasaurus''. Abelisaurs flourished in the Southern hemisphere during the Cretaceous period, but their origins can be traced back to at least the Middle Jurassic, when they had a more global distribution (the earliest known abelisaur remains come from Australian and South American deposits dated to about 170 million years ago). By the Cretaceous period, abelisaurs had apparently become extinct in Asia and North America, possibly due to competition from tyrannosaurs. However, advanced abelisaurs of the family Abelisauridae persisted in the southern continents until the Cretaceous–Paleogene extinction event million years ago.〔Martín D. Ezcurra, M.D. and Agnolín, F.L. (2012). "An abelisauroid dinosaur from the Middle Jurassic of Laurasia and its implications on theropod palaeobiogeography and evolution." ''Proceedings of the Geologists' Association'', (advance online publication).〕 ==Classification== * Superfamily Abelisauroidea * * ''Berberosaurus'' * * ''Betasuchus'' * * ''Eoabelisaurus'' * * ''Ozraptor'' * * Node Abelisauria * * * Family Noasauridae * * * Family Abelisauridae 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「Abelisaur」の詳細全文を読む スポンサード リンク
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