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Teratophoneus
''Teratophoneus'' is a genus of carnivorous tyrannosaurid theropod dinosaur which lived during the late Cretaceous period (late Campanian age, about 77 to 76 million years ago) in what is now Utah, USA. It is known from an incomplete skull and postcranial skeleton recovered from the Kaiparowits Formation. ''Teratophoneus'' was named by Thomas D. Carr, Thomas E. Williamson, Brooks B. Britt and Ken Stadtman in 2011 and the type species is ''T. curriei''. The generic name is derived from Greek ''teras'', "monster", and ''phoneus'', "murderer". The specific name honors Philip J. Currie.
==Description==
The holotype of ''Teratophoneus'' consists of a fragmentary skull and parts of the postcranial skeleton. The fossils were originally assigned to four different individuals, but are probably only of a single subadult animal. The specimen of ''Teratophoneus'' was not fully grown: according to an estimate by Carr et al. was about in length and 667 kg in weight.〔
Compared to the skull of an ''Albertosaurus'', ''Teratophoneus'' is roughly twenty-three percent shorter in proportion between the lacrimal bone of the orbital fenestra and the tip of the snout. The skull of ''Teratophoneus'' is also comparably deeper. It is unclear if there was a specific reason for these differences, but the extra depth may have allowed for stronger jaw muscles, increasing the bite force of ''Teratophoneus''.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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