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Megaraptor
''Megaraptor'' ("giant thief") is a genus of large tyrannosauroid dinosaur that lived in the Turonian to Coniacian ages of the Late Cretaceous.〔〔 Its fossils have been discovered in the Patagonian region of Argentina. Initially thought to have been a giant dromaeosaur-like coelurosaur, it was classified as a neovenatorid allosauroid in previous phylogenies, but the most recent phylogeny has placed it as a basal tyrannosauroid coelurosaur.
==Description==
''Megaraptor'' was initially described as a giant dromaeosaur, known primarily from a single claw (about 30 cm long) that resembled the sickle-shaped foot claw of dromaeosaurids. The discovery of a complete front limb, however, showed that this giant claw actually came from the first finger of the hand. In 2010 Gregory S. Paul estimated its length at eight metres, its weight at one tonne.〔Paul, G.S., 2010, ''The Princeton Field Guide to Dinosaurs'', Princeton University Press p. 99〕 The hands were unusually elongated, bearing sickle-shaped claws even more recurved than those of spinosaurids.〔Calvo, J.O., Porfiri, J.D., González-Riga, B.J., and Kellner, A.W. (2007) "A new Cretaceous terrestrial ecosystem from Gondwana with the description of a new sauropod dinosaur". ''Anais Academia Brasileira Ciencia'', 79(3): 529-41.()〕
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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