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Gigantoraptor
''Gigantoraptor'' is a genus of giant oviraptorosaurian theropod dinosaur. It was discovered in 2005 in the Iren Dabasu Formation, Erlian basin, in Inner Mongolia. The age of the Iren Dabasu formation is controversial. Based on ostracods, Godefroit suggested the unit was Nemegt equivalent or about 70 million years old, although some dinosaur remains suggest an older Baynshirenian age c 85-90 Ma.
==Discovery and naming==
Since 2001, in a quarry at Saihangaobi, in Sonid Left Banner (Inner Mongolia), numerous remains of the sauropod ''Sonidosaurus'' have been uncovered. In April 2005 Chinese paleontologist Xu Xing was asked to reenact the discovery of ''Sonidosaurus'' for a Japanese documentary. Xu obliged them by digging out a thighbone. As he wiped the bone clean, he suddenly realized it was not from a sauropod, but from an unidentified theropod in the size class of ''Albertosaurus''. He then stopped the filming to secure the serendipitous find. This way, the discovery of the ''Gigantoraptor'' holotype fossil was documented on film.
In 2007, the type species ''Gigantoraptor erlianensis'' was named and described by Xu, Tan Qingwei, Wang Jianmin, Zhao Xijin and Tan Lin. The generic name is derived from Latin ''gigas'', ''gigantis'', "giant" and ''raptor'', "seizer". The specific name refers to the Erlian Basin.〔
The only known type specimen, LH V0011, was found in layers dating to the Campanian-Maastrichtian, about seventy million years old. It consists of is the incomplete and disassociated remains of a single subadult individual, a partial skeleton lacking the cranium but including the lower jaw, a single neck vertebra, most of the back and tail and the majority of the frontlimb and hindlimb elements.〔
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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