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Gigantoraptor is the largest known oviraptorosaur for which skeletal material is available. Approximately three times as long and 35 times heavier than the largest earlier-discovered oviraptorosaur Citipati , the holotype of Gigantoraptor has been estimated at 8 m (26 ft) long with a height of 3.5 m (11 ft) at the hips, and a ponderous weight ...
If Gigantoraptor erlianensis is a caenagnathid, then it would represent far and away the largest member of the group, measuring up to 8 meters (26 ft) in length and weighing up to 2 metric tons (2.2 short tons). [23]
They are distinct for their characteristically short, beaked, parrot-like skulls, with or without bony crests atop the head. They ranged in size from Caudipteryx, which was the size of a turkey, to the 8-meter-long, 1.4-ton Gigantoraptor. [2] The group (along with all maniraptoran dinosaurs) is close to the ancestry of birds.
The most characteristic feature of this group is the skull structure. ... Gigantoraptor erlianensis, Jiangxisaurus ganzhouensis and Shixinggia oblita. All four have ...
Skull (a, b, c) and pelvic girdle (d) details of embryonic Beibeilong. The skull of Beibeilong, like most caenagnathids, was edentulous (toothless) as it lacked alveoli (tooth sockets). The premaxilla (front bone of the upper jaw) had a rugose texture, likely developing a rhamphotheca.
Skeletal mount of Gigantoraptor. 2004. Lü and others described the new genus and species Nemegtia barsboldi. [12] 2005. Zanno and Sampson described the new genus and species Hagryphus giganteus. [13] Lü and others described the new genus Nemegtomaia. [14] Lü and Zhang described the new genus and species Shixinggia oblita. [15] 2007
Its skull was long, low, and slender. Similar to tyrannosaurs, it had small, conical teeth at the front of its jaws, and longer, more curved teeth near the back. The hand claws of Megaraptor were very long and strongly curved, with the claw of the first finger measuring 35 cm (14 in). The claw of the third finger was the smallest, only 6.5 cm ...
Its skull has an estimated length of 90.5 centimetres (35.6 in). The skulls of the paratypes are 80 centimetres (31 in) and 63 centimetres (25 in) long and their weights have been estimated at 596 kilograms (1,314 lb) and 493 kilograms (1,087 lb), respectively.