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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 ...
This nest configuration suggest that whereas smallest oviraptorosaurs probably sat directly on the eggs, a large, Gigantoraptor-sized animal likely sat on the area devoid of eggs. Tanaka and colleagues pointed out that this adaption was beneficial to avoid egg-crushing and could have allowed some body-contact during incubation in these giant ...
With the exception of the 8-meter long Gigantoraptor, they are generally medium-sized and rarely exceeded 2 meters in length. The most primitive members have four pairs of teeth in the premaxillae , such as in Caudipteryx [ 7 ] and in Incisivosaurus they are enlarged and form bizarrely prominent bucktoothed incisors.
The largest members are represented by the enormous Beibeilong and Gigantoraptor, estimated around 7.5–8 m (25–26 ft) in length. [ 11 ] [ 12 ] [ 13 ] Other caenagnathids were slightly smaller, such as the 3 m (9.8 ft) long Hagryphus , [ 14 ] or the 3.5 m (11 ft) long Anzu .
Size comparison of megaraptorids. Megaraptorans were medium to large-sized theropods, ranging from Fukuiraptor, which was about 4.2 meters (13.8 feet) in length, to the 8.4 meter (27.6 feet) long Orkoraptor, the 9 to 10 meter (30 to 33 feet) long Maip [5] and the 12.8 meter (42 foot) long Bahariasaurus, if it is a member. [9]
Other possible oviraptorids include Nomingia gobiensis, Gigantoraptor erlianensis, Jiangxisaurus ganzhouensis and Shixinggia oblita. All four have been suggested to be oviraptorids, caenagnathids, or more primitive than either group. In 2020, during their description of Oksoko, the cladogram recovered by Funston et al. is shown below. [3]
A fact from Gigantoraptor appeared on Wikipedia's Main Page in the Did you know column on 17 June 2007. The text of the entry was as follows: The text of the entry was as follows: Did you know ... that Gigantoraptor , a bird-like dinosaur discovered in Inner Mongolia , is thirty-five times larger than its peacock -sized relative, Caudipteryx ?
Citipati was a large-bodied oviraptorid, with the largest individuals being emu-sized animals; it has been estimated at 2.5–2.9 m (8.2–9.5 ft) in length with a weight between 75–110 kg (165–243 lb), [21] [22] [23] and was one of the largest known oviraptorosaurs until the description of Gigantoraptor. [24]