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Gigantoraptor size (holotype) compared to a 1.8-metre-tall (5.9 ft) human. 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 ...
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 beak was similar to that of ducks, which indicates it may have likewise foraged in water, or browsed near the ground like some sauropods and hadrosaurs. The attachment sites for the muscles that open and close the jaws were very small in comparison to the size of the skull, which indicates Deinocheirus had a weak bite force. The skull was ...
Size comparison of three specimens of Citipati (holotype, Big Auntie and Big Mama) 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 ...
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 9 meter (30 feet) long Aerosteon, the 9 to 10 meter (30 to 33 feet) long Maip [11] and the 12.8 meter (42 foot) long Bahariasaurus, if it is a member. [7]
Size comparison of Caudipteryx species to a human. Caudipteryx was a small theropod, measuring 72.5–89 cm (2 ft 4.5 in – 2 ft 11.0 in) long and weighing about 5 kg (11 lb) based on femur length. [1] [2] [6] Like many other maniraptorans, has a mix of reptile- and bird-like anatomical features. [7]
Beibeilong was a notably large caenagnathid and among the largest oviraptorosaurs, estimated at 7.5 m (25 ft) long (extrapolated from the large embryo and eggs) with a ponderous weight of about 1.5–2 metric tons (1.7–2.2 short tons), based on comparisons with the closely related Gigantoraptor.
Size comparison of Hagryphus. As the specific name indicates, Hagryphus giganteus was a particularly large oviraptorosaur, estimated by the describers to have been approximately three meters (10 ft) long, which makes it one of the largest members of the clade Oviraptorosauria (Barsbold, 1976), apart from the later described Gigantoraptor.