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Oviraptor (/ ˈ oʊ v ɪ r æ p t ər /; lit. ' egg thief ') is a genus of oviraptorid dinosaur that lived in Asia during the Late Cretaceous period. The first remains were collected from the Djadokhta Formation of Mongolia in 1923 during a paleontological expedition led by Roy Chapman Andrews, and in the following year the genus and type species Oviraptor philoceratops were named by Henry ...
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.
Oviraptorids had short snouts and very deep mandibles. Some taxa (such as Citipati , Corythoraptor , Rinchenia ) had a midline crest on top of the skull, resembling that of a cassowary . Other distinguishing characteristics include a bony spike intruding on the mandibular fenestra , nostrils placed very high and far back on the snout, an ...
The first metacarpal is very short and carries a strongly diverging thumb. The hindlimbs are well-developed and highly elongated: the femur is slender with a distinct head and neck, measuring 1.1 m (3.6 ft); the tibia has similar top and bottom borders and measures 1.10 m (3.6 ft) long; and the metatarsus is 58.3 cm (1.91 ft) long with the ...
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Its skull was highly pneumatized, short, and had a characteristic crest formed by the premaxilla and nasal bones. Both upper and lower jaws were toothless and developed a horny beak. The tail ended in a pygostyle (the fusion of the last caudal vertebrae), which is known to support large rectrices.
Life restoration. Rinchenia was a small-sized oviraptorid, estimated at 1.7 m (5.6 ft) and a body mass of about 25 kg (55 lb). [6] Several features of its skeleton, especially in the skull, show it to be distinct from Oviraptor.
Initially thought to be eggs of a ceratopsian, Protoceratops, they were determined in 1995 actually to belong to the theropod Oviraptor. [5] During that same expedition, Walter W. Granger discovered a skull from the Cretaceous period. In 1925, the museum sent a letter back informing the party that the skull was that of a mammal, and therefore ...