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Shuvuuia
Temporal range: Late Cretaceous
Shuvuuia1.jpg
An artist's interpretation of Shuvuuia deserti
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Theropoda
Genus: Shuvuuia
Chiappe, Norell, & Clark, 1998
Species: S. deserti
Binomial name
Shuvuuia deserti
Chiappe, Norell, & Clark, 1998

Shuvuuia was a small and lightly built animal. Only reaching lengths of around 60 cm (2 ft) in length, it is one of the smallest known dinosaurs. The skull is lightly built with long and slender jaws and minute teeth. Shuvuuia is unique among non-avian theropods in the skull's ability to perform prokinesis, that is, it could flex its upper jaw independently of its braincase.

The hindlimbs of Shuvuuia were long, slender, and short-toed, which may indicate significant running capabilities. The forelimbs, however, were unusually short and powerfully constructed. Although originally Shuvuuia and other alvarezsaurids were thought to have only a single digit on the front limb, newer specimens show the presence of reduced second and third fingers in addition to the massively enlarged thumb known from previous specimens. Like other alverezsaurids, Shuvuuia may have used its forelimbs to open insect nests, and its slender, unusually mobile jaws to probe after such prey.
Shuvuuia deserti
Fossils of Shuvuuia are currently known from two locations within the Djadochta Formation: Ukhaa Tolgod and Tögrögiin Shiree. These sites are thought to be about 75 million years old (late Campanian age). Contemporary genera included Velociraptor and Protoceratops.

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