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Alvarezsaurus (Template:IPAc-en; "Alvarez's lizard") is a genus of small alvarezsaurid dinosaur from the Late Cretaceous period of Argentina, approximately 86 - 83 million years ago. Estimates suggest that it measured about 2 meters (6.5 ft) in length and weighed approximately 20 kg (45 lbs). It was found in the Bajo de la Carpa Formation and was named by paleontologist José Bonaparte in 1991 after the historian Don Gregorio Alvarez.
File:Alvarezsaurus calvoi.jpg

The type species is A. calvoi. It was bipedal, had a long tail, and its leg structure suggests that it was a fast runner. It may have been insectivorous and was basal to better-known members of its family, such as Mononykus and Shuvuuia. It has been alternately classified with both non-avian theropod dinosaurs and early birds.

In popular culture

Alvarezsaurus was featured in the Discovery Channel television series Dinosaur Planet, where it was presented as a predator of young Saltasaurus. However, these genera did not coexist, Alvarezsaurus being approximately 5 million years older than Saltasaurus.

External links

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