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Biography

Alvarezsaurus (/ˌælvərɛzˈsɔːrəs/; "Alvarez's lizard") is a genus of small alvarezsaurid dinosaur from the Late Cretaceous, living in Argentina approximately 86 – 83 million years ago. Estimates suggest that it measured about 1.4 meters (4.6 ft) in length and weighed approximately 2.27-9.1 kg (5-20 lbs).[1] In 2010, Gregory S. Paul estimated its weight at 3 kg and length at 1 m.[2] 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.[3] The type species is A. calvoi.