| Alvarezsaurus Temporal range: Late Cretaceous,
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|---|---|
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| Skeleton restoration | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Alvarezsauridae |
| Genus: | †Alvarezsaurus Bonaparte, 1991 |
| Species: | †A. calvoi
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| Binomial name | |
| †Alvarezsaurus calvoi Bonaparte, 1991
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| Synonyms | |
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Alvarezsaurus (/ˌælvərɛzˈsɔːrəs/; "Alvarez's lizard") is a genus of alvarezsaurid dinosaur from the Late Cretaceous, living in Argentina approximately 86 - 83 million years ago. It was a small dinosaur, measuring 1–1.4 m (3.3–4.6 ft) long and weighing approximately 3 kg (6.6 lb).[1][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.
- ^ Holtz Jr., Thomas R. (2012). "Holtz's Genus List" (PDF).
- ^ Paul, Gregory S. (2010). The Princeton Field Guide to Dinosaurs (1st ed.). Princeton University Press. pp. 126. ISBN 978-0691137209. JSTOR j.ctt7sv5n.
- ^ Bonaparte, José F. (1991). "Los vertebrados fósiles de la formación Río Colorado, de la ciudad de Neuquén y cercanías, Cretácico Superior, Argentina" [The fossil vertebrates of the Colorado River formation, from the city of Neuquén and surroundings, Upper Cretaceous, Argentina]. Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". Paleontología (in Spanish). 4 (3): 15–123. ISSN 0524-9511.