Alvarezsaur
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Alvarezsaur
| Alvarezsaurs Temporal range: Late Jurassic-Late Cretaceous, 160–65.5 Ma |
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| Reconstructed skeleton of a Mononykus olecranus | |
Scientific classification  |
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| Phylum: | Chordata |
| Class: | Reptilia |
| clade: | Dinosauria |
| clade: | Theropoda |
| Branch: | †Alvarezsauria Bonaparte, 1991 |
| Superfamily: | †Alvarezsauroidea Bonaparte, 1991 |
| Type species | |
| Alvarezsaurus calvoi Bonaparte, 1991 |
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| Subgroups | |
Alvarezsauroidea is a group of small maniraptoran dinosaurs. Alvarezsauroidea, Alvarezsauridae, and Alvarezsauria are named for the historian Don Gregorio Alvarez, not the more familiar physicist Luis Alvarez, who proposed that the Cretaceous–Paleogene extinction event was caused by an impact event. The group was first formally proposed by Choiniere and colleagues in 2010, to contain the family Alvarezsauridae and non-alvarezsaurid alvarezsauroids, namely Haplocheirus.[1]
References
- ^ Choiniere, J.N., Xu, X., Clark, J.M., Forster, C.A., Guo, Y. and Han, F. (2010). "A basal alvarezsauroid theropod from the early Late Jurassic of Xinjiang, China." Science, 327: 571-574. doi:10.1126/science.1182143 PMID 20110503
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