| Achillesaurus | ||||
|---|---|---|---|---|
| ||||
| Name | Achillesaurus | |||
| Class | Chordata, Reptilia, Dinosauria, Saurischia, Theropoda, Alvarezsauroidea, Alvarezsauridae | |||
| Name Translation | Achilles Lizard | |||
| Period | Santonian (Cretaceous) | |||
| Location | Argentina | |||
| Diet | Insectivore | |||
| Size | Unknown | |||
Achillesaurus manazzonei (named in reference to Achilles' heel, because diagnostic features are found there for this animal) is a genus of alvarezsaurid theropod dinosaur from the Santonian-age Upper Cretaceous Bajo de la Carpa Formation of Rio Negro, Argentina. It was a relatively large, basal alvarezsaurid, and a contemporary of Alvarezsaurus. Achillesaurus is based on MACN-PV-RN 1116, a partial skeleton including a sacral vertebra, four tail vertebrae, part of the left thighbone, shin and foot, and the left ilium. Agustín Martinelli and Ezequiel Vera, who described the specimen, performed a phylogenetic analysis and found their new genus to be an alvarezsaurid with an unresolved relationship to Alvarezsaurus and more derived alvarezsaurids.
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