Auca Mahuevo is a Cretaceous lagerstätte in the eroded badlands of the Patagonian province of Neuquen, Argentina. The sedimentary layers at Auca Mahuevo were laid down 80 million years before present and offer a view of a fossilized titanosaurid sauropod hatchery. The Auca Mahuevo lagerstätte was discovered during two expeditions, in 1997 and 1999, by Luis Chiappe, Lowell Dingus, and Rodolfo Coria, who were looking for fossilized birds. (Coria, R.A. and Chiappe, L.M. 2007) The site is now officially protected, but looted eggs are coming onto the market.