Fossils reveal wondrous dinosaur diversity just before mass extinction

Among the fossils are the first recorded theropods from Chilean Patagonia.

A time-averaged artist’s interpretation of Patagonia during the Late Cretaceous. The animals pictured include non-avian dinosaurs, birds and other vertebrates that have been discovered in the fossil record of the region. They are: ornithurine birds (flying and walking on the ground), Stegouros (armored dinosaur), Orretherium (mammal), Yaminuechelys (turtle), a megaraptorid (large carnivore), unenlagiines (pair of carnivores), and enantiornithine birds (in foreground). Credit: Mauricio Alvarez and Gabriel Diaz.