By Bianca Nogrady Updated December 08, 2015 07:24:07 Photo: An artist’s impression of animals that lived 235 million years ago in northwestern Argentina. Fossils identified in this area consist of ancient mammal relatives Dinodontosaurus (left background) and Magssetognathus (left foreground) and early dinosaur relatives Lewisuchus (right background) and Lagerpeton (right foreground). (Victor Leshyk) Map: Argentina…