The researchers determined that Chilesaurus diegoarezi existed on our planet in a legal period approximately 150 million years ago. The dinosaur belonged to the sub-units, but despite that, it was grassy. Scientists estimated that the adult had reached three metres in length, and had external features characterised by dinosaurs of different groups: long necks, short front laps, small head and teeth, in the form of wood leaflets. The researchers are confident that the discovery of Chilesaurus diesuarezi will help scientists learn a lot about the evolution of dinosaurs, particularly therods.