The skull dates back to the Paleogene Period, a time that followed the extinction of the dinosaurs and saw the rapid diversification of many life forms, including mammals. Hyaenodonts were the ...

Dorsal (left) and ventral (right) sides of the fossil skull belonging to Bastetodon syrtos. A left lateral view of Bastetodon syrtos. Based on the shape of the skull and teeth, scientists think ...