Its skull was short and deep

Length 106 mm

Width 98 mm

which is based on the presence of marine animal fossils found near Dreadnoughtus bones

where it coexisted with other therapsids

Dunkleosteus terrelli Dinocrocuta Its skull was short andDunkleosteus terrelli was a species of arthrodire placoderm fish that existed in the late Devonian period, from approximately 380 to 360 million years ago, in the Frasnian and Famennian. Unlike previous estimates, recent research has shown that Dunkleosteus terrelli did not reach the enormous dimensions previously attributed to it. Instead of 10 meters in length, this armored fish is now believed to have been of a more moderate size, reaching