Skulls of Deuterosaurus are well-known from several finds. They were around 80 cm (2 ft 6 in) with a long snout and conical teeth. Like all anteosaurs, the skull possessed long, dagger-like canine teeth. The skull was rather short for an antosaur, with a broad cheek region, indicating a very strong bite. The eyes where partly slanted forward, giving it at least partial stereo vision. The pineal eye, though small, had a well formed opening right atop the brain case.