sˈɛvɹəl θˈɪkənd bˈoʊni ɹˈɪdʒᵻz ɹˈæn ɐlˈɔŋ ðə dˈoːɹsəl mˈɪdlaɪn ʌvðə snˈaʊt ænd bᵻtwˌiːn ðɪ ˈaɪz, ænd sˈɛvɹəl pˌeɪliːoʊntˈɑːlədʒˌɪsts hæv sədʒˈɛstᵻd ðæt ðeɪ hˈɛlpt ðə skˈʌl tə wɪðstˈænd stɹˈɛs wɛn ðɪ ˈænɪməl bˈɪt pɹˈeɪ.
Several thickened bony ridges ran along the dorsal midline of the snout and between the eyes, and several paleontologists have suggested that they helped the skull to withstand stress when the animal bit prey.