. ▁The ▁top ▁of ▁the ▁sk ull ▁was ▁flat , ▁the ▁highest ▁point ▁being ▁just ▁in ▁front ▁of ▁the ▁or bits ▁and ▁s lop ing ▁down ▁towards ▁both ▁the ▁read ▁of ▁the ▁sk ull ▁and ▁the ▁tip ▁of ▁the ▁sn out . ▁This ▁makes ▁Our an osa urus ▁have ▁the ▁most ▁el ong ate ▁sk ull ▁of ▁any ▁non - had ros aur id , ▁the ▁length ▁being ▁ 3 . 8 ▁times ▁the ▁maximum ▁height , ▁although ▁the ▁sk ull ▁is ▁proportion ally ▁wider ▁than ▁related ▁Mant ell is aur us . ▁ ▁B ones ▁of ▁the ▁sn out ▁are ▁more ▁lo os ely ▁art ic ulated ▁with ▁each ▁other ▁than ▁the ▁b ones ▁of ▁the ▁posterior ▁sk ull . ▁The ▁ ▁are ▁ ▁long , ▁with ▁very ▁deep ▁ ▁as ▁in ▁other ▁ igu an od ont ians . ▁An terior ly , ▁the ▁pre max illa e ▁f lare ▁g ently ▁later ally ▁into ▁a ▁rug ose ▁surface ▁for ▁a ▁be ak , ▁like ▁other ▁ igu an od ont ians , ▁although ▁dis similar ▁from ▁I gu an odon ▁and ▁similar ▁to ▁had ros aur ids ▁the ▁n ares ▁are ▁entirely ▁visible ▁from ▁above . ▁Ne ither ▁pre max illa ▁be ars ▁any ▁teeth , ▁although ▁the ▁very ▁anterior ▁tip ▁has ▁" pse udo - te eth " ▁formed ▁by ▁multiple ▁dent icles ▁on ▁the ▁margin ▁of ▁the ▁b one . ▁Only ▁the ▁right ▁max illa ▁of ▁Our an osa urus ▁is ▁known . ▁although ▁it ▁is ▁well ▁preserved