▁inter lock ing ▁rib s ▁and ▁o ss ified ▁tend ons , ▁as ▁well ▁as ▁rein for ced ▁mus cle ▁attachment ▁sites ▁on ▁the ▁verte bra e ▁and ▁the ▁back ▁of ▁the ▁sk ull . ▁These ▁mus cles ▁would ▁have ▁been ▁able ▁to ▁hold ▁the ▁head ▁steady ▁despite ▁the ▁strugg les ▁of ▁its ▁pre y . ▁Ab el is aur id ▁sk ull s ▁were ▁also ▁strength ened ▁in ▁many ▁areas ▁by ▁b one ▁min eral ized ▁out ▁of ▁the ▁skin , ▁creating ▁the ▁characteristic ▁rough ▁texture ▁of ▁the ▁b ones . ▁This ▁is ▁particularly ▁true ▁of ▁Maj ung as aur us , ▁where ▁the ▁nas al ▁b ones ▁were ▁f used ▁and ▁thick ened ▁for ▁strength . ▁On ▁the ▁other ▁hand , ▁the ▁lower ▁j aw ▁of ▁Maj ung as aur us ▁sport ed ▁a ▁large ▁fen estra ▁( open ing ) ▁on ▁each ▁side , ▁as ▁seen ▁in ▁other ▁cer at osa urs , ▁as ▁well ▁as ▁syn ov ial ▁joint s ▁between ▁certain ▁b ones ▁that ▁allowed ▁a ▁high ▁degree ▁of ▁flex ibility ▁in ▁the ▁lower ▁j aw , ▁although ▁not ▁to ▁the ▁extent ▁seen ▁in ▁sn akes . ▁This ▁may ▁have ▁been ▁an ▁adaptation ▁to ▁prevent ▁the ▁f ract ure ▁of ▁the ▁lower ▁j aw ▁when ▁holding ▁onto ▁a ▁struggling ▁pre y ▁animal . ▁The ▁front ▁teeth ▁of ▁the ▁upper ▁j aw ▁were ▁more ▁robust ▁than ▁the ▁rest , ▁to ▁provide ▁an ▁anchor ▁point ▁for ▁the ▁b ite , ▁while ▁the ▁low ▁crown ▁height ▁of ▁Maj ung as aur