▁could ▁not ▁compens ate ▁for ▁the ▁lack ▁of ▁a ▁greater ▁area ▁of ▁attachment ▁for ▁the ▁j aw ▁mus cle , ▁that ▁the ▁open ings ▁normally ▁would ▁provide , ▁allowing ▁for ▁more ▁power ▁and ▁a ▁stronger ▁b ite . ▁A ▁less er ▁mus cle , ▁the ▁mus cul us ▁de press or ▁mand ib ula e , ▁used ▁to ▁open ▁the ▁lower ▁j aws , ▁was ▁located ▁at ▁the ▁back ▁of ▁the ▁sk ull ▁and ▁was ▁connected ▁to ▁a ▁strongly ▁project ing , ▁broad ▁and ▁anterior ly ▁ob lique ▁process us ▁par oc cip ital is . ▁Our an osa urus ▁probably ▁used ▁its ▁teeth ▁to ▁che w ▁up ▁t ough ▁plant ▁food . ▁A ▁di et ▁has ▁been ▁suggested ▁of ▁leaves , ▁fruit , ▁and ▁se eds ▁as ▁the ▁che wing ▁would ▁allow ▁to ▁free ▁more ▁energy ▁from ▁high ▁quality ▁food ; ▁the ▁wide ▁be ak ▁on ▁the ▁other ▁hand ▁indicates ▁a ▁special isation ▁in ▁e ating ▁large ▁amounts ▁of ▁low ▁quality ▁f od der . ▁Our an osa urus ▁lived ▁in ▁a ▁river ▁delta . ▁ ▁Hist ology ▁Our an osa urus ▁be ars ▁more ▁similar ities ▁to ▁other ▁derived ▁ igu an od ont s ▁than ▁more ▁bas al ▁orn ith op ods . ▁Rem od eling ▁is ▁present ▁in ▁the ▁sub ad ult ▁par atype , ▁and ▁high ▁v asc ular ▁density ▁and ▁circum fer ential ▁arrangement ▁of ▁the ▁micro structure ▁suggests ▁fast ▁growth . ▁F aster ▁growth ▁occurs ▁in ▁the ▁same ▁ph y log en etic ▁groups ▁as ▁higher