. ▁In ▁the ▁lower ▁j aw ▁of ▁A pl est os uch us , ▁the ▁outer ▁sculpt ure ▁of ▁the ▁mand ible ▁is ▁limited ▁to ▁the ▁dent ary , ▁and ▁the ▁oc cip ital ▁surface ▁of ▁the ▁mand ib ular ▁sym ph ysis ▁lack ▁a ▁p eg . ▁Additionally , ▁the ▁rid ged ▁border ▁of ▁the ▁angular ▁is ▁not ▁covering ▁the ▁ro str al ▁edge ▁of ▁the ▁mand ib ular ▁fen estra , ▁and ▁a ▁row ▁of ▁foram ina ▁is ▁present ▁between ▁the ▁mand ib ular ▁fen estra ▁and ▁the ▁e ct opter y go id - j ug al ▁s uture . ▁Some ▁of ▁the ▁non - aut ap omorphic ▁tra its ▁of ▁A . ▁s ord id us ▁listed ▁above , ▁such ▁as ▁the ▁quadr ate ▁de pression , ▁med ial ▁approximation ▁of ▁the ▁pre front als , ▁and ▁r idge ▁on ▁the ▁e ct opter y go id - j ug al ▁art ic ulation , ▁confirm ▁its ▁pla cement ▁within ▁Ba urus uch idae . ▁ ▁Ph y log eny ▁▁ ▁The ▁ph y log en etic ▁position ▁of ▁A pl est os uch us ▁within ▁Ba urus uch idae ▁was ▁investig ated ▁in ▁its ▁original ▁description , ▁God oy ▁et ▁al . ▁( 2 0 1 4 ). ▁A pl est os uch us , ▁along ▁with ▁the ▁recently ▁described ▁b aur us uch ids ▁Camp inas uch us ▁and ▁G ond wan as uch us , ▁were ▁scored ▁into ▁the ▁tax on - character ▁matrix ▁of ▁Monte