▁about ▁how ▁the ▁W DM ▁uses ▁Guard ▁Band ▁C li pping ▁ ▁Category : C li pping ▁( comput er ▁graphics ) <0x0A> </s> ▁Bor oph ag us ▁par v us ▁is ▁an ▁ext inct ▁species ▁of ▁the ▁genus ▁Bor oph ag us , ▁of ▁the ▁sub family ▁Bor oph ag inae , ▁a ▁group ▁of ▁can ids ▁( b ear - dog ) ▁en demic ▁to ▁North ▁America ▁from ▁the ▁late ▁H emph ill ian ▁of ▁the ▁Mi oc ene ▁epo ch ▁through ▁the ▁P li oc ene ▁epo ch ▁ 1 0 . 3 — 4 . 9 ▁Ma , ▁existing ▁for ▁approximately ▁. ▁ ▁Over view ▁Bor oph ag us , ▁like ▁other ▁Bor oph ag inae , ▁are ▁lo os ely ▁known ▁as ▁" bone - cr ushing " ▁or ▁" hy ena - like " ▁dogs . ▁ ▁Though ▁not ▁the ▁most ▁massive ▁bor oph agine ▁by ▁size ▁or ▁weight , ▁it ▁had ▁a ▁more ▁highly ▁evol ved ▁capacity ▁to ▁cr unch ▁b one ▁than ▁earlier , ▁larger ▁gener a ▁such ▁as ▁Ep icy on , ▁which ▁seems ▁to ▁be ▁an ▁evolution ary ▁tr end ▁of ▁the ▁group ▁( Turn er , ▁ 2 0 0 4 ). ▁During ▁the ▁P li oc ene ▁epo ch , ▁Bor oph ag us ▁began ▁being ▁disp la ced ▁by ▁Can is ▁gener a ▁such ▁as ▁Can is ▁ed ward ii ▁and ▁later ▁by ▁Can is ▁dir us . ▁Early ▁species ▁of ▁Bor oph ag us ▁were ▁placed ▁in ▁the ▁genus