▁O ste ob orus ▁until ▁recently , ▁but ▁the ▁gener a ▁are ▁now ▁considered ▁syn onym s . ▁Bor oph ag us ▁par v us ▁possibly ▁led ▁a ▁hy ena - like ▁l ifest yle ▁sc av eng ing ▁car c ass es ▁of ▁recently ▁dead ▁animals . ▁ ▁Tax onomy ▁Par ac yn arct us ▁was ▁named ▁by ▁Wang ▁et ▁al . ▁( 1 9 9 9 ). ▁Its ▁type ▁is ▁Par ac yn arct us ▁s inc la iri . ▁It ▁was ▁assigned ▁to ▁C yn arct ina ▁by ▁Wang ▁et ▁al . ▁( 1 9 9 9 ). ▁ ▁Mor ph ology ▁Typ ical ▁features ▁of ▁this ▁genus ▁are ▁a ▁bul ging ▁fore head ▁and ▁powerful ▁j aws ; ▁it ▁was ▁probably ▁a ▁sc aven ger . ▁Its ▁cr ushing ▁prem olar ▁teeth ▁and ▁strong ▁j aw ▁mus cles ▁would ▁have ▁been ▁used ▁to ▁crack ▁open ▁b one , ▁much ▁like ▁the ▁hy ena ▁of ▁the ▁Old ▁World . ▁The ▁adult ▁animal ▁is ▁estimated ▁to ▁have ▁been ▁about ▁ ▁in ▁length , ▁similar ▁to ▁a ▁co y ote , ▁although ▁it ▁was ▁much ▁more ▁power fully ▁built . ▁ ▁References ▁▁ ▁Alan ▁Turner , ▁" National ▁Geographic : ▁ ▁Pre histor ic ▁M amm als " ▁( W ashington , ▁D . C .: ▁ ▁Fire c rest ▁Books ▁Ltd ., ▁ 2 0 0 4 ), ▁pp .   1 1 2 – 1 1 4 . ▁▁ ▁X ia oming ▁Wang , ▁" The ▁Origin ▁and ▁E volution