ium . ▁▁▁ ▁Un like ▁its ▁modern ▁c ous ins , ▁which ▁are ▁either ▁adapted ▁for ▁desert ▁or ▁al pine ▁conditions , ▁Po eb ro ther ium ▁took ▁the ▁place ▁of ▁a ▁gaz elle ▁or ▁de er ▁in ▁the ▁White ▁River ▁Fa una ▁e cos ystem . ▁This ▁trait ▁was ▁taken ▁to ▁an ▁extreme ▁in ▁later ▁cam els , ▁not ably ▁St en om yl us . ▁F oss il ▁evidence ▁has ▁shown ▁that ▁Po eb ro ther ium ▁was ▁a ▁popular ▁pre y ▁item ▁for ▁the ▁ent el od ont ▁Arch ae other ium . ▁Rem ains ▁of ▁partial ▁Po eb ro ther ium ▁car c ass es ▁have ▁been ▁found ▁foss il ized , ▁and ▁appear ▁to ▁have ▁been ▁killed ▁and ▁cached ▁by ▁Arch ae other ium , ▁the ▁only ▁animal ▁known ▁from ▁the ▁White ▁River ▁e cos ystem ▁that ▁could ▁have ▁made ▁the ▁feed ing ▁marks ▁found ▁on ▁the ▁b ones ▁of ▁Po eb ro ther ium . ▁ ▁Rel ations hips ▁Po eb ro ther ium ▁lies ▁within ▁the ▁cla de ▁Cam el idae , ▁which ▁can ▁be ▁defined ▁as ▁( S ten om yl inae ▁+ ▁( M i ol ab inae ▁+ ▁( Pro tol ab inae ▁+ ▁Cam el inae ))) ▁+ ▁Po eb ro ther ium . ▁As ▁such , ▁Po eb ro ther ium ▁lies ▁outside ▁the ▁Cam el inae ▁proper . ▁In ▁fact ▁the ▁definition ▁of ▁Cam el idae ▁is ▁the ▁most ▁recent ▁common ▁ancest or ▁of ▁Po eb ro ther ium ▁and