▁or ▁fat , ▁res emb ling ▁that ▁of ▁a ▁b ison ▁or ▁cam el , ▁rather ▁than ▁a ▁sail . ▁It ▁could ▁have ▁been ▁used ▁for ▁energy ▁storage ▁to ▁surv ive ▁a ▁lean ▁season . ▁ ▁The ▁ax ial ▁column ▁consisted ▁of ▁eleven ▁neck ▁verte bra e , ▁sevent een ▁d ors al ▁verte bra e , ▁six ▁sac ral ▁verte bra e ▁and ▁forty ▁tail ▁verte bra e . ▁The ▁tail ▁was ▁relatively ▁short . ▁ ▁The ▁front ▁lim bs ▁were ▁rather ▁long ▁with ▁ 5 5 % ▁of ▁the ▁length ▁of ▁the ▁h ind ▁lim bs . ▁A ▁quad ru ped al ▁st ance ▁would ▁have ▁been ▁possible . ▁The ▁hum er us ▁was ▁very ▁straight . ▁The ▁hand ▁was ▁light ly ▁built , ▁short ▁and ▁broad . ▁On ▁each ▁hand ▁Our an osa urus ▁bore ▁a ▁thumb ▁cla w ▁or ▁sp ike ▁that ▁was ▁much ▁smaller ▁than ▁that ▁of ▁the ▁earlier ▁I gu an odon . ▁The ▁second ▁and ▁third ▁digits ▁were ▁broad ▁and ▁hoof - like , ▁and ▁an atom ically ▁were ▁good ▁for ▁walking . ▁To ▁support ▁the ▁walking ▁hypothesis , ▁the ▁w rist ▁was ▁large ▁and ▁its ▁component ▁b ones ▁f used ▁together ▁to ▁prevent ▁its ▁dis location . ▁The ▁last ▁digit ▁( number ▁ 5 ) ▁was ▁long . ▁In ▁related ▁species ▁the ▁fifth ▁finger ▁is ▁pres umed ▁to ▁have ▁been ▁pre hens ile : ▁used ▁for ▁pick ing ▁food ▁like ▁leaves ▁and ▁tw igs ▁or ▁to ▁help ▁lower ▁the ▁food ▁by ▁lower ing ▁branch ▁to