. ▁There ▁were ▁gener a ▁with ▁small ▁clubs ▁on ▁their ▁t ails , ▁like ▁Sh un osa urus , ▁and ▁several ▁tit an osa urs , ▁such ▁as ▁Salt as aur us ▁and ▁A mp el osa urus , ▁had ▁small ▁b ony ▁o ste od erm s ▁covering ▁port ions ▁of ▁their ▁bodies . ▁ ▁Te eth ▁ ▁A ▁study ▁by ▁Michael ▁D ’ Em ic ▁and ▁his ▁colle agues ▁from ▁St ony ▁Brook ▁University ▁found ▁that ▁sau rop ods ▁evol ved ▁high ▁to oth ▁replacement ▁rates ▁to ▁keep ▁up ▁with ▁their ▁large ▁app et ites . ▁The ▁study ▁suggested ▁that ▁N ig ers aur us , ▁for ▁example , ▁replaced ▁each ▁to oth ▁every ▁ 1 4 ▁days , ▁Cam ar as aur us ▁replaced ▁each ▁to oth ▁every ▁ 6 2 ▁days , ▁and ▁Di pl od ocus ▁replaced ▁each ▁to oth ▁once ▁every ▁ 3 5 ▁days . ▁The ▁scient ists ▁found ▁qual ities ▁of ▁the ▁to oth ▁affected ▁how ▁long ▁it ▁took ▁for ▁a ▁new ▁to oth ▁to ▁grow . ▁Cam ar as aur us ' s ▁teeth ▁took ▁longer ▁to ▁grow ▁than ▁those ▁for ▁Di pl od ocus ▁because ▁they ▁were ▁larger . ▁▁ ▁It ▁was ▁also ▁noted ▁by ▁D ' Em ic ▁and ▁his ▁team ▁that ▁the ▁differences ▁between ▁the ▁teeth ▁of ▁the ▁sau rop ods ▁also ▁indicated ▁a ▁difference ▁in ▁di et . ▁Di pl od ocus ▁a te ▁plants ▁low ▁to ▁the ▁ground ▁and ▁Cam ar as aur us ▁brow sed ▁leaves ▁from ▁top