▁o ste omy el itis ▁( in fection ) ▁of ▁the ▁last ▁remaining ▁verte bra e . ▁Alternatively , ▁the ▁in fection ▁may ▁have ▁come ▁first ▁and ▁led ▁to ▁the ▁end ▁of ▁the ▁tail ▁becoming ▁ne c rot ic ▁and ▁falling ▁off . ▁This ▁is ▁the ▁first ▁example ▁of ▁tail ▁trunc ation ▁known ▁in ▁a ▁non - av ian ▁ther op od ▁din osa ur . ▁ ▁Ont ogen y ▁and ▁growth ▁ ▁Maj ung as aur us , ▁being ▁known ▁from ▁many ▁well - pres erved ▁spec im ens ▁of ▁different ▁ages , ▁is ▁well ▁studied ▁in ▁regards ▁to ▁its ▁growth ▁and ▁development . ▁Through out ▁ont ogen y , ▁the ▁sk ull ▁of ▁Maj ung as aur us ▁( more ▁specifically , ▁the ▁jug al , ▁post orb ital , ▁and ▁quadr ato j ug al ) ▁seems ▁to ▁have ▁become ▁t aller ▁and ▁more ▁robust ; ▁addition ally , ▁the ▁sk ull ▁b ones ▁became ▁more ▁f used ▁and ▁the ▁eye ▁so ckets ▁became ▁proportion ally ▁smaller . ▁This ▁indicates ▁a ▁shift ▁in ▁di et ary ▁prefer ences ▁between ▁ju ven iles ▁and ▁adult s . ▁ ▁Research ▁by ▁Michael ▁D ' Em ic ▁et ▁al ▁indicates ▁that ▁it ▁was ▁among ▁the ▁slow est - g row ing ▁ther op ods . ▁Based ▁on ▁studies ▁of ▁the ▁lines ▁of ▁arrested ▁growth ▁in ▁several ▁b ones , ▁it ▁was ▁found ▁that ▁Maj ung as aur us ▁took ▁twenty ▁years ▁to ▁reach ▁m atur ity , ▁which ▁may ▁have ▁been ▁a ▁result