tail ) ▁verte bra , ▁was ▁also ▁found ▁to ▁have ▁an ▁ab normal ▁growth , ▁this ▁time ▁on ▁the ▁top ▁of ▁its ▁neural ▁sp ine , ▁which ▁projects ▁up wards ▁from ▁the ▁verte bra e , ▁allowing ▁mus cle ▁attachment . ▁Similar ▁growth s ▁from ▁the ▁neural ▁sp ine ▁have ▁been ▁found ▁in ▁spec im ens ▁of ▁All osa urus ▁and ▁Mas iak as aur us , ▁probably ▁resulting ▁from ▁the ▁o ss ification ▁of ▁a ▁lig ament ▁running ▁either ▁between ▁the ▁neural ▁sp ines ▁ ▁( inter sp inal ▁lig ament ) ▁or ▁along ▁their ▁to ps ▁( su pr asp inal ▁lig ament ). ▁ ▁The ▁most ▁serious ▁path ology ▁discovered ▁was ▁in ▁a ▁series ▁of ▁five ▁large ▁tail ▁verte bra e . ▁The ▁first ▁two ▁verte bra e ▁showed ▁only ▁minor ▁ab normal ities ▁with ▁the ▁exception ▁of ▁a ▁large ▁gro ove ▁that ▁extended ▁along ▁the ▁left ▁side ▁of ▁both ▁b ones . ▁However , ▁the ▁next ▁three ▁verte bra e ▁were ▁completely ▁f used ▁together ▁at ▁many ▁different ▁points , ▁forming ▁a ▁solid ▁b ony ▁mass . ▁There ▁is ▁no ▁sign ▁of ▁any ▁other ▁verte bra e ▁after ▁the ▁fifth ▁in ▁the ▁series , ▁indicating ▁that ▁the ▁tail ▁ended ▁there ▁prem ature ly . ▁From ▁the ▁size ▁of ▁the ▁last ▁verte bra e , ▁scient ists ▁jud ged ▁that ▁about ▁ten ▁verte bra e ▁were ▁lost . ▁One ▁explanation ▁for ▁this ▁path ology ▁is ▁severe ▁physical ▁tra uma ▁resulting ▁in ▁the ▁loss ▁of ▁the ▁tail ▁tip , ▁followed ▁by