▁is ▁quite ▁pla us ibly ▁the ▁cla de ▁of ▁din osa urs ▁with ▁the ▁largest ▁body ▁sizes ▁ever ▁to ▁have ▁existed . ▁The ▁few ▁exceptions ▁of ▁smaller ▁size ▁are ▁hypoth es ized ▁to ▁be ▁caused ▁by ▁island ▁d war f ism , ▁although ▁there ▁is ▁a ▁tr end ▁in ▁T itan osa uria ▁towards ▁a ▁smaller ▁size . ▁The ▁tit an osa urs , ▁however , ▁were ▁some ▁of ▁the ▁largest ▁sau rop ods ▁ever . ▁Other ▁than ▁tit an osa urs , ▁a ▁cla de ▁of ▁di pl od oc oid s , ▁a ▁group ▁of ▁gi ants , ▁called ▁Dic ra e osa ur idae , ▁is ▁identified ▁by ▁a ▁small ▁body ▁size . ▁No ▁sau rop ods ▁were ▁very ▁small , ▁however , ▁for ▁even ▁" d war f " ▁sau rop ods ▁are ▁larger ▁than ▁, ▁a ▁size ▁reached ▁by ▁only ▁about ▁ 1 0 % ▁of ▁all ▁m amm al ian ▁species . ▁ ▁Independent ▁gig ant ism ▁Although ▁in ▁general , ▁sau rop ods ▁were ▁large , ▁a ▁gig antic ▁size ▁( ▁or ▁more ) ▁was ▁reached ▁independently ▁at ▁multiple ▁times ▁in ▁their ▁evolution . ▁Many ▁gig antic ▁forms ▁existed ▁in ▁the ▁Late ▁Jur ass ic ▁( specific ally ▁Kim mer id g ian ▁and ▁Tur onian ), ▁such ▁as ▁the ▁tur ias aur ▁Tur ias aur us ▁and ▁the ▁di pl od oc oid s ▁Am ph ico el ias , ▁Di pl od ocus ▁and ▁Sup ers aur us . ▁Through ▁the ▁Early ▁to ▁Late