▁one ▁of ▁their ▁div in ities . ▁ ▁The ▁type ▁spec imen ▁of ▁Max ak alis aur us ▁belonged ▁to ▁an ▁animal ▁about ▁ ▁long , ▁with ▁an ▁estimated ▁weight ▁of ▁ 9   tons , ▁although , ▁according ▁to ▁pale ont ologist ▁Alexander ▁K ell ner , ▁it ▁could ▁have ▁reached ▁a ▁length ▁of ▁approximately ▁. ▁It ▁had ▁a ▁long ▁neck ▁and ▁tail , ▁rid ged ▁teeth ▁( un us ual ▁among ▁sau rop ods ) ▁and ▁lived ▁about ▁ 8 0   mill ion ▁years ▁ago . ▁Because ▁sau rop ods ▁seem ▁to ▁have ▁lack ed ▁significant ▁competition ▁in ▁South ▁America , ▁they ▁evol ved ▁there ▁with ▁greater ▁divers ity ▁and ▁more ▁unusual ▁tra its ▁than ▁elsewhere ▁in ▁the ▁world . ▁ ▁" This ▁is ▁the ▁biggest ▁din osa ur ▁yet ▁described ▁in ▁Brazil ," ▁said ▁Alexander ▁K ell ner , ▁lead ▁author ▁of ▁the ▁scientific ▁description . ▁" We ▁have ▁found ▁the ▁b ones ▁of ▁what ▁appear ▁to ▁be ▁larger ▁din osa urs , ▁but ▁we ▁still ▁haven ' t ▁been ▁able ▁to ▁put ▁them ▁together ▁for ▁scientific ▁descri ptions ." ▁ ▁In ▁ 2 0 1 6 , ▁a ▁new ▁spec imen ▁compr ising ▁a ▁dent ary ▁and ▁teeth ▁was ▁described ▁as ▁belonging ▁to ▁Max ak alis aur us . ▁The ▁ph y log en etic ▁analysis ▁recovered ▁Max ak alis aur us ▁as ▁an ▁a e ol osa ur ine ▁along ▁with ▁A e ol osa urus ▁and ▁G ond wan at itan . ▁ ▁A ▁re construct