Argentinosaurus details:

Argentinosaurus is a genus of a giant sauropod dinosaur. With length estimates ranging from 30 to 40 metres and weight estimates from 50 to 100 tonnes. Argentinosaurus which was deposited in the middle Cenomanian to early Turonian ages, around 96 to 92 million years ago, and contains a diverse dinosaur fauna including the giant theropod Mapusaurus.There have been many previous contenders for the title world's biggest dinosaur. Now the Argentinosaurus's proportions and overall shape are conjectural.