The largest known dinosaur prior to this find was also found in Argentina, and aptly named the Argentinosaurus. He was 30m to 40m in length and weighed up to 10

The largest known dinosaur prior to this find was also found in Argentina, and aptly named the Argentinosaurus. He was 30m to 40m in length and weighed up to 100 Tonnes. https://en.wikipedia.org/wiki/Argentinosaurus https://en.wikipedia.org/wiki/Argentinosaurus