How big was the argentinosaurus?

Argentinosaurus is most certainly bigger but it's not very complete. Based on the size of it's large bones it's certainly one of the most massive land animals ever to roam the Earth. Argentinosaurus is a titanosaur sauropod. Because of it's incompletness it's exact length and mass are impossible to know right now. It's mainly known from dorsal vertebra (back bones). The neck and tail are completely unknown and these vary a lot between different sauropods. Length estimates have ranged from 26 to nearly 40m long. Mass estimates have ranged from about 50-100 tons!

Seismosaurus is a diplodocid sauropod was one of the longest dinosaurs. (Currently many paleontologists think Seismosaurus may just be a large specimen of Diplodocus.) It's estimated at 30m long, but a large poportion of this is neck and tail. (Diplodocids have incredibly long tails.) Weight estimates are about 30 tons.

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