Supersaurus

Supersaurus was definitely one of the largest plant-eaters of all time, and probably one of the largest member of the family that included Diplodocus. At just under 100 feet long, it was as long as three school buses! Its neck alone was 40 feet long.

Supersaurus is known from only a few bones, but these bones are enormous. The first bone found, a scapulacoracoid (shoulder bone) was over eight feet (2.4 m) long. James Jensen, one of North America's most prolific dinosaur hunters, discovered this creature in 1973 and excavated it in 1979. The bones are so large that some are still unprepared. Bones that were originally assigned to Ultrasauros have now been identified as being from Supersaurus.

Download the Jurassic Park Institute Supersaurus fact card

Jurassic Park Franchise
Supersaurus never appeared in any films or novels, though it was mentioned to be among the most largest dinosaurs. It only appears in Jurassic Park III: Park Builder

Trivia

 * Supersaurus is possibly one of the largest dinosaur in the entire franchise.
 * In Jurassic Park III in the Valley of Dinosaurs scene in the back there is a Sauropod with a different build then the Brachiosaurs in the front, so it may be an Apatosaurus, a Diplodocus, a Barosaurus or a Supersaurus. (This is crap. It's a Brachiosaurus. The Nerd who wrotte that needs to get laid asap. He knows it though.)