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Supersaurus (meaning "super lizard") is a genus of diplodocid sauropod dinosaur that lived in North America during the Late Jurassic period. The type species, S. vivianae, was first discovered by Vivian Jones of Delta, Colorado, in the middle Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago during the Jurassic Period.

Supersaurus is among the largest dinosaurs known from good remains, possibly reaching 33–34 meters (108–112 ft) in length, and a weight of 31.8–36.3 metric tons.

This 2.4 meter (8 ft) foot long scapula is from the type specimen. It was found in Dry Mesa, Colorado. The original specimen is in the BYU collection.