Supersaurus by Moondawg

Supersaurus (meaning "super lizard") is a genus of diplodocid sauropod dinosaur discovered in the Upper Jurassic Morrison Formation of Colorado in 1972.

It is among the largest dinosaurs known from good remains, possibly reaching 33 to 34 meters (108 to 112 ft) in length, and a weight of 35 to 40 tons.

The original fossil remains of Supersaurus yielded only a few bones: the shoulder girdle (type specimen BYU 5500) and a few neck vertebrae. This shoulder girdle (or scapulocoracoid) stood some 2.4 meters (8 ft) tall, if placed on end.

A new and much more complete specimen of Supersaurus, nicknamed 'Jimbo', has been found in Converse County, Wyoming. It is currently being excavated and its bones are being held at the Wyoming Dinosaur Center. Originally, it was thought that Supersaurus was related to the long-necked diplodocid Barosaurus (a member of the subfamily Diplodocinae), but the new specimen makes it clear that Supersaurus is actually more closely related to Apatosaurus (a member of the subfamily Apatosaurinae).