Diamantinasaurus was a large and robust sauropod. This titanosaur reached an adult size of roughly 50-60 feet long and weighed over 15-20 tons. Diamantinasaurus is a relatively recent find. This sauropod was found in the same rocks that held the bones of the theropod Australovenator and a number of other species of plants and animals. Diamantinasaurus lived in Australia about 100 million years ago.