Safari Ltd  Carnegie Scale Model Amargasaurus With its long tail and extraordinary spine, Amargasaurus roamed the forests of South America. Amargasaurus was small for a sauropod, measuring 30 to 33 feet in length and weighing approximately 2.6 metric tons. Award winning dinosaur replicas are authenticated by the paleontologists of the Carnegie Museum of Natural History, who houses the largest collection of dinosaur fossils in the world. Detailed educational information in 5 languages are provided with each replica. Measurements: 8.39' x 1.17' x 2.93' ( 21.50 cm x 3.00 cm x 7.50 cm.