Named for the La Amarga geographic formation in Argentina, Amargasaurus is known from an almost entirely complete skeleton that showcases its most distinct feature â€“ two rows of large spines along the back of its neck. History: Amargasaurus was small for a sauropod, measuring only about 33 feet long. The function of its spines isnâ€™t known, though it may have been used the same way modern day antelopes use their horns (to ward off predators who try to attack by leaping onto their backs). Amargasaurus is known from a single, nearly complete skeleton discovered in 1984 by Guillermo Rougier - The only significant piece missing from this specimen was most of the skull. Scientific Name: Amargasaurus cazaui Characteristics:Â Amargasaurus was in many ways a typical sauropod dinosaur, with a long neck and a long tail, meeting in a wide midsection supported by four relatively slender legs. For a sauropod, its neck is comparatively small, and this Amargasaurus toy figure replicates its unique rows of spines along its length. Size and Color:Â The Amargasaurus toy measures a whopping 16 inches long and just over 4 1/2 inches high. The Amargasaurus is part of the Wild SafariÂ® Prehistoric World collection. All of our products are Non-toxic and BPA free.