Amargasaurus (am-arg-ah-sore-us) is a sauropod from the Early Cretaceous of Argentina which was closely related to Bajadasaurus. Only one partial fossil skeleton, discovered in February 1984, is known.
Characteristics[]
Amargasaurus was a relatively small Sauropod. Based on the currently known remains, the maximum estimated length for Amargasaurus is 10 meters. The maximum estimated height is 2.7 meters. The mass of Amargasaurus could probably reach 2,600 kg.
The most notable feature of Amargasaurus is a series of spines running along the back of its neck.
The living creature[]
The use of the spines is not yet known. However, it has been suggested that it turned them toward oncoming predators, perhaps forcing them to abort their attacks.
Importance[]
The series of spines made Amargasaurus a standout Sauropod. The use of them has been debated. Earlier reconstructions put a sail running between them, comparable to the theropod Spinosaurus. However, this is no longer thought to have been present.
If the spines were indeed used against predators, they add to the list of Sauropods that break the "generic" form for protection. Other specializations in other Sauropods include armor in Saltasaurus and a tail club in Shunosaurus.