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The latest dinosaur found in Argentina dates back to the Cenomanian period in the Late Cretaceous era, approximately 96 to 93 million years ago. It is scientifically named Sidersaura marae. This prehistoric creature measures up to 20 meters in length, estimated to weigh around 15 tons, and has a very long tail.
The animal belongs to the Rebbachisauridae, which is a large family of sauropod dinosaurs known from scattered fossil remains from South America, Africa, North America, Europe, and Asia. This dinosaur is distinguished from other sauropods by its distinctive teeth. Some species have battery-like teeth, similar to hadrosaurs and ceratopsians.
Sidersaura marae is one of the last rebbachisaurid, but at the same time, it belongs to an ancient lineage in terms of evolution. Fossil bones of Sidersaura marae were found in the Huincul Formation rocks in the Neuquén province, Patagonia, Argentina.
Dinosaur Argentina with Unique Skull Characteristics.
According to the team, one of the characteristics that distinguishes Sidersaura marae from other dinosaurs is the shape of the hemal arch (tailbone), which is star-shaped. In addition, its skull bone is strong, unlike the skull bone of its closest relatives.
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