Andesaurus

Andesaurus had tail bones that were flat at both ends, which is unusual for titanosaurs, and its back vertebrae had extra joints that made its spine stiffer.2

The only known skeleton includes four back vertebrae, 27 tail vertebrae, parts of the hips, a shoulder blade, and a leg bone, but no skull.1

It lived alongside the giant meat-eater Giganotosaurus, one of the biggest predators ever, in the same ancient river system.1

Andesaurus is one of the most primitive titanosaurs known, meaning it branched off early in the group's history.1

Its fossils were found in rocks that were once a braided river, full of sand and gravel, where it probably walked in herds.1

The name honors the Andes Mountains, because the bones were found near them, and also the man who discovered the skeleton, Alejandro Delgado.1