You may be unfamiliar with the term "sauropod," but you're almost certainly familiar with the type of dinosaur: the large, long-necked, enormous animals have become a staple of pop culture, from children's toys to movies like "Jurassic Park." The ranks of sauropods include brontosaurus, brachiosaurus and apatosaurus, and possessed long tails and matching necks, trunk-like legs, and small heads compared to the rest of their bodies.
Within this broader class of massive dinosaurs there is a subgroup known as titanosaurs. They included dinosaurs like the Patagotitan, the Notocolossus, the Puertasaurus and the Argentinosaurus. And the lineage of titanosaurs just got a little longer: A newly-discovered species has become the oldest titanosaur known to have existed, according to a new study.
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