Sauropoda?

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1. Guest5555
   

   Sauropoda are an infraorder of saurischian ("lizard-hipped") dinosaurs. They are notable for the enormous sizes attained by some species, and the group includes the largest animals to have ever lived on land. Well-known genera include Brachiosaurus, Diplodocus, and Apatosaurus (which, under current classification, includes the genus formerly known as Brontosaurus). Sauropods first appeared in the late Triassic Period, where they somewhat resembled the closely related (and possibly ancestral) group Prosauropoda. By the Late Jurassic (150 million years ago), sauropods were widespread (especially the diplodocids and brachiosaurids). By the Late Cretaceous, those groups had mainly been replaced by the titanosaurs, which had a near-global distribution. However, as with all other non-avian dinosaurs, the titanosaurs died out in the Cretaceous–Tertiary extinction event. Fossilised remains of sauropods have been found on every continent, including Antarctica.
   The name Sauropoda was coined by O.C. Marsh in 1878, and is derived from the Greek for "lizard foot".
   Complete sauropod fossil finds are rare. Many species, especially the largest, are known only from isolated and disarticulated bones. Many near-complete specimens lack heads, tail tips and limbs.

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