Apatosaurus is a type of sauropod Dinosaur. It was a herbivore which means it only ate plants. Like other sauropod, this titan had a long neck. Apatosaurus lived in North America during the late Jurassic period, like the other herbivorous dinosaurs like Brachiosaurus, Camarasaurus, Camptosaurus, Dryosaurus, Diplodocus, and Stegosaurus.
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Apatosaurus ajax is an Apatosaurine like its cousin, Brontosaurus excelsus, but Brontosaurus was smaller, has a longer neck and longer legs.