A group of saurischian dinosaurs which includes large, quadrapedal forms such as Apatosaurus(Brontosaurus), Brachiosaurus, and Diplodocus Geologic Range: Early to Late Jurassic

A major group of saurischian (or 'lizard-hipped' dinosaurs). (The other major group of saurischians was the theropods.) Apart from the most primitive types, sauropods were massive, four-legged, long-necked herbivorous dinosaurs like Apatosaurus and Mamenschisaurus.

large, quadrupedal, plant-eating dinosaurs, such as Apatosaurus .