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View full size image. One of the best-known sauropods (long-necked herbivorous dinosaurs), this genus of dinosaur lived during the late Jurassic Period, about 155.7 million to 150.8 million years ago, and primarily roamed western North America.
Long-necked dinosaurs such as Diplodocus probably had less-flexible necks than previously thought, new research suggests. For the study, published Wednesday (Aug. 14) in the journal PLOS ONE, researchers analyzed the movements of ostrich necks in order to gain insight into how long-necked dinosaurs may have moved.aulty model. Ever since sauropods, or long-necked dinosaurs such as Diplodocus and Apatosaurus were first discovered, people debated why these majestic beasts had such long necks. The massive creatures â the biggest ever to walk the Earth â had absurdly long necks that could grow up to 50 feet (15 meters) long.