What is Diplodocus?
{{italictitle}} {{Taxobox | name = ''Diplodocus'' | fossil_range = [[Upper Jurassic]] | image = Diplodocuspl04.jpg | image_width = 250px | regnum = [[Animal]]ia | classis = [[Reptile|Sauropsida]] | superordo = [[Dinosaur]]ia | ordo = [[Saurischia]] | infraordo = [[Sauropoda]] | familia = [[Diplodocidae]] | genus = '''''Diplodocus''''' | genus_authority = [[Othniel Charles Marsh|Marsh]], 1878}} '''''Diplodocus''''' is a huge dinosaur from the same time as the ''[[Allosaurus]]''. It lived during the [[Upper Jurassic]] period, about 145 to 155 million years ago. It was a vegetarian, eating mostly leaves with its peg-like teeth. == Size == ''Diplodocus'' was a long-necked, whip-tailed giant and could grow up to 27 [[metre|m]] long. It had an 8 [[metre|m]] long neck and 14 [[metre|m]] long [[tail]]. Its weight was approximately 22,680 [[kilogram|kg]]. It had a short 6&nbsp;ft long head. Its size helped protect it from other dinosaurs. It used its long neck to poke into forests because its body was too big. It is also believed to have knocked the trees down. The longest species is the ''hallorum'', which was thought to be the longest of all dinosaurs (now ''[[Amphicoelias]]''). == Fossils == ''Diplodocus'' skeletons are among the longest dinosaur skeletons ever found. Fossils were discovered in Western North America, particularly in the [[Rocky Mountains]] of the western USA. A complete tail has never been found. == ''Seismosaurus'' == ''Seismosaurus'' was thought to be its own [[genus]] of dinosaur. In 2004 and 2006 it was decided to be a large species of ''Diplodocus''.<ref>Lucas S. ''et al'' 2004. [http://gsa.confex.com/gsa/2004AM/finalprogram/abstract_77727.htm Reappraisal of ''Seismosaurus'', a late Jurassic sauropod dinosaur from New Mexico.] {{Webarchive|url=https://web.archive.org/web/20191008110318/http://gsa.confex.com/gsa/2004AM/finalprogram/abstract_77727.htm |date=2019-10-08 }} ''The Geological Society of America'', 2004 Denver Annual Meeting.</ref><ref>{{cite book|title=Paleontology and geology of th