 Diplodocus

Diplodocus (, , or ) is a genus of diplodocid sauropod dinosaurs whose fossils were first discovered in 1877 by S. W. Williston.The generic name, coined by Othniel Charles Marsh in 1878, is a neo-Latin term derived from Greek διπλός ("diplos") "double" and δοκός (dokos) "beam", in reference to the double-beamed chevron bones located in the underside of the tail, which were then considered unique.