 Several species of "Diplodocus" were described between 1878 and 1924.The first skeleton was found at Cañon City, Colorado, by Benjamin Mudge and Samuel Wendell Williston in 1877, and was named "Diplodocus longus" ('long double-beam') by paleontologist Othniel Charles Marsh in 1878.Although not the type species, "D. carnegii" is the most completely known and most famous species due to the large number of casts of its skeleton in museums around the world.