Diplodocidae

Diplodocids, or members of the family Diplodocidae ("double beams"), are a group of sauropod dinosaurs. The family includes some of the longest creatures ever to walk the Earth, including Diplodocus and Supersaurus, some of which may have reached lengths of up to .

==Description== thumb|left|Diplodocus, depicted with spines limited to the mid-line of the back Diplodocids were generally large animals, even by sauropod standards. Thanks to their long necks and tails, diplodocids were among the longest sauropods, with some species such as Supersaurus vivianae and Diplodocus hallorum estimated to have reached lengths of or more. The heaviest diplodocids, such as Supersaurus and Apatosaurus, may have weighed close to 40 tonnes. However, not all diplodocids were so large; the South American species Leinkupal laticauda was one of the smallest diplodocids, with an estimated length of only .