Largest (by length)
The length of a dinosaur, from the tip of its nose to the tip of its
tail, is one of the standard measurements used to define these animals.
The longest dinosaurs were not necessarily the heaviest or tallest. Diplodocids,
such as Seisosaurus, had long whip-like tails that added greatly to their
length but Argentinasaurus, a titanosaurid, was probably taller and heavier.
Some dinosaurs such as Mamenchisaurus had both very long necks and long
tails. For detailed information about any of the dinosaurs listed below,
click on the name of the dinosaur.