Dinosaur Records Handy Dinosaur Stats | Largest (by length) Smallest (by length) |  Heaviest | Longest Names Distribution of Body Weight

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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.

Feet	Meters	Name	Order
150 ft	42.7 m	Seismosaurus	Saurischia
120 ft	36.6 m	Argentinosaurus	Saurischia
100 ft	30.5 m	Brachiosaurus	Saurischia
100 ft	30.5 m	Supersaurus	Saurischia
100 ft	30.5 m	Ultrasauros	Saurischia
89 ft	27.1 m	Barosaurus	Saurischia
89 ft	27.1 m	Diplodocus	Saurischia
75 ft	22.9 m	Apatosaurus	Saurischia
72 ft	21.9 m	Haplocanthosaurus	Saurischia
69 ft	21.0 m	Alamosaurus	Saurischia
69 ft	21.0 m	Laplatasaurus	Saurischia
69 ft	21.0 m	Mamenchisaurus	Saurischia
66 ft	20.1 m	Bothriospondylus	Saurischia
65 ft	19.8 m	Titanosaurus	Saurischia
60 ft	18.3 m	Camarasaurus	Saurischia
51 ft	15.5 m	Shantungosaurus	Ornithischia
50 ft	15.2 m	Austrosaurus	Saurischia
50 ft	15.2 m	Cetiosauriscus	Saurischia

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