Large sauropod dinosaur with heavy body, elephantine legs, and long neck and tail
Cetiosaurs are members of the sauropod family of dinosaurs which have heavy bodies, elephantine legs and feet, and long necks and tails. They are plant-eaters who live in small family groups, and are normally peaceful if not threatened. However, their sheer bulk makes them formidable opponents if aroused.
Basic Fantasy Field Guide Omnibus
Jurassic herbivore, earlier relative of the other types
Large quadrupedal herbivores with elephantine bodies and extremely long necks and tails, the sauropods are herd animals. They can bite, but are only really dangerous when they trample. Trampling automatically kills any creature weighing less than a ton in their path—saving throw vs death to avoid. A whole herd stampeding is an impressive sight, best viewed from a safe distance. In fantasy gaming environments sauropods might make good meat animals or beasts of burden.
OSRIC