prosauropod

Any of various saurischian dinosaurs of the group Prosauropoda of the Triassic and Jurassic Periods, having a small head, long neck and tail, serrated teeth, and large thumb claw, and including plateosaurus.

Any member of the Prosauropoda, a group of early herbivorous dinosaurs with a long neck and small head, forelimbs shorter than the hindlimbs, and a very large thumb claw for defense.