Mamenchisaurus (Jurassic Park)

A Mamenchisaurus is a very large sauropod that appears in the 1997 movie called The Lost World: Jurassic Park. One of the most notable sauropods created by InGen, the mamenchisaur appears to have an unusual long neck and their massive size compared to t-rexes and other dinosaurs. The major differences that the clones had which their real counterparts don't include: their erect necks, tails lacking their clubs, and humps on their bodies.

While they don't appear in the novels, their most notable appearances are from The Lost World: Jurassic Park, where they appeared in the stampede, running away from the hunters led by Peter Ludlow whose plan is to capture the animals and send them to San Diego.

Due to its massive size, it's unlikely that the sauropod would be captured by Ludlow.