Diplodocus

The Diplodocus is a dinosaur that lived 150-145 million years ago during the late Jurassic period. It was a minor character in Disney's 1940 film Fantasia appearing in the "Rite of Spring" segment.

Fantasia
The Diplodocus is first seen in the film eating with the other herbivorous dinosaurs. When Tyrannosaurus Rex appeared on the scene, like the other dinosaurs, it panics and runs away. After Stegosaurus is defeated, Diplodocus leaves the valley with the other Dinosaurs. Later, it is seen struggling to find food and water. its final appearance is when it gets stuck in a tar pit and dies of heat exhaustion.

In real life
In real life, Diplodocus lived in the Jurassic Period 150-145 million-years-ago, at the same time as Stegosaurus and Ceratosaurus. Thus, it did not coexist with Triceratops, Parasaurolophus, or Tyrannosaurus Rex, all of which lived in the Cretaceous Period 68-65 million-years-ago.