|Scientific name :||Anchisaurus polyzelus|
|Time period :||Early Jurassic|
|Primary diet :||Herbivore|
|In the documentary|
|Fatalities caused :||Possibly One Megapnosaurus|
In the early Jurassic segment, a male Anchisaurus feeds on the trees. But then, a pack of Syntarsus is seen hunting the Anchisaurus. One of the predators gets hurt and maybe killed in the process. The pack chases the family of Anchisaurus and corners the male. But just as they prepare for the kill, a Dilophosaurus takes over the hunt. She roars at the Anchisaurus. Then she grabs the basal sauropod's neck with her teeth and slashs him with her hand claws. Then, she forces the Anchisaurus down and kills him. Later, a pair of Anchisaurus see their leader being eaten by another Dilophosaurus. The narrator says they will evolve into the mighty sauropods like Camarasaurus and Apatosaurus.
- Anchisaurus is shown to be larger than Megapnosaurus but in real life it was the quite the opposite.