Up to 24 feet long (7.3 meters), 1.5 tons
Large size
Long Tail
Canada/USA, North America
Early Cretaceous 120-110 Ma
First appearance: "Gang Killers" (only appearance)

Tenontosaurus is a genus of medium- to large-sized ornithipod dinosaur that lived during the Early Cretaceous period, about[118-95], in North America (Montana).

This dinosaur appears in the third episode ”Gang killers” In the film a tenontosaurus herd was walking though the canyon in search of food. A deinonychus pack caused a stampede leaving a weak one behind. The raptors know that he is healthy and dangerous he killed 3 members of the raptors slapping them with its tail and crushing one by rolling. The raptors reatreat as the wounded Tenotosaurus searches for cover in the forest from a storm. he does not know that raptors have excellent night vision. They found him and begin attacking him once more he manages to kill 4 more members by crushing them with its feet slamming them into rocks and using its tail. In the end it lost all of its energy and collapses and dies


Measuring up to 24 feet (7.3 meters) long, standing more than 8 feet tall, and weighing 1.5 tons, Tenontosaurus (or "sinew lizard") spent most of its time on all fours; it had thicker front limbs than other iguanodontians (advanced beaked dinosaurs) in order to support its body weight.

Fighting styleEdit

Tenontosaurus was large but mostly defenseless, with no body armor to protect it from attack. Its size was its only defense; it was much larger than some of its predators, such as the raptor dinosaur Deinonychus.


Strength: Use their body to crush their enemy's to wall and their powerful tail is able to whip far distance to kill in a single hit.

Speed: Since it was lighter than Edmontosaurus, it could probably run about 35 mph.

Scenes: Was strong enough to help to smell their predators

Endurance and Stamina: Even though it didn't have any armor can fight for entire day by taking many damage from the raptors before getting exhausted.

Weapons: Feet, tail, head and body size


Tenotosaurus was a plant-eater that was targeted by predators such as Deinonychus, which hunted in packs in order to overwhelm the much larger Tenontosaurus. Numerous Deinonychus fossils have been found buried with a single Tenontosaurus skeleton, suggesting that the raptors might not have survived the attack.


  • Because of their ability to evolve into different body types, iguanodotians were one of the most long-lived and diverse groups of ornithiscian dinosaurs. Tenontosaurus was one of the first to split off from the typical body type, growing considerably bigger than its relatives and walking on all fours.