Titanosaurus

Titanosaurus is a genus of sauropod from India and possibly Madagascar during the late-cretaceous-period, around seventy-one-million-years ago.

Facts
Titanosaurus is not as well-known as other sauropod as little of them has been found, but they are clearly like any other sauropod (long-neck etc.), and due to its name, it may have been armored.

In the film
A herd of Titanosaurus was seen confronting Heart who was intent on eating one of them. They circle their young and attempt to stomp on Heart when he gets in range domino-style, repeating the process until they became too tired and collapse, with the last one standing knocked out by a kick to the head by Heart. This particular Titanosaurus became Heart's meal until Gonza and two other Tyrannosaurus chase him off.