The Camptosaurus was a dinosaur that was the ancestor to hadrosaurs and iguanodonts.
Camptosaurus in The Land Before TimeEdit
One appears in the introduction sequence to The Big Freeze, attacked by an Tyrannosaurus. However, it jumps underwater and swims into an area with a Hollowhorn on a high cliff, while the Tyrannosaurus heads back to land. It look like a Prosauropods or a Longneck.