Original: Lambeosaurus (, meaning "Lambe's lizard") is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period (Campanian) of North America.
Simplified: Lambeosaurus lived during the late Cretaceous period, about 83 to 65 million years ago, at the end of the Mesozoic, the Age of Reptiles.