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 .