Hypacrosaur Vertebrae With Other Bones In Situ
Hypacrosaur Vertebrae With Other Bones In Situ. Age - 80 - 74 Million Years Old. Bone - Vertebrae with two other bones in situ. Discovered - Northwest Montana, Two Medicine Formation. Hypacrosaurus was a genus of duckbill dinosaurs similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight.
It is known from the remains of two species that spanned 75 to 67 million years ago, in the Late Cretaceous of Alberta, Canada, and Montana, United States, and is the latest hollow-crested duckbill known from good remains in North America. It was an obscure genus until the discovery in the 1990s of nests, eggs, and hatchlings belonging to H.