.7" Hadrosaurid Caudal Vertebra (Tail Bone)

This is a caudal vertebra (tail bone) from a Hadrosaurid found in the Two Medicine Formation (Judith River Group) of Eastern Montana. The bone is .7" wide and nicely preserved with some surface weathering. There are still large portions of the shiny outer bone surface, but the processes have eroded away completely. There is no restoration.

Within the Judith River Group there are 3 major hadrosaurids, Brachylophosaurus, Kritosaurus, and Lambeosaurus with Brachylophosaurus being the most commonly found. With just a single bone it is hard to differentiate between the different genera and give a definitive identification.