Edmontosaurus ChevronA hadrosaur chevron is a v shaped bone on the underside of the tail of a duck billed dinosaur that protected nerves & blood vessels. These bones also anchored tendons and ligaments, contributing to the tail's flexibility, strength, and balance. They were part of a series of bones called haemal arches that collectively formed a canal to safeguard the tail's vital structures. Edmontosaurus was a genus of Hadrosaurid "Duck Billed" dinosaur, a huge beast