Sail backs were all the rage back in the Mesozoic. Some spinosaurs had them, with Spinosaurus itself bearing one of the most ornate of all, as well as the herbivorous Ouranosaurus, the shark-finned Concavenator, and the strange Deinocheirus, among others. And now, thanks to paleontologist José Miguel Gasulla and colleagues, another high-spined dinosaur has joined the club.

The Early Cretaceous herbivore, named Morelladon beltrani, didn’t have the most ornate ornament of the various sailbacks. The tall spines would have given it more of a high, narrow bump, superficially similar to the midline ridge of the carnivorous Acrocanthosaurus that was terrorizing North America around the same time.

What has continued to