Dinosaurs with Marionette Jaws: The Case for the Predentary in Ornithischians

As I mentioned in a previous post, ornithischian dinosaurs are enormously diverse. From the horned ceratopsians and dome-headed pachycephalosaurs to the armored stegosaurs and ankylosaurs and duck-billed hadrosaurs (and others), they make up a majority of the herbivorous non-avian dinosaur taxa to have ever lived. It’s a well-known fact that the presence of a single…