Ceratopsids were flashy dinosaurs. These herbivorous heavyweights were adorned with horns, spikes, hooklets, and bosses that came in a stunning variety of shapes and arrangements, making them look just as sexy to paleontologists searching for new species as the dinosaurs must have looked to their own kind. And despite over a century of research on these animals, researchers are continuing to find ceratopsids that push the boundaries of cranial ornamentation. The latest to be named, Mercuriceratops gemini, had a frill unlike any other.

As with most dinosaurs to make headlines, the 77 million year old Mercuriceratops is only known from fragments. All paleontologists have of the dinosaur are two right squamosals – broad bones that made