#epiparietals

CORONOSAURUS
“Crown lizard”
Late Cretaceous, 77 million years ago

This ceratopsid was originally thought to be a species of Centrosaurus. But despite the requisite centrosaurine nose horn, plus additional barbs on its frill (“epiparietals”), Coronosaurus would still have had no trouble wearing a g*****n mask.

(:https://www.deviantart.com/pheaston)