Styracosaurus

So, ~boltonartist commented on an earlier deviation that her favourite ceratopsid is Styracosaurus and... well, here's to you.
Styracosaurus ("spiked lizard") was a medium-sized centrosaurine (aroung 5.5 metres long and 1.8 metres tall) characterized by its long, single horn and its llamative neck frill, which sported six (sometimes eight) long horns and smaller ornaments along its edges. Its frill was probably used for display and comunication (for example, recognizing members of its own species).