The site, known as the Mansfield Bonebed, had initially been interpreted as containing "Styracosaurus", but what earlier authors considered the frill spikes of "Styracosaurus" turned out to be chasmosaurine orbital horns.
The site, known as the Mansfield Bonebed, belongs to the same stratigraphic level as the one the yielded the original "Ceratops" remains. It had initially been interpreted as containing "Styracosaurus", but what earlier authors considered the frill spikes of "Styracosaurus" turned out to be chasmosaurine orbital horns.