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 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 was known as the Mansfield Bonebed.