Upon its original description Medusaceratops was thought to represent a chasmosaurine. It was suggested that based on its type material alone, Medusaceratops is unique among Chasmosaurinae in having only three epiparietals (frill spikes) on each side of the frill.
In its initial description, Medusaceratops was considered a chasmosaurine. It was proposed that based solely on its type material, Medusaceratops is unique within Chasmosaurinae for having only three epiparietals (frill spikes) on each side of the frill.