Mercuriceratops

Mercuriceratops is an extinct genus of chasmosaurine ceratopsid dinosaur known from the Late Cretaceous (Campanian stage) of Alberta, Canada and Montana, USA. It contains a single species, Mercuriceratops gemini, represented only by two squamosal bones collected from approximately time equivalent sections of the upper Judith River Formation and the lower Dinosaur Park Formation. Mercuriceratops is the oldest chasmosaurine known from Canada, and the first pre-Maastrichtian ceratopsid to have been collected on both sides of the Canada–US border.