ロイヤル・ティレル古生物学博物館
"Xenoceratops" is based on CMN (Canadian Museum of Nature) 53282, a parietal. This is a skull bone that in ceratopsids makes up the medial (midline) and part of the lateral borders of the distinctive bony frill. Additional skull bones have also been assigned to the genus, including additional parietals, squamosals (bones which make up the rest of the frill's lateral borders), and a partial nasal. These bones appear to belong to at least three adult-sized individuals. Another fragmentary skull in the collections of the Royal Tyrrell Museum of Palaeontology is thought to belong to this genus as well.