Order †Ornithischia Seeley, 1887 Suborder †Ceratopia Family †Protoceratopidae Genus †Bagataceratops see Genus Bagaceratops Maryanska & Osmólska, 1975 Genus †Leptoceratops Brown, 1914 Genus †Microceratops Bohlin, 1953, nom. illeg. Genus †Montanoceratops Sternberg, 1951 Genus †Protoceratops Granger & Gregory, 1923