Comparative reconstructions of centrosaurine ceratopsid parietals. A, "Wendiceratops pinhornensis"; B, "Xenoceratops foremostensis"; C, "Centrosaurus apertus"; D, "Styracosaurus albertensis"; E, "Achelousaurus horneri"; F, "Albertaceratops nesmoi"; G, "Pachyrhinosaurus lakustai"; H, "Einiosaurus procurvicornus"; I, "Diabloceratops eatoni".