Allometric regression of <i>Stegoceras validum</i> frontoparietal heights against frontoparietal width.

Abbreviations: CI, 95% confidence interval; iso, isometry; +, positive allometry; −, negative allometry; H:n/n, height of the sutural surface at the contact of the nasals; H:n/prf, height of the sutural surface at the contact of the nasal and prefrontal; H:prf/aso, height of the sutural surface at the contact of the prefrontal and anterior supraorbital; H:aso/pso, height of the sutural surface at the contact of the anterior supraorbital and posterior supraorbital; H: pso/po, height of the sutural surface at the contact of the posterior supraorbital and postorbital; T:fp, thickness of the frontoparietal.