(A) Placement of the individuals on PC1 and PC2 in the shape space (principal components analysis of the Procrustes shape coordinates using all landmarks and semilandmarks of the 60 individuals). Boys are denoted by filled symbols while empty symbols denote girls. Unaffected, LUCS, RUCS, and BCS skulls are represented by circles, diamonds, triangles, and squares, respectively. (B) Placement of the individuals on PC1 and PC2 when the symmetric component of shape variation is studied. (C) Placement of the individuals on PC1 and PC2 when the asymmetric component of shape variation is studied.