Principal axes of shape variation for the mixed-species data.

<p>Top shows the axis of greatest (I) and second greatest (II) variance (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0150368#pone.0150368.s001" target="_blank">S1 Appendix</a> for details). Lower left panel shows visualization of specimen surface with lowest projection (specimen 12, score ≈ -82.6) on axis I. Lower right panel shows the same for the specimen with the highest projection (specimen 6, score ≈ 28.5). Coloring indicates magnitude of displacements due to the vertex regression coefficients. Mean surface is shown in semi-transparent gray for comparison.