Principal component analyses in the carnivoran forelimb, PC I and PC II.

<p>Bivariate graphs depicted from the two first PCs calculated on the PIC regression residuals (see text for details) for scapula (A), humerus (C), radius (E) and ulna (G). Tree topology is also mapped on the morphospaces. Three-dimensional models showing the shape changes associated to these axes for scapula (B, lateral view), humerus (D, caudal view), radius (F, caudal view) and ulna (H, lateral view) are shown. Blue empty circle: tree root; see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0085574#pone-0085574-g003" target="_blank">figure 3</a> for more symbols. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0085574#pone.0085574.s001" target="_blank">file S1</a>: table S1 for species labels. For the interactive three-dimensional shape models explained by the PCs, see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0085574#pone.0085574.s005" target="_blank">file S4, A–D</a>.