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Mandibular PCA results comparing PC1 and PC2. Each shape represents a species, and each point represents a specimen. Ovals represent 90% confidence intervals for each feeding strategy: grip and tear feeders (dotted line); filter feeders (thin solid line); suction feeders (dashed line); pierce feeders (thick solid line). Wireframe diagrams of the shape changes in the positive and negative direction are shown along each axis.
