Rose diagrams depicting the orientation of microwear scratches along the tooth row of <i>Prosaurolophus maximus</i> (CMN 2870).

<p>Note that, at the position of the eleventh tooth family, the most prominent mode of scratches shifts from a dorsomesial-ventrodistal orientation mesially to a dorsodistal-ventromesial orientation distally. Where possible, scratch orientations have been standardized to correspond to teeth from the right dentary (0° = mesial, 90° = apical).