Occurrence of myorhabdoid ossifications in pachycephalosaurid taxa.

<p>Occurrence of myorhabdoid ossifications in pachycephalosaurid taxa based upon three recent hypotheses of pachycephalosaur relationships: <b>A</b>) Williamson and Carr <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0030212#pone.0030212-Williamson1" target="_blank">[46]</a>; <b>B</b>) Sullivan <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0030212#pone.0030212-Sullivan1" target="_blank">[47]</a>; <b>C</b>) Longrich et al. <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0030212#pone.0030212-Longrich1" target="_blank">[48]</a>. Solid circle demarcates Pachycephalosauridae. Squares indicate taxa with significant postcranial material; white = no evidence of myorhabdoid ossifications, black = articulated myorhabdoid ossifications, grey = disarticulated myorhabdoid ossifications. Solid lines indicate inferred presence of myorhabdoid ossifications based on topology. Taxonomic nomenclature follows that of each original publication.