Comparison of outline drawings of ankylosaur humeri.

<p>A–G, right humeri in cranial view. A, <i>Sauropelta edwardsi</i> (YPM 5179), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Coombs1" target="_blank">[21]</a>; B, <i>Hungarosaurus tormai</i> (MTM 2007.25.3), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-si1" target="_blank">[55]</a>; C, <i>Crichtonsaurus benxiensis</i> (BXGMV0012), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-L1" target="_blank">[9]</a>; D, <i>Niobrarasaurus coleii</i> (MU 650 VP), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Carpenter9" target="_blank">[65]</a>; E, <i>Ankylosaurus magniventris</i> (AMNH 5214), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Carpenter5" target="_blank">[28]</a>; F, <i>Euoplocephalus tutus</i> (AMNH 5337), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Arbour1" target="_blank">[31]</a>; G, <i>Liaoningosaurus paradoxus</i> (IVPP V12560); H–I, left humerus in cranial view. H, <i>Chuanqilong chaoyangensis</i>; I, <i>Cedarpelta bilbeyhallorum</i> (CEUM 11629), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Carpenter7" target="_blank">[44]</a>; J, <i>Pinacosaurus</i> (MPC 100/1310), redrawn from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104551#pone.0104551-Currie1" target="_blank">[46]</a>. Scale bars in A–F, H–I equal 10 cm; Scale bar in G equals 1 cm; scale bar in J equals 5 cm. [planned for page width].</p>