Representative vertebrae of <i>Mamenchisaurus youngi</i>.

<p>Anterior (top), left lateral (middle), and posterior (bottom) views of anterior cervical (cv 9), posterior cervical (cv 17), anterior dorsal (dv 2), posterior dorsal (dv 8), and anterior caudal (ca 1) vertebrae. Specimens come from a single individual (holotype ZDM 0083) and are to scale. Posterior view of cv 9 and anterior views of cv 9, cv 17, and dv 8 not available; anterior view of dv 7 used for dv 8. Important changes along the column include the appearance of a pcpl and the division of the cdf into a pacdf and a cpaf. Images are modified from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0017114#pone.0017114-Ouyang1" target="_blank">[33]</a>:figs. 15, 17, 20, 26, 30). Abbreviations and color scheme as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0017114#pone-0017114-g007" target="_blank">Figure 7</a>.