Representative vertebrae of <i>Tazoudasaurus naimi</i>.

<p>Anterior (top), left lateral (middle), and posterior (bottom) views of mid-cervical (ca. cv 6), anterior dorsal (ca. dv 1), posterior dorsal (ca. dv 10), and anterior caudal (ca. ca 1) vertebrae. Specimens come from several individuals referred to <i>Tazoudasaurus</i> and are scaled relative to one another. Mid-cervical vertebra CSPGM To1-354 is reversed from the original right lateral view. Important changes include reduction of the size of the cdf along the vertebral column. Diapophyseal fossae are in blue, prezygapophyseal fossae are in green, postzygapophyseal fossae are in yellow, and parapophyseal fossae are in orange. Images are modified from <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0017114#pone.0017114-Allain1" target="_blank">[29]</a>:figs. 9, 11, 14–16). Abbreviations, <b>ca</b>, caudal vertebra; <b>cdf</b>, centrodiapophyseal fossa; <b>cpol-f</b>, centropostzygapophyseal lamina fossa; <b>cpaf</b>, centroparapophyseal fossa; <b>cpof</b>, centropostzygapophyseal fossa; <b>cprf</b>, centroprezygapophyseal fossa; <b>cprl-f</b>, centroprezygapophyseal lamina fossa; <b>cv</b>, cervical vertebra; <b>dv</b>, dorsal vertebra; <b>pa</b>, parapophysis; <b>pacdf</b>, parapophyseal centrodiapophyseal fossa; <b>pacprf</b>, parapophyseal centroprezygapophyseal fossa; <b>pocdf</b>, postzygapophyseal centrodiapophyseal fossa; <b>posdf</b>, postzygapophyseal spinodiapophyseal fossa; <b>prcdf</b>, prezygapophyseal centrodiapophyseal fossa; <b>prcpaf</b>, prezygapophyseal centroparapophyseal fossa; <b>prpadf</b>, prezygapophyseal paradiapophyseal fossa; <b>prsdf</b>, prezygapophyseal spinodiapophyseal fossa; <b>sdf</b>, spinodiapophyseal fossa; <b>spdl</b>, spindodiapophyseal lamina; <b>spof</b>, spinopostzygapophseal fossa; <b>sprf</b>, spinoprezygapophseal fossa; <b>sprl</b>, spinoprezygapophyseal lamina; <b>spol-f</b>, spinopostzygapophyseal lamina fossa.