The scapular posteroventral ridge among Archosauriformes.

<p>Medial side of the scapula in <i>Garjania prima</i> (taken from Ezcurra, Fig 37A in [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198988#pone.0198988.ref047" target="_blank">47</a>]) (A); <i>Vancleavea campi</i> (PEFO 2427)(B); <i>Lewisuchus admixtus</i> (Reprinted from Bittencourt <i>et al</i>., Fig 10C in [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0198988#pone.0198988.ref108" target="_blank">108</a>] under a CC BY license, with permission from Taylor and Francis, original copyright 2014)(C); <i>Eocursor parvus</i> (SAM-K8025)(D); <i>Sarahsaurus aurifontanalis</i> (TMM 33646–3.399)(E); <i>Mussaurus patagonicus</i> (MLP 68-II-27-1)(F), <i>Camarasaurus</i> sp. (FMNH 255122)(G); <i>Allosaurus fragilis</i> (UMNH-VP 10126)(H). The ventromedial ridge is denoted with the arrow. (A), (C), (D), (F) and (H) reversed from right. Not to scale.