Figure 8A–F in Theropod Fossils from the Upper Triassic Dockum Group of Texas, USA, and a Brief Overview of the Dockum Theropod Diversity

Figure 8A–F. Dockum herrerasaurid, posterior dorsal vertebra, TTU-P16789. A. Vertebra in anterior view. B. Posterior view. C. Right lateral view. D. Left lateral view. E. Dorsal view. F. Ventral view. Abbreviations: acdl, anterior centrodiapophyseal lamina; c, vertebral centrum; hsp, hyposphene; htr hypantrum; lf, lateral fossa; nc, neural canal; pap, parapophysis; pcdl, posterior centrodiapophyseal lamina; podl, postzygodiapophyseal lamina; poz, postzygapophysis; prdl, prezygodiapophyseal; prz, prezygapophysis. Hatching indicates the damaged areas. dromaeosaurids, e.g, Deinonychus antirrhopus Ostrom, 1969 femoral ligament (ligamentum capitis femoris) groove cre- (MCZ 4371, MCZ 4142), Bambiraptor feinbergi Burnham et ates a distinct notch on the anteromedial side of the proxial., 2000 (Burnham 2004) and Mahakala omnogovae Turner mal surface as is typical of a dinosauriform femur (Novas et al., 2007. Unfortunately, the iliac blades of all Triassic orni- 1996, Rauhut 2003: character 197). The helical trochanteric thodirans found in southwestern North America are missing fossa, or fossa trochanterica sensu Langer (2004) is highly different portions and therefore, a taxonomic assignment to developed and expanded over the proximal surface, where it genus for TTU-P10082 cannot be made (Nesbitt and Chat- obliterates the typical longitudinal groove of dinosauriforms terjee 2008, pp. 145–146). on the proximal surface of the femur (Fig. 7A, D). TTU-P12531X—The periphery of the proximal surface of Presence of a trochanteric fossa is a good synapomorphy this right femur is slightly eroded (Fig. 7A). The anteromedial for Dinosauromorpha, but this character occurs homoplastituber of the femoral head (sensu Nesbitt 2011) is small and cally in the proximal femur of shuvosaurids, which differs well rounded (Fig. 7B, C), whereas the posteromedial and from the dinosauromorph femur by possesing a distinctly anterolateral tubera are not visible (Fig. 7D, E). The shallow recurved anteromedial tuber (Nesbitt 2011: characters 300,