Fig. 8 in Quadrupedal dinosaurs did not evolve fully pronated forearms: New evidence from the ulna

Fig. 8. Comparison of standardized views of semi-pronated forearms in ornithischian dinosaurs that utilized quadrupedalism. A. A tracing of a representative neosauropod sauropodomorph, Apatosaurus excelsus (Marsh, 1879) (YPM 1980), in distal view. B. A hadrosaur, Edmontosaurus annectens (Marsh, 1892) (USNM 3814), reversed, in distal view. C. A stegosaur, Stegosaurus sp. (USNM 11659), reversed, in flexor (C1), distal (C2), and pre-axial (C3) views. D. A ceratopsid, Torosaurus cf. latus Marsh, 1891 (high fidelity YPM 57489 cast of MPM VP6841), reversed, in flexor (D1), distal (D2), and pre-axial (D3) views. E. An ankylosaur, Sauropelta edwardsorum Ostrom, 1970 (AMNH 3032), in flexor (E1), distal (E2), and pre-axial (E3) views. Pre-axial views are in full extension and scaled to equal radial length. Distal views not to scale.