Fig. 9 in Quadrupedal dinosaurs did not evolve fully pronated forearms: New evidence from the ulna

Fig. 9. Comparison of variation in the semi-pronated distal antebrachial epiphyses of select facultatively bipedal ornithischian dinosaurs and those with obligatory quadrupedalism. A–C. Sauropelta edwardsorum Ostrom, 1970. A. AMNH 3035. B. AMNH 3035, reversed. C. YPM 5338. D. Texasetes pleurohalio Coombs, 1995 (USNM 337987), radius reversed. E. Panoplosaurus sp. (YPM PU-21178 or 16970), reversed. F, G. Centrosaurus sp. F. Juvenile TMP 94.12.798). G. TMP P81.19.292. H–J, M. Triceratops sp. H. Large ceratopsid (AMNH 5857), reversed. I. AMNH 5880. J. USNM 6530. M. FMNH 12003, reversed. K, L. Triceratops horridusMarsh, 1889. K. USNM 4842, reversed. L. USNM 4842. N, P, Q, T, U. Stegosaurus sp. N. USNM 4929. P. YPM 1854, reversed. Q. YPM 4835. T. YPM uncataloged, field number 9C-14-7J, reversed. U. USNM 7754. O, R, S. Stegosaurus sulcatus Marsh, 1887. O. YPM 4836, reversed. R. USNM 4937, reversed. S. YPM 4836, reversed. V. Gilmoreosaurus mongoliensis (Gilmore, 1933) (AMNH 6551). W. Hypacrosaurus altispinus Brown, 1913 (AMNH 5357), reversed. X–AA. Hadrosaurs. X. TMP 1981.29.2, reversed. Y. TMP 1981.41.13.7. Z. TMP 1980.29.101, reversed. AA. TMP 2005.09.84. AB. Tenontosaurus sp. (AMNH 3043). AC. Camptosaurus sp. (YPM 6794). In this and the following two figures radii and ulnae only touch if they are complementary; all others are oriented across from other elements in the standardized pose. Scale bars 30 mm.