Exemplar profiles of the proximal (A-H) and distal (I-P) ends of sauropod left radii (anterior surfaces towards top): A, I, Ferganasaurus (PIN 3042/1 [101]): B, J, Apatosaurus excelsus (YPM 1980 [100]); C, K, Camarasaurus grandis (YPM 1901 [100]); D, L, Haestasaurus (NHMUK R1870); E, M, Giraffatitan (MfN MB.R 2181 [87]); F, N, Epachthosaurus (UNPSJB-PV 920, based on photographs by PDM); G, O, Diamantinasaurus (AAOD 603 [80]); H, P, Neuquensaurus (MLP-CS 1169 [90]; P based on a photograph provided y S. Poropat). B, E-H, J, and M-P are based on right radii that have been reversed in order to facilitate comparison. Abbreviations: pldc, posterolateral distal condyle; pmdc, posteromedial distal condyle; pmp, proximal medial process. Profiles not drawn to the same scale.