Fig. 4

Ulna and metacarpal IV from the Last Day locality, Sierra del Portezuelo area, Neuquén Province, Argentina. Right ulna (MCF-PVPH 917/4) in proximal (A) and posterolateral (B) views; C-H, right metacarpal IV in proximal (C), lateral (D), anterior (E), medial (F), distal (G), and posterior (H) views. Abbreviations lp, lateral process; mp, medial process; ol, olecranon process; rf, radial fossa. Dashed line for the reconstructed parts. Scale bars of 10 cm