FIG. 4 in Model-based analysis of postcranial osteology of marsupials from the Palaeocene of Itaboraí (Brazil) and the phylogenetics and biogeography of Metatheria

FIG. 4. — Juvenile to adult ontogenetic series, from left to right, of five left proximal ulnae of Didelphis virginiana; A, anterior view; B, medial view; C, lateral view. Abbreviations: HuUlm, medial humeroulnar; HuUlr, radial humeroulnar; HuUlz, zonal humeroradial; RaUlp, proximal radioulnar facet; rn, radial notch; ulalfo, ulnar annular ligamentous fossa; ulco, ulnar coronoid process; ulcolr, ulnar cranial olecranon ridge; uldtc, distal ulnar trochlear crest; ulfoa, ulnar fossa for anconeus; ulfofdp, ulnar fossa for flexor digitorum profundus; ulgr, ulnar guiding ridge; ulol, ulnar olecranon process; ulppr, ulnar proximal process; ulptc, ulnar proximal trochlear crest; ulptcl, ulnar lateral proximal trochlear crest; ulptcm, ulnar medial proximal trochlear crest; ulscs, ulnar subcutaneous surface; ultrn, ulnar trochlear notch. Scale bar: 4 mm.