Fig. 24 in Osteology and histology of a PlateoSaUrUS troSSingenSiS (Dinosauria: Sauropodomorpha) from the Upper Triassic of Switzerland with an advanced chronic pathology

Fig. 24 Histology of dorsal rib 10 of Plateosaurus trossingensis NMZ 1000001. Images in A and C taken under normal polarized light, B and D–F under cross-polarized light. A, B Whole cross-section of the proximal portion of the rib. White squares denote close-ups shown in C–F. C–F Primary cortex of the rib consisting of woven-parallel-complex, vascularized by numerous primary osteons. Note that the orientation of the longitudinal primary osteons in the woven-parallel matrix changes locally from dominantly radial arrangement in the deeper cortex (E), to circumferential or weakly reticular (C, D, F). The medullary cavity and larger erosion cavities in the perimedullary region are delimited by endosteal lamellar bone. Growth marks in the form of lines of arrested growth (depicted by arrows in C) are seen throughout the cortex. Growth zones become increasingly thinner towards the external bone surface and an external fundamental system is developed in the most surficial part of the cortex. ant anterior, EFS external fundamental system, Hb Haversian bone, LAG line of arrested growth, lat lateral, lb lamellar bone, med medial, mc medullary cavity, po, primary osteon, rc resorption cavity, ShF Sharpey's fibres, wpc woven-parallel complex. Scale bars 1 mm (A–E) and 0.5 mm (F) ; Published as part of Dupuis, Sina F. J., Bestwick, Jordan, Hansen, Dennis M., Horn, Esben, Wiik, Stacey, Frederiksen, Rasmus, Zboray, Robert, Tajbakhsh, Kiarash, Bachmann, Ursina, Pabst, Ben & Scheyer, Torsten M., 2025, Osteology and histology of a PlateoSaUrUS troSSingenSiS (Dinosauria: Sauropodomorpha) from the Upper Triassic of Switzerland with an advanced chronic pathology, pp. 1-39 in Swiss Journal of Palaeontology (27) 144 (1) on page 32, DOI:10.1186/s13358-025-00368-3, http://zenodo.org/record/16972108