Figure 2. Titanosaur osteoderms with small canals and dense spongy bone.

(a) HUE-02452 in deep view. Notice the fracture at the foramen level. (b) HUE-02452 in lateral view, with reconstructed missing portions (due to exposition to the elements, as it was collected ex-situ in surface) based on the morphological cline proposed by Vidal et al. 2014³. (c) Section of the smaller fragment of HUE-02452 (top) with interpretative drawing of the branching canal (below). (d) Section of the larger fragment of HUE-02452 (top) with interpretative drawing of the branching canal (below). Notice the branching toward the longitudinal canal, still filled with sediment. (e) UPUAM-13952 in deep (left), cross-section (middle) views and the 3D model (left) obtained from the CT-scan slices, with the longitudinal canal in red. (f–h) CT-scan slices at different positions of the osteoderm, in which the longitudinal canal can be seen. Scale for (a,b,e) = 100 mm. Scale for (c,d) = 50 mm. lc = longitudinal canal.