Figure 6 in Paleohistological studies of bone and teeth in Gyrodus circularis (Gyrodidae: Pycnodontiformes: Actinopterygii). Phylogenetic implications for the Gyrodidae

Figure 6. – Gyrodus circularis. Ground transversal sections (transmitted natural light). A: (MNHN-F-Histos 2748) A view of the contact between the tooth and the alveolar bone (ab). The alveolar spongy bone is constituted of relatively thin bony trabeculae that surround numerous vascular cavities. (od = orthodentine). B: (MNHN-F-Histos 2748) Detail showing the contact between the orthodentine (od) and the alveolar bone (ab). Some vascular cavities (arrowheads) and numerous osteocytes with their canalicles are seen. Scale bars: A = 250 μm; B = 100 μm.