Figure 7 in Paleohistological studies of bone and teeth in Gyrodus circularis (Gyrodidae: Pycnodontiformes: Actinopterygii). Phylogenetic implications for the Gyrodidae

Figure 7. – Gyrodus circularis. (MNHN. JRE 540). Ground transversal sections (transmitted natural light). A: (MNHN-F-Histos 2748) Detail of alveolar bone showing numerous osteocytes with there ramified osteocytic canalicles. B: (MNHN-F-Histos 2743) Detail of the prearticular bony tissue with some vascular cavities and/or canals (vc). The white arrowheads point to osteoblastic canalicles. C: (MNHNF-Histos 2743) Detail of the contact dentine/bony tissue (de/bo). Bony tissue is crossed by some osteoblastic canalicles whose apical end is ramified (arrowheads). The arrows point to a cementing line between bone and dentine. D: (MNHN-F-Histos 2746) Detail of some osteoblastic canalicles (arrows) starting from vascular canals (vc) in the alveolar bone and of some star-shaped osteocytes (arrowheads). The end of the right osteoblastic canalicle is clearly ramified. Scale bars: A = 25 μm; B = 100 μm; C = 25 μm); D = 25 μm.