Figure 2. – Lepidonotothen squamifrons. A in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)

Figure 2. – Lepidonotothen squamifrons. A: Cross section of the premaxilla (microradiography). B: Cross section of the dental (microradiography). C: Cross section of a dorsal spiny ray (microradiography). D: Cross section of a caudal vertebra (microradiography) showing the numerous vertebral bony arches fixed on the centrum. E: Detail of a section of a caudal vertebra (Polarized light showing the fibrous organization of bone and two vascular canals (arrowheads). F: Same section than Fig. E observed in transmitted natural light. The vascular canals are surround- ed by a reversal line (arrows). G: Detail of a section (polarized light) in a vertebral centrum showing growth marks. Scale bars: A = 500 μm; B = 250 μm; C, D, E, F = 200 μm; G = 50 μm. A: 415 mm TL; B-D, G: 333 mm TL; E, F: 250 mm TL.