Fig. 9 in Givetian (Middle Devonian) sharks from Cairo, New York (USA): Evidence of early cosmopolitanism

Fig. 9. Incomplete fin spine with compound chondrichthyan scales that are comparable to Type 1 sensu Liao et al. (2007) from the Givetian of the Aragonian Pyrenees, Spain, NYSM 17790. A. Specimen whitened with ammonium chloride. B. Close-up view of associated spine, associated to compound chondrichthyan scales Type 1 sensu Liao et al. (2007). C. Transversal section extracted from a reconstruction of the specimen from micro CT scan data (exposure time: 1650 ms; accelerating voltage: 65kV; current: 120 μA), showing the internal canals. D. Sections extracted from the reconstruction of the fin spine tip from micro-tomodensitometry data; lateral (D1) and dorsal (D2) views, showing the system of internal canals. E. 3D reconstructions of the fin spine tip from micro CT scan data (exposure time: 1650 ms; accelerating voltage: 65kV; current: 120 μA), in lateral (E1) and dorso-lateral (E2) views.