FIG. 8. — Machaeracanthus goujeti n in Machaeracanthus goujeti n. sp. (Acanthodii) from the Lower Devonian of Spain and northwest France, with special reference to spine histology

FIG. 8. — Machaeracanthus goujeti n. sp.; Lower Devonian, Iberian Chain. Transverse section proximal part of spine MPZ 2009/27. A, general view of wing; B, detail of the wing (see framed area in A) showing trabecular dentine with taphonomic alteration; C, detail of B exhibiting the dentinal tubules. Thin section observed in transmitted ordinary light. Abbreviations: see Material and methods. Scale bars: A, 0.5 mm; B, 0.1 mm; C, 50 μm.