Fig. 8From: ‘Arm brains’ (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomyProteroctopus ribeti Fischer & Riou, 1982, MNHN.F.R03801. A Photograph by P. Loubry, reproduced with permission, CR2P. B PPC-SRμCT (ESRF-ID, ID 19, voxel size 44,5 µm) slice of arm crown showing axial nerve (coronal view). C Cross section of the arm crown. Arrow is pointing to the axial nerve seen at the centre of the arm musculature seen in B and CBack to article page