Fig. 1From: ‘Arm brains’ (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomySueviteuthis zellensis Reitner & Engeser, 1982, GPIT Ce 1564/2,6/PV-67025, Toarcian, Fischer quarry, Zell, east of Ohmden. a UV-photo by R. Roth; b photo under white light (insert with magnification of the arm bases); c drawing after aBack to article page