Fig. 4From: ‘Arm brains’ (axial nerves) of Jurassic coleoids and the evolution of coleoid neuroanatomyBelemnotheutis antiquus Pearce, 1847; NHMUK 25966, Christian Malford, Wiltshire, England, Callovian Oxford Clay; entire animal with excellently preserved mantle and complete arm crown. Drawing after the holotype, refigured in Clements et al. (2017)Back to article page