Validation of co-registration by volume rendering and ortho slices. LM serial section (registration adjusted) and microCT data (original registration retained) sets displayed by volume rendering (A, B) and slices (C) in AMIRA® A. View from posterior, left side (greenish) LM serial section data, right side (brownish) microCT data, both datasets visualized with the volren module and opposite side clipped. B. View from the left side. Datasets like in A but in full, transparency intensified by lowering alphascale values. Note deviation of foot tips. C. View from posterior, left side orthoslice of LM serial section data, right side obliqueslice of microCT data aligned with LM orthoslice. bo, border between orthoslices; em, external plus pallial cavity epithelium; f, foot; g, gill; i, intestine; me, mantle edge; mu, muscle; ol, oral lappets; os, organic shell layers; ph, periostracal hairs; po, periostracum and periostracal structures.