Fig. 3

Comparative 3D tomographic reconstructions of the internal anatomy. a. Chrysomallon squamiferum (redrawn from [35]). b. Gigantopelta chessoia. Colour groups correspond to specific anatomical systems: grey/black, digestive tract; brown, oesophageal gland; translucent blue, ctenidium; red, heart; yellow, gonad; green, nephridium; fuchsia/blue, nervous and sensory systems. Abbreviations: a, auricle; cg, cerebral ganglia; ct, ctenidium; dg, digestive gland; g, gonad; ls, non-ganglionic lateral swelling [35], ne, nephridium; oe, oesophagus; og, oesophageal gland; pg, pedal ganglia; ps, non-ganglionic pedal swelling [35]; r, radula; rc, radula cartilage; re, rectum; ss, statocysts; v, ventricle