Fig. 9

The central nervous system and midgut in the trunk of Achelia echinata (Ammotheidae). Reconstructions of the CNS (3D volume rendering, green) and midgut (3D surface, magenta) based on a µCT scan of an adult male. The white arrowheads point to the origin of the posteriorly projecting proctodeal nerve. Asterisks indicate the incompletely reconstructed optic nerve (insufficient resolution and tissue damage). For better pattern visualization, all major nerves of the right body half were virtually removed in A (right side) and C. A Oblique antero-lateral view. Left bottom corner: overview of the specimen. Top: complete CNS and midgut reconstruction. Right bottom corner: CNS and eyes. B Ventral view. Left side: CNS in grayscale. Right side: CNS and midgut. For reference, unreconstructed dorsal parts of the trunk are shown in transparent gray. C Lateral view of the CNS with and without the midgut structures (left and right, respectively). For reference, unreconstructed parts of the right body half are shown in transparent gray