Fig. 5

The central nervous system and midgut in the trunk of Ascorhynchus ramipes (Ascorhynchidae). 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. The white arrows indicate a small lateral midgut protrusion near the subesophageal ganglion. For better pattern visualization, all major nerves of the right body half were virtually removed in A (right side) and B. A Oblique antero-lateral view. Right top corner: overview of the complete specimen bearing egg packages on the ovigers. Left side: complete CNS and midgut reconstruction. Right bottom corner: anterior portion of the CNS and eyes. B Lateral view of the CNS with and without the midgut structures (top and bottom, respectively). For reference, unreconstructed parts of the right body half are shown in transparent gray. C Ventral view. Left side: CNS in grayscale. The black arrowheads point to the intersegmental nerves. Right side: CNS and midgut. For reference, unreconstructed dorsal parts of the trunk are shown in transparent gray