Fig. 8

Alignment of genitalia during copulation (volume rendering of fixed couples, false colour). Male structures in blue tones, female structures in red tones. a Volume rendering of micro-CT scans of a whole sample (20 min after the onset of copulation) with reconstructed genitalia and some posterior abdominal segments. b Transparent view of genitalia (20 min). c Parasagittal section of a couple at 80 min after the onset of copulation, note the tight contact of the anal cone and socii with the median lobes of anal papillae and sterigma and relatively long distance between the juxta and S7. d Attachment during copulation. The cuculli of the valvae invaginate the pleurae of segment 7. e Deformation of sterigma caused by flexion of the valvae (20 min, postero-anterior view of the female). Scale bar 1 mm