Fig. 6
From: The innervation of the male copulatory organ of spiders (Araneae) – a comparative analysis
Palpal organ of Stegodyphus dumicola; external morphology (a), histology (b), ultrastructue as documented by TEM (d), and 3D reconstruction of the spermophor (green) and nervous tissue (yellow) as based on segmentation of histological image stacks (c). Arrow in (a) indicates the plane chosen for semi-thin cross section and arrowhead in (c) marks terminals of the bulb nerve. Box in (b) shows central position of bulb nerve in the palpal organ, surrounded by neuronal somata, ultrastructural details of boxed area are illustrated in (d). Abbreviations: B Bulbus, Cy Cymbium, E Embolus, GE Glandular epithelium, Gli Glial cell processes, HS Haemolymph space, Htd Haematodocha, HV Haemolymph Vessel, Mt Mitochondria, Ne Neurites, NeB Neurite Bundle, N Nucleus of a neuron, S Spermophor, SC Cluster of neuronal somata