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Fig. 6 | BMC Zoology

Fig. 6

From: Nerves innervating copulatory organs show common FMRFamide, FVRIamide, MIP and serotonin immunoreactivity patterns across Dinophilidae (Annelida) indicating their conserved role in copulatory behaviour

Fig. 6

Nervous system of adult males and their copulatory organs in Trilobodrilus axi (a-d) and Dinophilus vorticoides (e-g), as shown from immunoreactivity against acetylated α-tubulin. Maximum intensity projections of CLSM-images. a) Ventral overview of the nervous system of T. axi (3D crop of ventral part of z-stack), b-d) nervous system around copulatory organ, showing the ventral penial commissure (b, c), and the dorsal penial commissure (d). e) Ventral overview of the nervous system of D. vorticoides (3D crop of ventral part of z-stack), f) close up showing the commissure of the sixth body segment (potentially fused with the vpc?) (ventral view, 3D crop of ventral part of z-stack), g) innervation of the copulatory organ (ventral view, ventro-median part of z-stack). Abbreviations: cb – ciliary band, cec – circumoesophageal connective, co – copulatory organ (penis), com1–6 – commissures of the body segments 1–6, dpc – dorsal penial commissure, gd – gland ducts, gdo – gland duct openings, go – gonopore, mvn – medioventral nerve, nep – nephridium, np – brain neuropil, pco – penis cone opening, pmn – paramedian nerve, spd – spermioduct, sto – stomach, tcom – terminal commissure, vlnc – ventrolateral nerve cord

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