Fig. 7

Confocal laser scanning microscopy of female Osedax priapus. a Overview, ventral view (red, serotonin LIR; blue, acetylated α-tubulin IR). b Anterior part with palps bases, ventral view (red, serotonin LIR; blue, acetylated α-tubulin IR). c Middle part of trunk (blue, acetylated α-tubulin IR; yellow and almost white, dapi). d-h Series of anterior region from the ventralmost side in (d) to dorsalmost side in (h) (red, acetylated serotonin LIR; cyan, acetylated α-tubulin IR; scale bar is similar for these pictures). i Serotonin LIR in anterior region, ventral side. j, k The ventralmost and dorsalmost sides of the posterior trunk region and ovisac, respectively (red, serotonin LIR; cyan, acetylated α-tubulin IR). Abbreviations: ann – anterior nerve net, br – brain, cb – ciliary band, cnn – circular nerve net, cvc – commissure of the vc, dn – dorsal nerve, dln – dorso-lateral nerve bundle, dpnn – dorsal posterior nerve net, drpn1, 2 – dorsal right palp nerve 1, 2, mnb – neurites possibly innervating longitudinal muscles (for fast retraction), oln – ovisac longitudinal nerves, op – ovisac nerve net, os – ovisac, pcb – palp ciliary band, pnn - posterior nerve net, tr – trunk, vc – ventral cord, vcf – ventral ciliary field, vln – ventro-lateral nerve, vlpn1, 2 – ventral left palp nerve 1, 2, vrpn1 - ventral right palp nerve 1, vp – ventral plexus between vc