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. 2019 Aug 28;19:173. doi: 10.1186/s12862-019-1498-9

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 6 — Magelona mirabilis, immunohistochemistry: a-d lateral view; e: ventral view. a: Tubulin-lir. A minor dorsal nerve (dn) arises in the posterior part of the brain (br). The tip of the head is innervated by cephalic nerves (cn) which originate in the brain (br). A lateral chain of neuropil concentrations (arrows) is connected to the brain. The concentrations correspond with the location of the lateral organ (lo). ca: caudal; fr: frontal; mo: mouth opening; S2: enlarged neurons. b: Tubulin-lir. In dorsal part of the brain (br) a cluster of enlarged neurons (S2) is present. The ventral part of the brain is confluent with the lateral medullary cords (lc). ca: caudal; fr: frontal; mo: mouth opening. c: FMRF-lir. Higher magnification of the lateral chain of neuropil concentrations in A. An accumulation of FMRF-positive neurites (arrow) is present at the heights of the lateral organ. The concentrations are interconnected by a nerve (ner). d: Tubulin-lir. Higher magnification of the lateral chain of neuropil knots in A. The ventro- lateral cords (lc) are connected to the chain of neuropil concentrations (arrows) by fine neurites (ne). e: Tubulin-lir, FMRF-lir, ventral view. The accumulations of neurites (arrow) are located close to the parapodia (pa) and correspond with the location of the lateral organ (lo). ca: caudal; fo: frontal