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. 2016 Sep 6;16(1):181. doi: 10.1186/s12862-016-0744-7

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© The Author(s). 2016

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. 1 — Part of the Amathia gracilis colony; photographs of live animals. a Zooid with a portion of the stolon. b Different parts of the zooid body: cystid, collar, and a tentacle sheath. c Anterior part of a zooid: lophophore, tentacle sheath, and collar. The rugosity of the collar is evident. Abbreviations: co - collar; cys - cystid; lph - lophophore; tsh - tentacle sheath; st - stolon; zd - zooid