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. 2015 Sep 1;15:169. doi: 10.1186/s12862-015-0443-9

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© Lamsdell et al. 2015

Open Access This 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 — Pentecopterus decorahensis, prosomal ventral plate. a SUI 139914, posterior lobe of lateral portion of ventral plate. b SUI 139978, lateral portion of ventral plate showing carapace locking mechanism (arrowed). c SUI 139936, anterior portion of ventral plate including rostrum, retained on shale. d SUI 139936, posterior portion of ventral plate shown in Fig. 1c including linguoid projection, removed from sediment. e SUI 1139921, linguoid projection. f SUI 139917 part, ventral plate. g SUI 139917 counterpart, lateral portion of ventral plate. h SUI 139916, lateral portion of large ventral plate. Scale bars = 10 mm