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. 2014 Aug 22;14:159. doi: 10.1186/s12862-014-0159-2

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Copyright © 2014 Haug et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Silurian thylacocephalanThylacares brandonensisUWGM 1749. A. Overview. B. Close up of eyes. C. Close up of supposed muscle tissue (arrows) in the trunk region. D. Close up of raptorial appendages 2 and 3. E. Color-marked version of D, indicating individual elements of the appendages. Abbreviations: ce = compound eye; e = element; ra = raptorial appendage; sa = stalk; so = shield outline; ts = trunk segments.