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. 2019 Jan 3;20:4. doi: 10.1186/s12859-018-2474-x

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© The Author(s) 2019

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. 7 — Distribution of images over taxa. a Number of images per species and content. The dashed red line displays the total number of images and the horizontal dotted line the median, amounting to 84 images. b and c display the number of species per genus and family. Please note that only 100 genera and 66 families represented at least by three species are displayed for sake of visibility