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. 2020 Jun 1;20:62. doi: 10.1186/s12862-020-01625-4

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 2 — The fuxianhuiid Xiaocaris luoi nov. from the Ercaicun section of Haikou, Cambrian (Stage 3) Chengjiang biota. a Holotype (He-f-6-5-63), part of complete specimen preserved in dorsal–ventral aspect and photographed under cross-polarized light. b Magnification of an exopod underneath the fifth trunk tergite of He-f-6-5-63 showing marginal setae, photographed under fluorescent light. c Magnification of an exopod underneath the seventh trunk tergite of He-f-6-5-63 showing marginal setae, photographed with fluorescent light. d Holotype (He-f-6-5-64), counterpart photographed under cross-polarized light