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. 2019 Nov 21;12:553. doi: 10.1186/s13071-019-3809-9

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© The Author(s) 2019

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. 4 — Comparative SEM of NFM, TFM and PRM. a Two pairs of setae on the sternal plate of NFM (arrows) whereas TFM have three pairs of setae on the sternal plate (not shown). b Female PRM with a keystone-shaped anal plate. c The anal plate is distinct, with female NFM being tear-drop shaped with three anal setae (arrows). d Female NFM has elongated chelicerae with well-developed and distinct, fixed and movable digit, whereas adult female PRM have a smooth “whip-like” celicerae (not shown). Scale-bars: a, c, d, 50 μm; b, 500 μm. Abbreviations: ch, chelicera; fd, fixed digit; md, movable digit; Pa, pedipalp; ao, anal opening; as, anal shield; st, sternal plate; (LI–IV), leg; gs, genitoventral shield