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. 2023 May 9;20:16. doi: 10.1186/s12983-023-00491-2

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© The Author(s) 2023

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. 3 — Microscopy images of the dens lock and the manubrial musculature in different taxa of Collembola. A–C SEM images of the dens lock (anterior view): A Podura aquatica Linnaeus, 1758 [26] B Dicyrtomina ornata (Nicolet, 1842) C Megalothorax minimus [50]. D–F cLSM images of the manubrial musculature on 555 nm: D Podura aquatica (posterior view); E Dicyrtomina ornata (lateral view); F Megalothorax minimus Willem, 1900 (lateral view). M: manubrium; D: dens; Dl: dens lock; L1: Lock 1; L2: Lock 2. Coloured structures, green: hooks L1 and L2; yellow: the furrows