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. 2023 Sep 7;13:14743. doi: 10.1038/s41598-023-39158-7

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© The Author(s) 2023

Open Access This 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/.

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Volume rendering of the holotype specimen of Palaeoiresina cassolai Wiesner et al., 2017 (A, B, D) and Horn’s tiger beetle fossil (C). (A) anterior part of beetle body, dorsal view, with (A’), enlarged section of part of the elytra, showing puncture. (B, C) mandibles, dorsal view. (D) ventral surface of labrum. Abbreviations: ant, antenna; bfb, basal face brush of mandible; ce, compound eye; eph, epipharynx, dorsal surface; hu, humerus; it, incisor tooth; la-as, -ls, apical resp. lateral setae of labrum; pn, pronotum; ppr, parapedial ridge; pps, parapedial setae; rt, retinacular tooth; rt1, 2, 3, retinacular tooth, cusp 1, 2, 3; sc, scutellum (highlighted by dotted line); su, elytral suture; tta, ttb, anterior resp. basal terebral tooth; vm, ventral microtrichia of mandible. The interactive PDF of the microCT reconstruction of the forebody of the holotype specimen of P. cassolai as an embedded 3D image is available at Supplementary figure 3.