20.500.12556/RUL-168995 That's how they roll skeletal mechanics of enrolment and the importance of hydrostatic support in terrestrial isopods Various arthropods can roll into a ball for protection. In terrestrial isopods (Oniscidea), this ability has likely evolved independently in different lineages. In this work, comparative imaging of extended and rolled isopods using micro-computed tomography of rapidly frozen individuals was coupled with live imaging. The results show that the points of rotation between consecutive body segments are positioned dorsolaterally and do not represent fixed joints, as previously assumed. Ridges at the anterior and posterior edges of consecutive dorsal plates (tergites) lean against each other at these points, allowing consecutive body segments to rotate relative to each other. Conglobating terrestrial isopods have shorter sternal plates than non-rollers. As a result, the sternal plates overlap only as an isopod rolls, forming furrows that accommodate the walking legs. The sternal plates are able to bend along a flexible suture at their midline, which is pulled inward during rolling. Both conglobating and non-conglobating terrestrial isopods are capable not only of ventral but also lateral flexion, which requires the separation of the surfaces that are in contact during rolling. The observed diversity of movements can be explained by the use of hydrostatic support provided by the hemocoel. The essential role of this hydrostatic support in the movement of isopods is demonstrated. arthropod exoskeleton morphology micro-CT biomechanics členonožci eksoskelet morfologija mikro-CT biomehanika true false true Angleški jezik Slovenski jezik Članek v reviji 2025-05-06 16:02:31 2025-05-06 16:02:32 2025-05-07 04:05:41 0000-00-00 00:00:00 2025 0 0 16 str. art. 101452 Vol. 87 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 502 1467-8039 10.1016/j.asd.2025.101452 234830851 1-s2.0-S1467803925000441-main.pdf 1-s2.0-S1467803925000441-main.pdf 1 337C095A6F13DAA7F5080831A26ED3C8 60f28500060008e416cea115eb947365c6d8c25af5394f1eb05c8d55e85a4c8a bf415649-2a81-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210096 https://www.sciencedirect.com/science/article/pii/S1467803925000441 0 b1195830-2a81-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210095 Biotehniška fakulteta 0 0 0