Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells
The movement of valves of bivalved invertebrates is enabled through the action of muscles and the interplay between the muscles and the hinge ligament. The muscles that move the valves attach to their internal surface. To promote the structural integrity at the mechanically mismatched interfaces, a...
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2025-07-01
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| author | Sebastian Hoerl Erika Griesshaber Daniel Weller Shahrouz Amini Verena Häussermann Maria A. Bitner Klaus Achterhold Franz Pfeiffer Wolfgang W. Schmahl |
| author_facet | Sebastian Hoerl Erika Griesshaber Daniel Weller Shahrouz Amini Verena Häussermann Maria A. Bitner Klaus Achterhold Franz Pfeiffer Wolfgang W. Schmahl |
| author_sort | Sebastian Hoerl |
| collection | DOAJ |
| description | The movement of valves of bivalved invertebrates is enabled through the action of muscles and the interplay between the muscles and the hinge ligament. The muscles that move the valves attach to their internal surface. To promote the structural integrity at the mechanically mismatched interfaces, a specific crystal microstructure and texture are present at the muscle attachment sites. These are different from the crystal microstructure and texture of the rest of the valves. We present here for modern two- and three-layered brachiopod shells (<i>Magellania venosa</i>, <i>Liothyrella neozelanica</i> and <i>Gryphus vitreus</i>) the mode of crystal organisation at sites of adductor and diductor muscle attachments (i) relative to the microstructure and texture that forms the other sections of the valves and (ii) relative to crystal organisation of muscle attachment sites of bivalved invertebrates of other phyla, namely, species of the class Bivalvia. We discuss similarities/differences in Ca-carbonate phase, microstructure and texture between rhynchonellate brachiopods and bivalves, and discuss whether the Ca-carbonate crystal organisation of muscle attachment sites is convergent for bivalved marine organisms. We show significant differences in muscle attachment site architecture and highlight the different structural solutions developed by nature for shells of marine organisms that serve the same purpose. |
| format | Article |
| id | doaj-art-8f6a2b95dad449d5a1033a436d659dca |
| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-07-01 |
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| series | Crystals |
| spelling | doaj-art-8f6a2b95dad449d5a1033a436d659dca2025-08-20T03:58:26ZengMDPI AGCrystals2073-43522025-07-0115764910.3390/cryst15070649Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc ShellsSebastian Hoerl0Erika Griesshaber1Daniel Weller2Shahrouz Amini3Verena Häussermann4Maria A. Bitner5Klaus Achterhold6Franz Pfeiffer7Wolfgang W. Schmahl8Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, 80333 Munich, GermanyDepartment of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, 80333 Munich, GermanyDepartment of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, 80333 Munich, GermanyDepartment of Biomaterials, Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, GermanyEscuela de Ciencias del Mar, Facultad de Recursos Naturales, Pontifica Universidad Católica de Valparaíso, Valparaíso 330, ChileInstitute of Paleobiology, Polish Academy of Sciences, 00-818 Warsaw, PolandDepartment of Physics, TUM School of Natural Sciences, Technische Universität München, 85748 Garching, GermanyDepartment of Physics, TUM School of Natural Sciences, Technische Universität München, 85748 Garching, GermanyDepartment of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, 80333 Munich, GermanyThe movement of valves of bivalved invertebrates is enabled through the action of muscles and the interplay between the muscles and the hinge ligament. The muscles that move the valves attach to their internal surface. To promote the structural integrity at the mechanically mismatched interfaces, a specific crystal microstructure and texture are present at the muscle attachment sites. These are different from the crystal microstructure and texture of the rest of the valves. We present here for modern two- and three-layered brachiopod shells (<i>Magellania venosa</i>, <i>Liothyrella neozelanica</i> and <i>Gryphus vitreus</i>) the mode of crystal organisation at sites of adductor and diductor muscle attachments (i) relative to the microstructure and texture that forms the other sections of the valves and (ii) relative to crystal organisation of muscle attachment sites of bivalved invertebrates of other phyla, namely, species of the class Bivalvia. We discuss similarities/differences in Ca-carbonate phase, microstructure and texture between rhynchonellate brachiopods and bivalves, and discuss whether the Ca-carbonate crystal organisation of muscle attachment sites is convergent for bivalved marine organisms. We show significant differences in muscle attachment site architecture and highlight the different structural solutions developed by nature for shells of marine organisms that serve the same purpose.https://www.mdpi.com/2073-4352/15/7/649brachiopodsEBSDbiomineralsmicrostructure/texturemuscle attachmentlayered bioceramics |
| spellingShingle | Sebastian Hoerl Erika Griesshaber Daniel Weller Shahrouz Amini Verena Häussermann Maria A. Bitner Klaus Achterhold Franz Pfeiffer Wolfgang W. Schmahl Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells Crystals brachiopods EBSD biominerals microstructure/texture muscle attachment layered bioceramics |
| title | Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells |
| title_full | Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells |
| title_fullStr | Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells |
| title_full_unstemmed | Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells |
| title_short | Crystal Organisation of Muscle Attachment Sites of Bivalved Marine Organisms: A Juxtaposition Between Brachiopod and Bivalved Mollusc Shells |
| title_sort | crystal organisation of muscle attachment sites of bivalved marine organisms a juxtaposition between brachiopod and bivalved mollusc shells |
| topic | brachiopods EBSD biominerals microstructure/texture muscle attachment layered bioceramics |
| url | https://www.mdpi.com/2073-4352/15/7/649 |
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