@misc{10481/93975,
year = {2024},
month = {6},
url = {https://hdl.handle.net/10481/93975},
abstract = {Caudofoveata are molluscs that protect their vermiform body with a scleritome, a mosaic of
unconnected blade/lanceolate-shaped aragonite sclerites. For the species Falcidens gutturosus and
Scutopus ventrolineatus we studied the crystallographic constitution and crystal orientation texture
of the sclerites and the scleritome with electron-backscatter-diffraction (EBSD), laser-confocalmicroscopy
(LCM) and field-emission electron microscopy (FE-SEM) imaging. Each sclerite is an
aragonite single crystal that is completely enveloped by an organic sheath. Adjacent sclerites overlap
laterally and vertically are, however, not connected to each other. Sclerites are thickened in their
central portion, relative to their periphery. Thickening increases also from sclerite tip towards its
base. Accordingly, cross-sections through a sclerite are straight at its tip, curved and bent towards
the sclerite base. Irrespective of curved sclerite morphologies, the aragonite lattice within the sclerite
is coherent. Sclerite aragonite is not twinned. For each sclerite the crystallographic c-axis is parallel
to the morphological long axis of the sclerite, the a-axis is perpendicular to its width and the b-axis is
within the width of the sclerite. The single-crystalinity of the sclerites and their mode of organization
in the scleritome is outstanding. Sclerite and aragonite arrangement in the scleritome is not given
by a specific crystal growth mode, it is inherent to the secreting cells. We discuss that morphological
characteristics of the sclerites and crystallographic preferred orientation (texture) of sclerite aragonite
is not the result of competitive growth selection. It is generated by the templating effect of the
organic substance of the secreting cells and associated extracellular biopolymers.},
organization = {Open Access funding enabled and organized by Projekt DEAL},
organization = {Project PID2020116660GB-I00 of the Spanish Ministerio de Ciencia e Innovación (MCIN/AEI/https://doi.org/10.13039/501100011033/)},
organization = {Project PCM 00092 (Junta de Andalucía)},
organization = {Research
Group RNM363 (Consejerı́a de Economı́a, Innovación, Ciencia y Empleo, Junta de Andalucı́a)},
organization = {Unidad
Científica de Excelencia UCE-PP2016-05 (University of Granada)},
organization = {Grant PCIN-2017–098 (Junta de Andalucía)},
organization = {Pre-doctoral FPU grant (Ministry of Science,
Innovation and Universities)},
organization = {German Research Council Programmes
GR 9/1234, SCHM 930/11-2},
publisher = {Springer Nature},
title = {Molluscs generate preferred crystallographic orientation of biominerals by organic templates, the texture and microstructure of Caudofoveata (Aplacophora) shells},
doi = {10.1038/s41598-024-63042-7},
author = {Yin, X and Castro Claros, Juan Diego and Griesshaber, Erika and Salas, Carmen and Sancho Vaquer, A. and Checa González, Antonio G. and Schmahl, Wolfgang W.},
}