Prism substructures in the shell of Pinna nobilis (Linnaeus, 1758), Mollusca – Evidence for a three-dimensional pulsed-growth model

Heliyon

Oulfa Belhadj¹  Stephan Borensztajn²  Sergio Trigos-Santos³  Yannicke Dauphin⁴  Patricia Prado⁵  Marc Gèze⁶  Jean-Pierre Cuif⁷ 

[1] Corresponding author.;CRC Ministère de la Culture et de la Communication, Muséum National d’Histoire Naturelle USR 3224, Sorbonne Université, CNRS CP21, Paris, France;CeMIM, Muséum National d’Histoire Naturelle de Paris, 43 Rue Cuvier, 75005 Paris, France;IRTA San Carles de la Ràpita, 43540 Tarragona, Spain;Institut océanographique Paul Ricard, Ile des Embiez, 83140, Six-Fours les Plages, France;UMR 7154 Institut de Physique du Globe de Paris, 1 Rue Jussieu, 75005 Paris, France;UMR 7207 CR2P, Muséum National d’Histoire Naturelle, 8 Rue Buffon, 75005 Paris, France;

关键词: Pinna;    Mollusca;    Prisms;    Stepping growth;    Biomineralization;    Animal physiology;   

DOI  :  

来源: DOAJ

【 摘 要 】

In the shells of the Pelecypods belonging to the Pinnidae family, the calcareous prismatic units of the outer layer are long-standing references for biomineralization studies. To elucidate how the mechanism of prism formation enables both shell elongation and thickness increase, a top-down structural analysis of these classical “simple prisms” has been carried out, taking advantage of shell sampling on actively mineralizing animals. Particular attention was paid to the morphological and structural patterns of the calcareous units sequentially produced at the margins of the growth lamellae. This pre-prismatic part of the shell allows for studying the mineralizing stages not taken into account in prism reconstructions based on samples taken from older areas of the shell. Examination of the microstructural sequence shows that within the actively mineralizing area of the shell, a step-by-step structuring process is continuously running, providing a renewed view of prism formation as it makes obvious the progressive occurrence of their specific patterns. Given the critically endangered status of the species, a better knowledge of the mineralization process associated to shell growth may become handy for future studies aimed at understanding the health status of individuals based on their shell records.

【 授权许可】

Unknown