Crystallographic texture of Late Triassic gastropod nacre: evidence of long-term stability of the mechanism controlling its formation

Bulletin of geosciences

Frýda J¹  Frýdová B¹  Bandel K¹ 

关键词: Gastropoda;    nacre;    crystallographic texture;    time stability;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

Ananalysisofthecrystallographictextureofnacre(mother-of-pearl)intheLateTriassicgastropodWortheniellacoralliophilaispresented.Theprimaryaimofthisstudywastotestthetimestabilityofthecrystallographictexturepatternofgastropodnacreoveranextremelylongtimespan.OurresultsshowthatthecrystallographicaxesofindividualaragoniteplateletsintheLateTriassicWortheniellacoralliophilahaveanidenticalarrangementtothoseinlivingvetigastropods.ThesamemicrostructureaswellasthecrystallographictextureofnacreinRecentandLateTriassicgastropodsimpliesthesamebiologicalmechanismsforitsformation.OurstudysuggeststhattheproteinscontrollingtheshapeandorientationofindividualnacreousplateletsinlivinggastropodshavenotchangedsincetheLateTriassic.Themolecularmechanismsdrivingtheoriginandthedevelopmentofgastropodnacrearethusextremelyoldandhaveremainedunchangedforatleast220millionyears.

【 授权许可】

Unknown