Podrobnosti záznamu

Název
    Crystallographic texture of Late Triassic gastropod nacre: evidence of long-term stability of the mechanism controlling its formation
Autor
    Bandel, K.
    Frýda, Jiří
    Frýdová, Barbora
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Bulletin of Geosciences
Svazek/č.
    Roč. 84, č. 4
Strany
    10
Rok
    2009
Výraz tezauru
    Gastropoda, nacre, crystallographic texture, time stability
Klíčové slovo
    Controlling
    Crystallographic
    Evidence
    Formation
    Gastropod
    Late
    Long-term
    Mechanism
    Nacre
    Stability
    Texture
    Triassic
Abstrakt (anglicky)
   An analysis of the crystallographic texture of nacre (mother-of-pearl) in the Late Triassic gastropod Wortheniella coralliophila is presented. The primary aim of this study was to test the time stability of the crystallographic texture pattern of gastropod nacre over an extremely long time span. Our results show that the crystallographic axes of individual aragonite platelets in the Late Triassic Wortheniella coralliophila have an identical arrangement to those in living vetigastropods. The same microstructure as well as the crystallographic texture of nacre in Recent and Late Triassic gastropods implies the same biological mechanisms for its formation. Our study suggests that the proteins controlling the shape and orientation of individual nacreous platelets in living gastropods have not changed since the Late Triassic. The molecular mechanisms driving the origin and the development of gastropod nacre are thus extremely old and have remained unchanged for at least 220 million years.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014