Podrobnosti záznamu

Název
    Colour pattern polymorphism in Silurian nautiloid Phragmoceras Broderip, 1839
Autor
    Manda, Štěpán
    Turek, Vojtěch
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Bulletin of Geosciences
Svazek/č.
    Roč. 86, č. 1
Strany
    15
Rok
    2011
Výraz tezauru
    Cephalopoda, Nautiloidea, Phragmoceras, colour pattern, polymorphism, Silurian.
Klíčové slovo
    1839
    Broderip
    Colour
    Nautiloid
    Pattern
    Phragmoceras
    Polymorphism
    Silurian
Abstrakt (anglicky)
   Flamboyant colour pattern polymorphism documented in Silurian nautiloid Phragmoceras has not been observed in any other nautiloid genus. Two specimens of P. imbricatum display different shell coloration: narrow, densely spaced longitudinal bands subparallel to the shell axis, combined with narrower transversal bands versus transverse bands running laterally obliquely to growth lamellae. Two additional types of colouration have been observed in several specimens of Phragmoceras from Gotland. If pigmentation pattern served as a form of crypsis, then the quite different types of coloration in Phragmoceras indicate different solutions of this problem. Changes in colour pattern most probably correspond with depth inhabited; nautiloids that occupied shallow water environments display rather light coloured shells in comparison with forms inhabiting a deeper water setting.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014