Podrobnosti záznamu

    Late Cretaceous nautilid beaks from near-shore/shallow water deposits of the Bohemian Cretaceous Basin (Czech Republic)
    Frank, Jiří
    Košťák, Martin
    Marek, Jaroslav
    Mazuch, Martin
    Vodrážka, Radek
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Acta Geologica Polonica
    Roč. 60, č. 3
Výraz tezauru
    Czech Republic.
    Nautilid jaws
    upper Cretaceous
Klíčové slovo
Abstrakt (anglicky)
   More than 30 isolated nautilid jaws have been discovered in washed samples of late Cretaceous (turonian) near shore/shallow water deposits located in the southern part of the Bohemian Cretaceous Basin (BCB). Upper and lower jaws discovered in genetically-similar early turonian deposits are described in detail herein. The nautilid jaw apparatuses comprise rhyncholites (upper jaws) assigned to Nautilorhynchus simplex (Fritsch), and conchorhynchs (lower jaws) assigned to Conchorhynchus cretaceus Fritsch. Some rhyncholites show signs of abrasion and corrosion, and may also form a substrate for sessile organisms. In one specimen, signs of acid digestion in the stomach of a predator were recognized. N. simplex is synonymized with "Rhyncholithus" bohemicus (till), "R." curvatus" (till), "R". rectus (till) and "R". curtus (till). The significant morphological variability observed in N. simplex is supported by biometric data.
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
Datum importu
    8. 8. 2012