Record details

    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
Publication type
    článek v periodiku
Source title - serial
    Acta Geologica Polonica
    Roč. 60, č. 3
Thesaurus term
    Czech Republic.
    Nautilid jaws
    upper Cretaceous
Abstract (in english)
   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
Contributor code
    UK, PřF
Source format
Import date
    8. 8. 2012