Record details

Title
    Late Cretaceous nautilid beaks from near-shore/shallow water deposits of the Bohemian Cretaceous Basin (Czech Republic)
Author
    Frank, Jiří
    Košťák, Martin
    Marek, Jaroslav
    Mazuch, Martin
    Vodrážka, Radek
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Acta Geologica Polonica
Vol./nr.
    Roč. 60, č. 3
Pages
    15
Year
    2010
Thesaurus term
    Cephalopoda
    Conchorhynchus
    Czech Republic.
    Nautilid jaws
    Nautilorhynchus
    Rhyncholites
    upper Cretaceous
Keyword
    Basin
    Beaks
    Bohemian
    Cretaceous
    Czech
    Deposits
    Late
    Nautilid
    Near-shore/shallow
    Republic
    Water
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.
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    8. 8. 2012