Record details

Title
    Mode of life of some Silurian and Devonian platyceratids
Statement of responsibility
    Radvan J. Horný
Author
    Horný, Radvan J.
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 75, no. 2
Pages
    p. 135-143
Year
    2000
Notes
    12 fot.
    České resumé
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    Barrandien
    devon
    Gastropoda
    morfologie funkční
    prostředí marinní
    silur
Geographical name
    Beroun
    Bubovice (Beroun)
    ČR-Čechy
    Karlštejn (Beroun)
    Koněprusy (Beroun)
    Králův Dvůr (Beroun)
    Praha-Podolí
Keyword
    Devonian
    Life
    Mode
    Platyceratids
    Silurian
Abstract (in english)
   The Silurian and Devonian platyceratid gastropods, by Knight et al. 1960 classified as subgenera Platyceras (Platyceras) and Platyceras (Orthonychia) were adapted not only to a stationary life on crinoid calices, but demonstrably lived also on various firm objects lying at the sediment surface. According to the morphology of aperture, these platyceratid gastropods were not selective in choosing their "host", some of them belonged to the community using empty shells of orthoconic nautiloids lying on the sediment surface, others probably inhabited fragments of crinoids, shells of brachiopods etc. or perhaps even lithified parts of bioclastic sediment. These small platyceratids, of course, were not coprophagus but probably either deposits or filter feeders. Unique finds demonstrate a shell with the aperture partly embracing an orthocone or showing its morphology reflected by the gastropod growth structures.
   The stationary mode of life influenced the withdrawal function and location of the main retrator, the attachment area of which was shifted adaperturally and dorsally to the shell centre of gravity. The research has been carried out on the material from the Barrandian area, Bohemia
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    5. 4. 2007
Import date
    8. 8. 2012