Record details

    Mode of life of some Silurian and Devonian platyceratids
Statement of responsibility
    Radvan J. Horný
    Horný, Radvan J.
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 75, no. 2
    p. 135-143
    12 fot.
    České resumé
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    morfologie funkční
    prostředí marinní
Geographical name
    Bubovice (Beroun)
    Karlštejn (Beroun)
    Koněprusy (Beroun)
    Králův Dvůr (Beroun)
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
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    5. 4. 2007
Import date
    8. 8. 2012