Record details

Title
    Gradual opening of the siphonal tube in an orthoconic cephalopod from the Silurian of Central Bohemia (Czech Republic)
Statement of responsibility
    Ivan Kolebaba
Other titles
    Postupné otvírání sifonální trubice u ortokonního hlavonožce ze siluru středních Čech
Author
    Kolebaba, Ivan
Language
    anglicky
Source title - serial
    Journal of the Czech Geological Society
Vol./nr.
    Vol. 44, no. 1-2
Pages
    p. 131-136
Year
    1999
Notes
    2 obr., 2 pl., 11 bibl.
    České resumé
    Zkr. název ser.: J. Czech geol. Soc.
Subject group
    anatomie
    Barrandien
    Caphalopoda
    Mollusca
    morfologie funkční
    nový taxon
    silur
Geographical name
    ČR-Čechy
    Praha-Radotín
Keyword
    Bohemia
    Central
    Cephalopod
    Czech
    Gradual
    Opening
    Orthoconic
    Republic
    Silurian
    Siphonal
    Tube
Abstract (in english)
   A specimen of an orthoconic cephalopod from the Silurian (Ludlow, Ludfordian), Kopanina Formation of Central Bohemia, described by Barrande (1870) as Orthoceras obelus, has been studied in detail. New information was obtained on the morphology of the sipho-cameral structure; the gradual opening of the siphonal tube, enabling the tissue to enter the gas chambers during the ontogeny, has been found out. The specimen was established the holotype of a new species Nucleoceras hollandi sp.n., and was, based on the proved presence of the cameral mantle, attributed to the Family Lamellorthoceratidae Teichert, 1961, Order Pallioceratida Marek, 1998
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    19. 2. 2008
Import date
    8. 8. 2012