Record details

Title
    Kirkocystid ankyroids (Stylophora: Echinodermata) from the Šárka Formation (Ordovician) of Bohemia
Statement of responsibility
    Ronald L. Parsley, Rudolf J. Prokop, Kraig Derstler
Other titles
    Kirkocystidní ankyroidi (Stylophora: Echinodermata) ze šáreckého souvrství českého ordoviku
Author
    Derstler, Kraig
    Parsley, Ronald L.
    Prokop, Rudolf J.
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 75, no. 1
Pages
    s. 37-47
Year
    2000
Notes
    1 obr., 2 pl.
    České resumé
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    Barrandien
    Echinodermata
    morfologie funkční
    nový taxon
    ontogeneze
    ordovik
    pražská pánev
    Stylophora
    taxonomie
Geographical name
    ČR-Čechy
    Praha-Šárka
Keyword
    Ankyroids
    Bohemia
    Echinodermata
    Formation
    Kirkocystid
    Ordovician
    Stylophora
    Šárka
Abstract (in english)
   Kirkocystids were originally described as the cirriped genus Anatifopsis Barrande, 1872. Now recognized as stylophoran echinoderms, kirkocystid from the Llanvirn age Šárka Formation are represented by two monospecific genera: Anatifopsis (=Anatiferocystis Chauvel, 1941) bohemica Barrande, 1872 and Sagittacystis gen.nov. (=Balanocytsites Barrande, 1887) prima (=Anatifopsis prima Barrande, 1872). During Arenigian, kirkocystids probably evolved from Peltocystis-like ancestors in the relatively dysaerobic Prague Basin which seems to be the centre for dispersal for subsequent representatives found in the Western United States. The kirkocystid theca has been reduced to six plates, dominated by the paired adorals, but within the subclade the aulacophore has remained conservative and primitive. Like in most ankyroids kirkocystid thecae are flexible, but quite exceptionally, they could apparently expand and contracts along dorsal and ventral sutures of the righ adoral.
   Juvenile specimens indicate that ontogenetic development accentuates plate growth towards the thecal posterior
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    5. 4. 2007
Import date
    8. 8. 2012