Record details

Title
    The basal Silurian Akidograptus ascensus - Parakidograptus acuminatus Biozone in peri-Gondwanan Europe: graptolite assemblages, stratigraphical ranges and palaeobiogeography
Statement of responsibility
    Petr Štorch
Author
    Štorch, Petr
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 71, no. 2
Pages
    p. 177-188
Year
    1996
Notes
    6 obr., 2 s.bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    biostratigrafie
    Gondwana
    Graptoloidea
    ordovik
    paleobiogeografie
    plankton
    silur
    taxonomie
    zóny biostratigrafické
Subject category
    rozhraní stratigrafické
Geographical name
    Evropa jižní
    Evropa střední
Keyword
    Acuminatus
    Akidograptus
    Ascensus
    Assemblages
    Basal
    Biozone
    Europe
    Graptolite
    Palaeobiogeography
    Parakidograptus
    Peri-Gondwanan
    Ranges
    Silurian
    Stratigraphical
Abstract (in english)
   Moderately diverse, graptolite faunas of the ascensus-acuminatus Biozone, recorded from many Lower Paleozoic outcrops in peri-Gondwanan Europe (PGE), are considerably uniform. The faunas, however, allow a further, although as yet entirely informal, biostratigraphical subdivision of the biozone into at least three subzones. The lower subzone is characterized by abundant A. ascensus and Neodipl. lanceolatus, the middle one by Norm. trifilis, Cyst. ancestralis, and the co-occurrence of the two zonal index graptolites, and the upper subzone by the disappearance of A. ascensus and Neodipl. lanceolatus, appearance of Neodipl. dimiutus (apographon) and an abundance of Norm. normalis and Par. acuminatus.
   Though the true picture of Silurian graptolite biogeography may be obscured by graptolite misidentifications by some authors, clear differences between the acuminatus graptolite faunas of the PGE and Circum-equatorial provinces demonstrate a distinct provincialism of these early Silurian graptolite faunas
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    22. 2. 2008
Import date
    8. 8. 2012