Record details

Title
    Palaeogeographical and palaeoecological aspects of the Cambro-Ordovician radiation of echinoderms in Gondwanan Africa and peri-Gondwanan Europe
Statement of responsibility
    Bertrand Lefebvre, Oldřich Fatka
Other titles
    Early Palaeozoic Palaeo(bio)geographies of Western Europe and North Africa (Variant.)
Author
    Fatka, Oldřich, 1957-
    Lefebvre, Bertrand
Language
    anglicky
Source title - serial
    Palaeogeography, palaeoclimatology, palaeoecology
Vol./nr.
    Vol. 195, no. 1-2
Pages
    p. 73-97
Year
    2003
Notes
    5 obr., 7 s. bibl.
    il.
    Zkr. název ser.: Palaeogeogr. Palaeoclimatol. Palaeoecol.
Subject group
    Barrandien
    diverzita druhová
    Echinodermata
    Gondwana
    kambrium
    ordovik
    paleobiogeografie
    paleoekologie
Geographical name
    Alžírsko
    ČR-Čechy
    Francie
    Itálie-Sardinie
    Maroko
    Portugalsko
    SRN
    Španělsko
    Velká Británie
Keyword
    Africa
    Aspects
    Cambro-Ordovician
    Echinoderms
    Europe
    Gondwanan
    Palaeoecological
    Palaeogeographical
    Peri-Gondwanan
    Radiation
Abstract (in english)
   Ecology and tempo of the Lower Palaeozoic radiation of echinoderms are discussed in this paper based on comparison of the diversity patterns observed in Cambro-Ordovician faunas from Laurentia and the northern Gondwana margin. The Cambrian 'agronomic revolution' triggered a global radiation of echinoderms, with the progressive disappearance of biomat-related lifestyles, and the colonisation of new environments. Both in Laurentia and on the northern Gondwana margin, soft-substrate echinoderm assemblages related to cold and/or deep environments were dominated by blastozoans and stylophorans. These assemblages show a pattern of continuous diversification from the Middle Cambrian to the Middle Ordovician. The major radiation of crinoids in the Lower to Middle Ordovician of Laurentia is only a local diversification correlated with the development of hardgrounds in warm, shallow environments.
   No comparable major Ordovician radiation event occurred in the cooler environments of the northern Gondwana margin
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    4. 12. 2007
Import date
    8. 8. 2012