Record details

    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.)
    Fatka, Oldřich, 1957-
    Lefebvre, Bertrand
Source title - serial
    Palaeogeography, palaeoclimatology, palaeoecology
    Vol. 195, no. 1-2
    p. 73-97
    5 obr., 7 s. bibl.
    Zkr. název ser.: Palaeogeogr. Palaeoclimatol. Palaeoecol.
Subject group
    diverzita druhová
Geographical name
    Velká Británie
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
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    4. 12. 2007
Import date
    8. 8. 2012