Podrobnosti záznamu

Název
    Palaeobiogeography of Tethyan ammonites during the Tithonian (latest Jurassic)
Údaj o odpovědnosti
    Fabrizio Cecca
Autor
    Cecca, Fabrizio
Jazyk
    anglicky
Zdrojový dokument - seriál
    Palaeogeography, palaeoclimatology, palaeoecology
Svazek/č.
    Vol. 147, no. 1-2
Strany
    p. 1-37
Rok
    1999
Poznámky
    11 obr., 2 tab., 7 s.bibl.
    Zkr. název ser.: Palaeogeogr. Palaeoclimatol. Palaeoecol.
Předmětová skupina
    Ammonoidea
    jura
    paleobiogeografie
    paleobiologie
    provincie faunistická
    Tethys
    tithon
Geografické jméno
    Afrika
    Asie
    ČR-Morava
    Evropa
    Kroměříž
    Štramberk (Nový Jičín)
Klíčové slovo
    Ammonites
    During
    Jurassic
    Latest
    Palaeobiogeography
    Tethyan
    Tithonian
Abstrakt (anglicky)
   This study deals with the palaeobiogeographic distribution of Tethyan ammonites in the Tithonian. In particular, the relationships between ammonites of the Mediterranean Tethys, East Africa, Caribbean and Southeast pacific areas are discussed. The study of palaeobiogeographical raw data allows one to recognize palaeobiogeographic patterns and delimit provinces and to infer palaeobiogeographical processes and, in some cases, palaeogeographical (geological) processes. Biological and physical factors affecting the palaeobiogeographic distribution of the ammonites are reviewed prior to a discussion of the distributional patterns. The analysis is constrained by different factors such as taxonomy, sample size, accuracy of the biostratigraphic information, etc. The highly problematic taxonomy of the family Ataxioceratidae hampers the use of quantitative analyses, only allowing "phenetic" definitions of provinces.
   Some of the Tethyan palaeobiogeographic provinces already known in the literature are dealth with further. In particular the subdivision into Mediterranean and Sub-Mediterranean provinces (or sub-provinces), that is quite clear at the scale of the entire Jurassic period, is rejected in the Tithonian though a phase of faunal separation is recorded during the transition between the early and late Tithonian. The ammonite assemblages in shelves were less diverse and different from those of the distal, pelagic areas. Dispersal is recognized as an important process in ammonite palaeobiogeography although objective location of centres of origin is impossible. Vicariant phenomena certainly occurred but in marine environments barriers that separate areas of distribution instead of portions of space cannot be delimited objectively. The "barrier" is certainly represented by the different palaeoenvironmental contexts (shelf or pelagic habitats).
   The palaeobiogeographic distributions observed were produced by a complex of concurrent biogeographic processes
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    25. 3. 2008
Datum importu
    8. 8. 2012