Per Ahlberg
Professor emeritus
Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity
Författare
Redaktör
- David A.T. Harper
- Thomas Servais
Summary, in English
Palaeobiogeographical data on Cambrian trilobites obtained during the twentieth century are combined in this paper to evaluate
palaeoceanographic links through c. 30 myr, once these arthropods biomineralized. Worldwide major tectonostratigraphic units are
characterized at series intervals of Cambrian time and datasets of trilobite genera (629 for Cambrian Series 2, 965 for Cambrian Series 3, and 866 for the Furongian Series) are analysed using parsimony analysis of endemicity. Special attention is given to the biogeographical observations made in microcontinents and exotic terranes. The same is done for platform-basinal transects of well-known continental margins. The parsimony analysis of endemicity analysis resulted in distinct palaeogeographical area groupings among the tectonostratigraphic units. With these groupings, several palaeobiogeographical units are distinguished, which do not necessarily fit the previously proposed biogeographical realms and provinces. Their development and spatial distributions are broadly controlled by Cambrian palaeoclimates, palaeogeographical conditions (e.g. carbonate productivity and anoxic conditions) and ocean current circulation.
palaeoceanographic links through c. 30 myr, once these arthropods biomineralized. Worldwide major tectonostratigraphic units are
characterized at series intervals of Cambrian time and datasets of trilobite genera (629 for Cambrian Series 2, 965 for Cambrian Series 3, and 866 for the Furongian Series) are analysed using parsimony analysis of endemicity. Special attention is given to the biogeographical observations made in microcontinents and exotic terranes. The same is done for platform-basinal transects of well-known continental margins. The parsimony analysis of endemicity analysis resulted in distinct palaeogeographical area groupings among the tectonostratigraphic units. With these groupings, several palaeobiogeographical units are distinguished, which do not necessarily fit the previously proposed biogeographical realms and provinces. Their development and spatial distributions are broadly controlled by Cambrian palaeoclimates, palaeogeographical conditions (e.g. carbonate productivity and anoxic conditions) and ocean current circulation.
Publiceringsår
2013
Språk
Engelska
Sidor
273-296
Publikation/Tidskrift/Serie
Early Palaeozoic Biogeography and Palaeogeography
Volym
Memoir 38
Avvikelse
38
Dokumenttyp
Kapitel samlingsverk
Förlag
Geological Society of London
Ämne
- Geology
Aktiv
Published
Report number
Memoir 38
ISBN/ISSN/Övrigt
- ISBN: 978-1-86239-373-8
- ISSN: 0435-4052