Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity

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.Fil: Alvaro, Javier J.. Centro de Astrobiología (INTA/CSIC); EspañaFil: Ahlberg, Per. Lund University. Department of Earth and Ecosystem Sciences, GeoBiosphere Science Centre; Suecia. The Ohio State University. School of Earth Sciences; Estados UnidosFil: Babcock, Loren E.. The Ohio State University. School of Earth Sciences; Estados UnidosFil: Bordonaro, Osvaldo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Científico Tecnológico Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Choi, Duck K.. School of Earth and Environmental Sciences, Seoul National University; Corea del SurFil: Cooper, Roger A.. GNS Science; Nueva ZelandaFil: Ergaliev, Gappar K. H.. National Academy of Sciences. Institute of Geological Sciences, ; Estados UnidosFil: Gapp, I. Wesley. University of Kansas. Department of Geology and Natural History Museum/Biodiversity Research Center, ; Estados UnidosFil: Pour, Mansoureg Ghobadi. Golestan University. Faculty of Sciences. Department of Geology; IránFil: Huges, Nigel C.. University of California. Department of Earth Sciences; Estados UnidosFil: Jago, James B.. University of South Australia. School of Natural and Built Environments; AustraliaFil: Korovnikiv, Igor. Siberian Branch of Russian Academy of Sciences. Institute of Petroleum Geology and Geophysics; RusiaFil: Laurie, John R.. Geoscience Australia. Petroleum and Marine Division; AustraliaFil: Lieberman, Bruce S.. University of Kansas. Department of Geology and Natural History Museum/Biodiversity Research Center; Estados UnidosFil: Paterson, John R.. University of New England. School of Environmental & Rural Science. Division of Earth Sciences; AustraliaFil: Pegel, Tatiana V.. Geophysics and Mineral Resources. Siberian Research Institute of Geology; RusiaFil: Popov, Leonid E.. National Museum of Wales. Department of Geology; Reino UnidoFil: Rushton, Adrian W. A.. The Natural History Museum. Palaeontological Department; Reino UnidoFil: Sukhov, Sergei S.. Geophysics and Mineral Resources. Siberian Research Institute of Geology; Reino UnidoFil: Toretello, Franco M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales; ArgentinaFil: Zhou, Zhiyi. Chinese Academy of Sciences. Nanjing Institute of Geology and Palaeontology; ChinaFil: Zylinska, Anna. University of Warsaw. Faculty of Geology; Poloni

Chapter 19 Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity

<p>Palaeobiogeographical data on Cambrian trilobites obtained during the twentieth century are combined in this paper to evaluate palaeoceanographic links through <em>c.</em> 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. </p