Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity

J. Javier ÁLvaro*, Per Ahlberg, Loren E. Babcockl.E., Osvaldo L. Bordonaro, Duck K. Choi, Roger A. Cooper, Gappar K H Ergaliev, I. Wesley Gapp, Mansoureh Ghobadi Pour, Nigel C. Hughes, James B. Jago, Igor Korovnikov, John R. Laurie, Bruce S. Lieberman, John R. Paterson, Tatyana V. Pegel, Leonid E. Popov, Adrian W A Rushton, Sergei S. Sukhov, M. Franco Tortello & 2 others Zhiyi Zhou, Anna Zylińska

*Corresponding author for this work

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Abstract

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.

Original languageEnglish
Pages (from-to)273-296
Number of pages24
JournalGeological Society Memoir
Volume38
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

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ÁLvaro, J. J., Ahlberg, P., Babcockl.E., L. E., Bordonaro, O. L., Choi, D. K., Cooper, R. A., ... Zylińska, A. (2013). Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity. Geological Society Memoir, 38(1), 273-296. https://doi.org/10.1144/M38.19