Journal article
Post-Cambrian trilobite diversity and evolutionary faunas
Science (American Association for the Advancement of Science), Vol.280(5371), pp.1922-1925
06/19/1998
DOI: 10.1126/science.280.5371.1922
PMID: 9632387
Abstract
A cluster analysis of the stratigraphic distribution of all Ordovician trilobite families, based on a comprehensive taxonomic database, identified two major faunas with disjunct temporal diversity trends. The Ibex Fauna behaved as a cohort, declining through the Ordovician and disappearing at the end-Ordovician mass extinction. In contrast, the Whiterock Fauna radiated rapidly during the Middle Ordovician and gave rise to all post-Ordovician trilobite diversity. Its pattern of diversification matches that of the Paleozoic Evolutionary Fauna; hence, trilobites were active participants in the great Ordovician radiations. Extinction patterns at the end of the Ordovician are related to clade size: Surviving trilobite families show higher genus diversity than extinguished families.
Details
- Title: Subtitle
- Post-Cambrian trilobite diversity and evolutionary faunas
- Creators
- Jonathan M Adrain - American Museum of Natural HistoryRichard A Fortey - University of OklahomaStephen R Westrop - University of Oklahoma
- Resource Type
- Journal article
- Publication Details
- Science (American Association for the Advancement of Science), Vol.280(5371), pp.1922-1925
- Publisher
- American Association for the Advancement of Science
- DOI
- 10.1126/science.280.5371.1922
- PMID
- 9632387
- ISSN
- 0036-8075
- eISSN
- 1095-9203
- Language
- English
- Date published
- 06/19/1998
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229291502771
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