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Completeness of the known graptoloid palaeontological record

View ORCID ProfileMichael Foote, View ORCID ProfilePeter M. Sadler, Roger A. Cooper and View ORCID ProfileJames S. Crampton
Journal of the Geological Society, 176, 1038-1055, 23 July 2019, https://doi.org/10.1144/jgs2019-061
Michael Foote
1Department of the Geophysical Sciences, University of Chicago, Chicago, 60637, USA
Roles: [Conceptualization (Lead)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Supporting)], [Software (Supporting)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
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  • ORCID record for Michael Foote
  • For correspondence: mfoote@uchicago.edu
Peter M. Sadler
2Department of Earth Sciences, University of California, Riverside, 92521, USA
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Software (Lead)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
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Roger A. Cooper
3GNS Science, Lower Hutt 5040, New Zealand
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
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James S. Crampton
3GNS Science, Lower Hutt 5040, New Zealand
4School of Geography, Environment, and Earth Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
Roles: [Data curation (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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Abstract

Using a high-resolution chronology of graptoloid first and last appearances, we apply mathematical models that allow the simultaneous inference of the probability distribution of species durations and the effective sampling rate relating those durations to the observed stratigraphic ranges. This approach allows the completeness of the documented palaeontological record of graptoloids to be assessed. We estimate that c. 75% of species in the geographical regions that contribute to the stratigraphic data have been sampled and that, of those species known from more than a single stratigraphic horizon, c. 85% of their original durations, on average, are represented by their global composite stratigraphic ranges. As expected in light of their biostratigraphic importance, graptoloids have one of the most completely documented records among groups of fossil organisms. We expect that application of the methods used herein will show comparably complete records for other biostratigraphically relevant groups.

Supplementary material: The R code and data are available at https://doi.org/10.6084/m9.figshare.c.4547174

  • © 2019 The Author(s). Published by The Geological Society of London. All rights reserved
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Journal of the Geological Society: 176 (6)
Journal of the Geological Society
Volume 176, Issue 6
November 2019
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Completeness of the known graptoloid palaeontological record

Michael Foote, Peter M. Sadler, Roger A. Cooper and James S. Crampton
Journal of the Geological Society, 176, 1038-1055, 23 July 2019, https://doi.org/10.1144/jgs2019-061
Michael Foote
1Department of the Geophysical Sciences, University of Chicago, Chicago, 60637, USA
Roles: [Conceptualization (Lead)], [Formal analysis (Supporting)], [Investigation (Supporting)], [Methodology (Supporting)], [Software (Supporting)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Michael Foote
  • For correspondence: mfoote@uchicago.edu
Peter M. Sadler
2Department of Earth Sciences, University of California, Riverside, 92521, USA
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Software (Lead)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Peter M. Sadler
Roger A. Cooper
3GNS Science, Lower Hutt 5040, New Zealand
Roles: [Data curation (Equal)], [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
James S. Crampton
3GNS Science, Lower Hutt 5040, New Zealand
4School of Geography, Environment, and Earth Sciences, Victoria University of Wellington, Wellington 6140, New Zealand
Roles: [Data curation (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Writing - Original Draft (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for James S. Crampton

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Completeness of the known graptoloid palaeontological record

Michael Foote, Peter M. Sadler, Roger A. Cooper and James S. Crampton
Journal of the Geological Society, 176, 1038-1055, 23 July 2019, https://doi.org/10.1144/jgs2019-061
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