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Middle Telychian (Llandovery, Silurian) graptolites and biostratigraphy of the Howgill Fells, England, based upon the collections of D.W.R. Wilson housed in the Lapworth Museum of Geology, University of Birmingham

View ORCID ProfileDavid K. Loydell
Proceedings of the Yorkshire Geological Society, 63, 33-42, 23 March 2020, https://doi.org/10.1144/pygs2019-014
David K. Loydell
School of the Environment, Geography and Geosciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK
Roles: [Conceptualization (Lead)], [Data curation (Lead)], [Formal analysis (Lead)], [Investigation (Lead)], [Methodology (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
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Abstract

Examination of D.W.R. Wilson's PhD graptolite collection from the Howgill Fells, housed in the Lapworth Museum of Geology, University of Birmingham, reveals a high diversity (23 species) of middle Telychian graptolites from the uppermost Streptograptus crispus and Streptograptus sartorius (and possibly lowermost Monoclimacis griestoniensis) biozones. The collections include the first British records of Pseudoplegmatograptus hexagonalis and Pristiograptus pergratus. The stratigraphical range of P. pristinus is extended upwards, into the sartorius Biozone. One specimen of Stimulograptus clintonensis shows remarkable dorsal rhabdosome curvature proximally. Torquigraptus is particularly diverse in the sartorius Biozone with at least six species present: one new species, T. wilsoni, is described and two probable new species, one of which is very similar to the lower Telychian T. cavei, are left in open nomenclature.

  • © 2020 The Author(s). Published by The Geological Society of London for the Yorkshire Geological Society. All rights reserved
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Proceedings of the Yorkshire Geological 				Society: 63 (1)
Proceedings of the Yorkshire Geological Society
Volume 63, Issue 1
May 2020
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Middle Telychian (Llandovery, Silurian) graptolites and biostratigraphy of the Howgill Fells, England, based upon the collections of D.W.R. Wilson housed in the Lapworth Museum of Geology, University of Birmingham

David K. Loydell
Proceedings of the Yorkshire Geological Society, 63, 33-42, 23 March 2020, https://doi.org/10.1144/pygs2019-014
David K. Loydell
School of the Environment, Geography and Geosciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK
Roles: [Conceptualization (Lead)], [Data curation (Lead)], [Formal analysis (Lead)], [Investigation (Lead)], [Methodology (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
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Middle Telychian (Llandovery, Silurian) graptolites and biostratigraphy of the Howgill Fells, England, based upon the collections of D.W.R. Wilson housed in the Lapworth Museum of Geology, University of Birmingham

David K. Loydell
Proceedings of the Yorkshire Geological Society, 63, 33-42, 23 March 2020, https://doi.org/10.1144/pygs2019-014
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