On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal
The extinction of the Morozovella velascoensis lineage, a group of planktonic foraminifera that dominated tropical assemblages for;6.3 m.y., is investigated using an upper Paleocene/lower Eocene section from the central Pacific Ocean (ODP Site 865). Uppermost stratigraphic occurrenc-es of the lineag...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.567.2017 2023-05-15T18:00:44+02:00 On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal Progenesis In The Planktonic Foraminifera D. Clay Kelly Timothy J. Bralower James C. Zachos The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.2017 http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.2017 http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf text ftciteseerx 2016-01-08T12:18:55Z The extinction of the Morozovella velascoensis lineage, a group of planktonic foraminifera that dominated tropical assemblages for;6.3 m.y., is investigated using an upper Paleocene/lower Eocene section from the central Pacific Ocean (ODP Site 865). Uppermost stratigraphic occurrenc-es of the lineage consist solely of diminutive M. edgari, a species roughly half the size of its ancestor, M. velascoensis. Eigenshape analysis indicates that adult specimens of M. edgari are morphologically similar to small, presumably ju-venile, forms of M. velascoensis. The overall stratigraphic succession, where the uppermost occurrences of a lineage are represented by relict populations of minute, juvenilized forms, is consistent with a process called ‘‘terminal progen-esis.’ ’ Various lines of evidence indicate that stress-induced size reduction foreshadowed the extinction of other plank- Text Planktonic foraminifera Unknown Pacific |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
The extinction of the Morozovella velascoensis lineage, a group of planktonic foraminifera that dominated tropical assemblages for;6.3 m.y., is investigated using an upper Paleocene/lower Eocene section from the central Pacific Ocean (ODP Site 865). Uppermost stratigraphic occurrenc-es of the lineage consist solely of diminutive M. edgari, a species roughly half the size of its ancestor, M. velascoensis. Eigenshape analysis indicates that adult specimens of M. edgari are morphologically similar to small, presumably ju-venile, forms of M. velascoensis. The overall stratigraphic succession, where the uppermost occurrences of a lineage are represented by relict populations of minute, juvenilized forms, is consistent with a process called ‘‘terminal progen-esis.’ ’ Various lines of evidence indicate that stress-induced size reduction foreshadowed the extinction of other plank- |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Progenesis In The Planktonic Foraminifera D. Clay Kelly Timothy J. Bralower James C. Zachos |
spellingShingle |
Progenesis In The Planktonic Foraminifera D. Clay Kelly Timothy J. Bralower James C. Zachos On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
author_facet |
Progenesis In The Planktonic Foraminifera D. Clay Kelly Timothy J. Bralower James C. Zachos |
author_sort |
Progenesis In The Planktonic Foraminifera |
title |
On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
title_short |
On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
title_full |
On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
title_fullStr |
On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
title_full_unstemmed |
On the Demise of the Early Paleogene Morozovella velascoensis Lineage: Terminal |
title_sort |
on the demise of the early paleogene morozovella velascoensis lineage: terminal |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.2017 http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.2017 http://www.es.ucsc.edu/~jzachos/pubs/KBZ_2001.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766169947003682816 |