Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 41, issue 2
Articles | Volume 41, issue 2
https://doi.org/10.5194/jm-41-107-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-41-107-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 41, issue 2
Research article
 | 
01 Aug 2022
Research article |  | 01 Aug 2022

Spine-like structures in Paleogene muricate planktonic foraminifera

Paul N. Pearson, Eleanor John, Bridget S. Wade, Simon D'haenens, and Caroline H. Lear

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Latest update: 28 Oct 2025
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Short summary
The microscopic shells of planktonic foraminifera accumulate on the sea floor over millions of years, providing a rich archive for understanding the history of the oceans. We examined an extinct group that flourished between about 63 and 32 million years ago using scanning electron microscopy and show that they were covered with needle-like spines in life. This has implications for analytical methods that we use to determine past seawater temperature and acidity.
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