Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 45, issue 2
Articles | Volume 45, issue 2
https://doi.org/10.5194/jm-45-581-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-45-581-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 45, issue 2
Research article
 | 
11 Aug 2026
Research article |  | 11 Aug 2026

Quaternary Arctic planktonic foraminifera: morphological differentiation and taxonomic reassessment of subpolar spinose taxa

Helen K. Coxall, Thomas M. Cronin, Kate Darling, Katrine Husum, Tamara Handl, Brian T. Huber, Megh M. Kanvinde, Mohammad Razmjooei, Flor Vermassen, Antje H. L. Voelker, Tirza M. Weitkamp, and Matt O'Regan

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Short summary
Today’s sea-ice-covered Arctic Ocean hosts only one species of calcifying planktonic foraminifera, unlike warmer oceans with diverse communities. Fossils show that other species once inhabited the Arctic, but their identities and environmental significance remain uncertain. Using detailed microscopy and hundreds of shell measurements, we resolve these fossil species and establish a new taxonomic framework providing the foundation for improved reconstructions of Quaternary Arctic climate history.
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