Biometric insights on the calcareous nannofossil genus <i>Aspidolithus</i> across the Santonian–Campanian boundary: Western Interior (Niobrara, USA) vs.  Tethys (Loibichl and Postalm, Austria) sections

Granero, Paula; Wagreich, Michael; Wierzbicki, Adam; Watkins, David

doi:https://doi.org/10.5194/jm-44-469-2025

Articles | Volume 44, issue 2

https://doi.org/10.5194/jm-44-469-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/jm-44-469-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 44, issue 2

Research article

|

03 Nov 2025

Research article |

| 03 Nov 2025

Biometric insights on the calcareous nannofossil genus Aspidolithus across the Santonian–Campanian boundary: Western Interior (Niobrara, USA) vs. Tethys (Loibichl and Postalm, Austria) sections

Paula Granero, Michael Wagreich, Adam Wierzbicki, and David Watkins

Supplement

https://doi.org/10.5194/jm-44-469-2025-supplement

Data sets

Supplementary material for ``Morphometric insights on Aspidolithus across the Santonian–Campanian boundary: Western Interior vs. Tethys'' P. Granero Ordóñez https://doi.org/10.5281/zenodo.17093271

Short summary

We present a morphometric study of the calcareous nannofossil Aspidolithus across the Santonian–Campanian boundary, based on material from the Western Interior (USA) and the Tethys (Austria). The results reveal that size variation correlates with sea surface temperature. These findings have implications for the taxonomy, palaeoecology, and biostratigraphy of Upper Cretaceous planktonic assemblages.