Articles | Volume 19, issue 3
https://doi.org/10.5194/bg-19-777-2022
https://doi.org/10.5194/bg-19-777-2022
Research article
 | 
09 Feb 2022
Research article |  | 09 Feb 2022

Test-size evolution of the planktonic foraminifer Globorotalia menardii in the eastern tropical Atlantic since the Late Miocene

Thore Friesenhagen

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Cited articles

André, A., Weiner, A., Quillévéré, F., Aurahs, R., Morard, R., Douady, C. J., de Garidel-Thoron, T., Escarguel, G., de Vargas, C., and Kucera, M.: The cryptic and the apparent reversed: lack of genetic differentiation within the morphologically diverse plexus of the planktonic foraminifer Globigerinoides sacculifer, Paleobiology, 39, 21–39, https://doi.org/10.5061/dryad.rb06j, 2013. 
André, A., Quillévéré, F., Schiebel, R., Morard, R., Howa, H., Meilland, J., and Douady, C. J.: Disconnection between genetic and morphological diversity in the planktonic foraminifer Neogloboquadrina pachyderma from the Indian sector of the Southern Ocean, Mar. Micropaleontol., 144, 14–24, https://doi.org/10.1016/j.marmicro.2018.10.001, 2018. 
Bard, E. and Rickaby, R. E. M.: Migration of the subtropical front as a modulator of glacial climate, Nature, 460, 380–383, https://doi.org/10.1038/nature08189, 2009. 
Bartoli, G., Sarnthein, M., Weinelt, M., Erlenkeuser, H., Garbe-Schönberg, D., and Lea, D. W.: Final closure of Panama and the onset of northern hemisphere glaciation, Earth Planet. Sc. Lett., 237, 33–44, https://doi.org/10.1016/j.epsl.2005.06.020, 2005. 
Bé, A. W. H., Caron, D. A., and Anderson, O. R.: Effects of feeding frequency on life processes of the planktonic foraminifer Globigerinoides sacculifer in laboratory culture, J. Mar. Biol. Assoc. UK, 61, 257–277, https://doi.org/10.1017/s002531540004604x, 1981. 
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Short summary
Size measurements of the planktonic foraminifer Globorotalia menardii and related forms are used to investigate the shell-size evolution for the last 8 million years in the eastern tropical Atlantic Ocean. Long-term changes in the shell size coincide with major climatic, palaeogeographic and palaeoceanographic changes and suggest the occurrence of a new G. menardii type in the Atlantic Ocean ca. 2 million years ago.
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