Articles | Volume 43, issue 1
https://doi.org/10.5194/jm-43-139-2024
https://doi.org/10.5194/jm-43-139-2024
Research article
 | 
12 Jun 2024
Research article |  | 12 Jun 2024

Two new clavate Fragilariopsis and one new Rouxia diatom species with biostratigraphic and paleoenvironmental applications for the Pliocene-Pleistocene, East Antarctica

Grace Duke, Josie Frazer, Briar Taylor-Silva, and Christina Riesselman

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Cited articles

Armand, L. K., Crosta, X., Romero, O., and Pichon, J. J.: The biogeography of major diatom taxa in Southern Ocean sediments: 1. Sea ice related species, Palaeogeogr. Palaeocl., 223, 93–126, https://doi.org/10.1016/j.palaeo.2005.02.015, 2005. a, b, c
Armbrecht, L. H., Lowe, V., Escutia, C., Iwai, M., McKay, R., and Armand, L. K.: Variability in diatom and silicoflagellate assemblages during mid-Pliocene glacial-interglacial cycles determined in Hole U1361A of IODP Expedition 318, Antarctic Wilkes Land Margin, Mar. Micropaleontol., 139, 28–41, https://doi.org/10.1016/j.marmicro.2017.10.008, 2018. a
Balco, G. and Rovey, C. W.: Absolute chronology for major Pleistocene advances of the Laurentide Ice Sheet, Geology, 38, 795–798, https://doi.org/10.1130/G30946.1, 2010. a
Barron, J. A.: Diatom constraints on the position of the Antarctic Polar Front in the middle part of the Pliocene, Mar. Micropaleontol., 27, 195–213, https://doi.org/10.1016/0377-8398(95)00060-7, 1996. a, b, c
Bertram, R. A., Wilson, D. J., van de Flierdt, T., McKay, R. M., Patterson, M. O., Jimenez-Espejo, F. J., Escutia, C., Duke, G. C., Taylor-Silva, B. I., and Riesselman, C. R.: Pliocene deglacial event timelines and the biogeochemical response offshore Wilkes Subglacial Basin, East Antarctica, Earth aPlanet. Sc. Lett., 494, 109–116, https://doi.org/10.1016/j.epsl.2018.04.054, 2018. a, b, c
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Short summary
Diatoms are dust-sized algae commonly found in the upper 100 m of the Southern Ocean. In this paper, we describe three new species found in sediments west of the Ross Sea, East Antarctica, aged about 3--2 Ma: Fragilariopsis clava, Fragilariopsis armandae, and Rouxia raggattensis. These species may be useful for determining the age of sediments and past environmental conditions at other locations around the Southern Ocean.
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