Articles | Volume 45, issue 2
https://doi.org/10.5194/jm-45-547-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-45-547-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Emendation of the genera Selenopemphix and Multispinula (Peridiniales, Dinophyceae), with the description of Multispinula varispinosa sp. nov. and Multispinula robusta sp. nov.
Ophélie David
CORRESPONDING AUTHOR
Univ. Brest, CNRS, Ifremer, Geo-Ocean, UMR 6538, 29280 Plouzané, France
Ifremer, COAST/LER BO, Station de Biologie Marine, 29900 Concarneau, France
Pjotr Meyvisch
Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, Maryland, USA
Department of Geology, Ghent University, Ghent, Belgium
Haifeng Gu
Key Laboratory of Marine Ecology and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Gwenael Bilien
Ifremer, COAST/LER BO, Station de Biologie Marine, 29900 Concarneau, France
Dave Clarke
Marine Institute, Rinville, Oranmore, H91 R673, Galway, Ireland
Fabienne Marret
Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, UK
Kenneth N. Mertens
Ifremer, COAST/LER BO, Station de Biologie Marine, 29900 Concarneau, France
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This preprint is open for discussion and under review for Biogeosciences (BG).
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An unusual survey involving two vessels in the Argentine Sea over a 10 d period enabled synoptic observations of a significant toxic phytoplankton bloom. Simultaneous species characterization of the bloom, along with measurements of surface currents and mesoscale fronts, provided insights into its retention. Interdisciplinary approaches shed light on the biophysical coupling that underlies the persistence and horizontal transport of harmful algal blooms in productive continental shelves.
Lena Mareike Thöle, Peter Dirk Nooteboom, Suning Hou, Rujian Wang, Senyan Nie, Elisabeth Michel, Isabel Sauermilch, Fabienne Marret, Francesca Sangiorgi, and Peter Kristian Bijl
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Dinoflagellate cysts can be used to infer past oceanographic conditions in the Southern Ocean. This requires knowledge of their present-day ecologic affinities. We add 66 Antarctic-proximal surface sediment samples to the Southern Ocean data and derive oceanographic conditions at those stations. Dinoflagellate cysts are clearly biogeographically separated along latitudinal gradients of temperature, sea ice, nutrients, and salinity, which allows us to reconstruct these parameters for the past.
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Short summary
By combining incubation experiments, microscopy, biomolecular analyses, and spectroscopy to assess the biomacromolecular composition of cyst walls, we show that Selenopemphix and Multispinula represent two distinct cyst-based genera, with different preservation potentials. We emend their diagnoses and describe two new Multispinula species, M. varispinosa sp. nov. and M. robusta sp. nov., in addition to M. quanta.
By combining incubation experiments, microscopy, biomolecular analyses, and spectroscopy to...