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Toxisarcon taimyr sp. nov., a new large monothalamous foraminifer from the Kara Sea inner shelf

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Abstract

A large monothalamous foraminiferan, Toxisarcon taimyr sp. nov., has been isolated from the benthic samples from the Kara Sea inner shelf near the mouth of Yenisey river estuary, at a depth of 50–100 m. In its overall morphology, the new species closely resembles T. synsuicidica, one of the two species of Toxisarcon described to date. It possesses a large irregularly shaped cell body, covered by a thin layer of a fibrous organic coating. Numerous reticulopodia typically extend from all over the cell surface; the species is very motile and rapidly changes cell shape. Long and thick reticulopodial bundles form in the direction of movement. In the phylogenetic tree based on partial small-subunit ribosomal DNA (SSU rDNA) sequences, T. taimyr branches together with the two other known species of Toxisarcon within the clade C of monothalamous foraminifera.

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Acknowledgements

The cruise was funded by Programme 23 of the Presidium of Russian Academy of Sciences and by Russian Foundation for Basic Research grant 11-051-0070-k. We thank Emanuela Reo and Maria Holzmann for their help with sequencing. This work was supported by the Otto Schmidt Laboratory grant OSL-13-11, Swiss National Science Foundation grant 31003A-140766 and a research grant IZLR Z3_128338 from Science and Technology Cooperation Program Switzerland–Russia.

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Authors and Affiliations

  1. Department of Genetics and Evolution, University of Geneva, Quai Ernest-Ansermet 30, 1211, Geneva 4, Switzerland

    Ivan Voltski & Jan Pawlowski

  2. Department of Invertebrate Zoology, Saint-Petersburg State University, Universitetskaja emb. 7/9, 199034, Saint-Petersburg, Russia

    Ivan Voltski & Sergei Korsun

Authors
  1. Ivan Voltski
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  2. Sergei Korsun
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  3. Jan Pawlowski
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Correspondence to Ivan Voltski.

Electronic Supplementary Material

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Video of the cell body and granuloreticulopodia, magnification x630 (MPG 32506 kb)

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kml file for Google Earth software with coordinates of sampling locations. (KML 4 kb)

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Voltski, I., Korsun, S. & Pawlowski, J. Toxisarcon taimyr sp. nov., a new large monothalamous foraminifer from the Kara Sea inner shelf. Mar Biodiv 44, 213–221 (2014). https://doi.org/10.1007/s12526-014-0204-9

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  • DOI: https://doi.org/10.1007/s12526-014-0204-9

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