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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 6, issue 2
J. Micropalaeontol., 6, 15, 1987
https://doi.org/10.1144/jm.6.2.29
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 6, 15, 1987
https://doi.org/10.1144/jm.6.2.29
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Nov 1987

01 Nov 1987

Palaeoecology of a hypersaline Carboniferous ostracod fauna

Chris P. Dewey Chris P. Dewey
  • Department of Geology and Geography, Mississippi State University, Mississippi State, MS 39762, U.S.A

Abstract. A high abundance, low diversity ostracod fauna has been collected from the Lower Carboniferous Dimock and Phillips limestones in Nova Scotia, Canada. The ostracod fauna consists of Paraparchites sp. aff. P. kellettae Sohn and Beyrichiopsis lophota Copeland, as well as rare specimens of Acratia acuta (Jones & Kirkby), Bythocypris aequalis (Jones & Kirkby), and Chamishaella suborbiculata (Munster).

Growth parameters for the dominant ostracod, Paraparchites sp. aff. P. kellettae, show that a multi-generation, progenetic, parthenogenetic population developed. This reproductive strategy caused rapid population growth and thereby allowed the species to take advantage of the available environmental resources.

When considered together, the ostracod fauna and the sedimentology indicate that physiologically stressful hypersaline conditions prevailed. The combined data therefore provide evidence for hypersalinity tolerance and heterochronous development amongst Carboniferous ostracods.

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