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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 3, issue 2
J. Micropalaeontol., 3, 18, 1984
https://doi.org/10.1144/jm.3.2.25
© Author(s) 1984. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 3, 18, 1984
https://doi.org/10.1144/jm.3.2.25
© Author(s) 1984. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Sep 1984

01 Sep 1984

Cyst-theca relationships in some Protoperidinium species (Peridiniales) from Scottish sea lochs

Jane Lewis*, J. D. Dodge*, and P. Tett Jane Lewis et al.
  • *Royal Holloway College, Botany Department, Egham, Surrey, TW20 0EX
  • Scottish Marine Biological Association, Dunstaffnage Marine Research Laboratory, PO Box 3, Oban, Argyll, PA34 4AD, Scotland

Abstract. Recent dinoflagellate cysts were collected from Scottish west coast sealoch sediments and germinated to establish cyst-theca relationships. Fourteen different Protoperidinium species have been germinated and studied using the scanning electron microscope. New cyst-theca relationships are described for Protoperidinium subinerme, P. thorianum and ?P. hangoei.

The archeopyle of the P. excentricum cyst is described for the first time. The archeopyles of the cysts of P. pentagonum (Trinovantedinium capitatum) and P. leonis (Quinquecuspis concretum) have previously been described as representing the loss of the second intercalary paraplate, but are here considered to represent the loss of this paraplate and also the fourth precingular paraplate.

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