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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, 20, 1987
https://doi.org/10.1144/jm.6.2.89
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 6, 20, 1987
https://doi.org/10.1144/jm.6.2.89
© Author(s) 1987. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Nov 1987

01 Nov 1987

Durotrigia daveyi gen. et sp. nov., an Early Bajocian dinocyst with a variable precingular archaeopyle

David Bailey David Bailey
  • Stratigraphic Laboratory, BP Petroleum Development Limited, Farburn Industrial Estate, Dyce, Aberdeen AB2 0PB, Scotland

Abstract. Durotrigia daveyi gen. et sp. nov. is described from the Inferior Oolite (Early Bajocian) of Dorset, England. It is the earliest distinctly tabulated gonyaulacacean dinocyst with a precingular archaeopyle. The archaeopyle is apparently variable, involving the loss of between 1 and 5 precingular plates. This variability poses some interesting taxonomic problems, particularly the implications to the value of the archaeopyle type as a high-level classification criterion. Some possible causes of archaeopyle variability are discussed.

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