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Morphology and distribution of the Miocene dinoflagellate cysts Operculodinium? borgerholtense Louwye, 2001, emend
Soliman, A.; Head, M.J.; Louwye, S. (2009). Morphology and distribution of the Miocene dinoflagellate cysts Operculodinium? borgerholtense Louwye, 2001, emend. Palynology 33(2): 73-84. https://dx.doi.org/10.1080/01916122.2009.9989685
In: Palynology. American Association of Stratigraphic Palynologists: Austin, Tex. etc.. ISSN 0191-6122; e-ISSN 1558-9188, more
Peer reviewed article  

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Keyword
    Marine/Coastal
Author keywords
    Operculodinium? borgerholtense; Miocene dinoflagellate cysts;morphology; taxonomy

Authors  Top 
  • Soliman, A.
  • Head, M.J.
  • Louwye, S., more

Abstract
    The extinct, organic-walled, proximochorate dinoflagellate cyst Operculodiniuml borgerholtense Louwye 2001 was first described from Miocene shallow-marine deposits of northern Belgium, and has since been documented from the Miocene of the eastern North Atlantic, North Sea, Austria, Hungary, and Egypt. Conventional and confocal light microscopy and scanning electron microscopy are used to reveal new details of the archeopyle, wall structure, and ornament. The archeopyle is shown to have well-defined rather than rounded angles, a distinction we consider significant in assigning this species only provisionally to the genus. Operculodiniuml borgerholtense was a euryhaline neritic species highly tolerant of environmental stress, a feature consistent with its morphological variability. Present records indicate a tropical-subtropical to temperate paleoclimatic distribution. It ranges from the upper Lower Miocene to upper Middle Miocene, and promises to be a useful Stratigraphic marker particularly in neritic settings where adverse paleoenvironmental factors have excluded other species.

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