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Pentadinium alabamensis: A new, unusual dinoflagellate from the early Oligocene of the Gulf Coast, Alabama, USA
Quaijtaal, W.; Brinkhuis, H. (2012). Pentadinium alabamensis: A new, unusual dinoflagellate from the early Oligocene of the Gulf Coast, Alabama, USA. Rev. Palaeobot. Palynol. 175: 47-54. http://dx.doi.org/10.1016/j.revpalbo.2012.03.002
In: Review of Palaeobotany and Palynology. Elsevier: Tokyo; Oxford; Lausanne; New York; Shannon; London; Amsterdam. ISSN 0034-6667; e-ISSN 1879-0615, more
Peer reviewed article  
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Keyword
    Marine/Coastal
Author keywords
    organic walled dinoflagellate cysts; Eocene; Oligocene transition; St. Stephens Quarry; Alabama; USA
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Abstract
    The Eocene–Oligocene Transition (EOT, ~ 34 Ma) marks the onset of major Antarctic ice sheets. The environmental consequences of the transition included major changes in e.g., sea level, temperature, and ocean circulation, complicating biostratigraphic correlations in this interval. Organic walled dinoflagellate cysts (dinocysts) however do show potential for EOT biostratigraphy, especially for ancient shallow marine settings.At St. Stephens Quarry, Alabama, USA, we found a new, extremely suturocavate dinocyst, Pentadinium alabamensis sp. nov., described herein. The range of the new species spans the critical EOT magnetosubchron C13n, making this taxon a useful biostratigraphic marker for this interval in the Gulf Coast region. The species appears to be associated with shallow marine, euryhaline conditions.
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