Distinguishing features: Small elliptical coccolith with birefringent inner cycle and non-birefringent outer cycle.
Original description: Diagnosis: Small elliptical coccolith consisting of a non-birefringent outer cycle and birefringent inner cycle.
Description: This elliptical coccolith is made up of two cycles of elements. The outer cycle is non-birefringent whilst the inner cycle is birefringent. No structure was observed in the central area. Examination under SEM is necessary to understand the true structure of this small species.
Farinacci & Howe catalog pages: S. oneillii *Search data:
|Tags||LITHS: murolith, elliptical, CA: ca_disjunct, CROSS-POLARS: rim-bicyclic, R-prominent, T-prominent,|
|Metrics||Lith size: 3->5µm; |
Data source notes: lith length from OD and slightly extended
Last occurrence (top): within NN10 zone (8.29-9.53Ma, top in Tortonian stage). Data source: da Gama & Varol 2013
First occurrence (base): within NN7 zone (10.89-11.90Ma, base in Serravallian stage). Data source: da Gama & Varol 2013
Plot of occurrence data:
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