Distinguishing features: medium-sized (5–9μm), circular to subcircular with relatively wide central area
Farinacci & Howe catalog pages: E. aliquanta *
Morphology: Medium-sized (5–9μm), circular to subcircular Ericsonia coccoliths with a central area width similar to or greater than the rim width.
Distinguished from E. robusta by its smaller size, from E. orbis by its larger size and from E. subpertusa by its relatively wider central area. Previous work most likely included these forms in E. robusta.
|Tags||LITHS: placolith, circular, CA: vacant, |
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
|Metrics||Lith size: 5->9µm; |
Data source notes: lith size from OD
Last occurrence (top): within NP9 zone (55.86-57.21Ma, top in Ypresian stage). Data source: Bown 2016
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Bown 2016
Plot of occurrence data:
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