Distinguishing features: Small, elliptical with open central area spanned by broad transverse bar (dark at 0°)
Farinacci & Howe catalog pages: H. liuii *
Morphology: Small, elliptical holococcolith with narrow rim and broad bar that almost fills the central area; the bar is dark at 0° and birefringent at 45°.
Differentiation: Similar to H. serus but is more regular in outline and shows no perforations. [Bown & Newsam 2017]
Size: Holotype L = 3.9μm (Paratype L = 3.9μm).
|Tags||LITHS: holococcolith, elliptical, CA: bar, CROSS-POLARS: R-prominent,|
|Metrics||Lith size: 3.5->4.5µm; |
Data source notes: lith size from OD & extended slightly
Last occurrence (top): within NP14b subzone (46.29-47.84Ma, top in Lutetian stage). Data source: Bown & Newsam 2017
First occurrence (base): within NP14b subzone (46.29-47.84Ma, base in Lutetian stage). Data source: Bown & Newsam 2017
Plot of occurrence data:
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