Distinguishing features: Flat, elliptical, formed from six crystallographic blocks divided by near-radial sutures.
Farinacci & Howe catalog pages: H. agniniae *
Morphology: Flat, elliptical holococcolith formed from six crystallographic blocks divided by near-radial sutures.
Differentiation: Similar to Cretaceous coccoliths of the genus Calculites, but this species is distinguished by being flat and having six similarly-sized crystallographic blocks. [Bown & Newsam 2017]
Size: Holotype L = 4.9μm (Paratype L = 4.8μm).
|Tags||LITHS: holococcolith, elliptical, CA: closed, CROSS-POLARS: R-prominent,|
|Metrics||Lith size: 4->7µm; |
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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