arrayname: original
Taxonomy:
Distinguishing features:
Parent taxon (Pontosphaera): Coccoliths are muroliths, central area with variable number of perforations. V-units form narrow imbricate outer wall, R-units form inner wall and central-area.
This taxon: Very large, elliptical with broad, high rim and narrow central opening.
Farinacci & Howe catalog pages: P. brinkhuisii *
Morphology:
Remarks: Possibly the taxon that Bralower & Mutterlose (1995) call Reticulofenestra “grandis” with a reported range of Zones NP15–16.
Differentiation: Distinguised from other Pontosphaera by larger size, thick rim cycles and vacant central area. [Bown & Newsam 2017]
Size:
LITHS: murolith, elliptical, CA: ca_conjunct, CROSS-POLARS: V-prominent, R-prominent, rim-bicyclic, |
Lith size: 15->22µm; Data source notes: lith size from OD and slightly extended |
Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: Bown & Newsam 2017
First occurrence (base): within NP15b subzone (44.12-45.49Ma, base in Lutetian stage). Data source: Bown & Newsam 2017
Plot of occurrence data:
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Pontosphaera brinkhuisii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-3-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1065 Go to Archive.is to create a permanent copy of this page - citation notes |
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