Taxonomy:
Distinguishing features: Very large (16-19 µm), large pores around margin, and a few irregular pores in centre
Farinacci & Howe catalog pages: P. megapachydisca *
Search data:Tags | LITHS: murolith, elliptical, CA: ca_conjunct, pores, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 15->20µm; Data source notes: lith size from OD and slightly extended |
Geological Range:
Last occurrence (top): within NP14 zone (46.29-49.11Ma, top in Lutetian stage). Data source: Steurbaut 2011
First occurrence (base): within NP13 zone (49.11-50.50Ma, base in Ypresian stage). Data source: Steurbaut 2011
Plot of occurrence data:
Steurbaut, E. (2011). New calcareous nannofossil taxa from the Ypresian (Early Eocene) of the North Sea Basin and the Turan Platform in West Kazakhstan. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique Sciences de la Terre. 81: 247-277. gsReferences:
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Pontosphaera megapachydisca compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2021
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