Taxonomy:
Distinguishing features: Large Pontosphaera with flaring rim, central area filled by coarse radial crystals
Farinacci & Howe catalog pages: P. wallacei *
Search data:Tags | LITHS: murolith, elliptical, CA: closed, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 8->12µm; Data source notes: lith size from OD & illustrated specimens |
Geological Range:
Last occurrence (top): within NN2 zone (19.00-22.82Ma, top in Burdigalian stage). Data source: original description
First occurrence (base): within NP24 zone (26.84-29.62Ma, base in Rupelian stage). Data source: original description
Plot of occurrence data:
Persico, D. & Villa, G. (2013). A new Oligocene-Miocene calcareous nannofossil species: Pontosphaera wallacei. Revue de Micropaléontologie. 56: 97-102. gsReferences:
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Pontosphaera wallacei compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2021
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