Pontosphaera brinkhuisii


Classification: ntax_cenozoic -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera brinkhuisii
Sister taxa: << < P. desuetoidea, P. geminipora, P. longiforaminis, P. megapachydisca, P. veta ⟩⟨ P. syracusana, P. alta, P. panarium, P. versa, P. wallacei, P. latoculata, P. sp.A ⟩⟨ P. formosa, P. wechesensis, P. fimbriata, P. brinkhuisii, P. hollisii, P. romansii ⟩⟨ P. japonica, P. plana, P. rimosa ⟩⟨ P. pectinata, P. wilsonii, P. punctosa, P. clinosulcata, P. perforomarginata, P. pulcheroides, P. pulchra, P. pygmaea ⟩⟨ P. ocellata, P. duocava> >>

Taxonomy:

Citation: Pontosphaera brinkhuisii Bown & Newsam 2017
Rank: Species

Distinguishing features: Very large, elliptical with broad, high rim and narrow central opening.

Farinacci & Howe catalog pages: P. brinkhuisii *


Morphology: Very large, elliptical pontosphaerid with broad, high rim and narrow, apparently vacant central area.
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: Holotype L = 21.2μm (Paratype L =17.1μm). [Bown & Newsam 2017]

Search data:
TagsLITHS: murolith, elliptical, CA: ca_conjunct, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 15->22µm;
Data source notes: lith size from OD and slightly extended
The morphological data given here can be used on the advanced search page. See also these notes

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:

References:

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs V O

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Pontosphaera brinkhuisii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-1-2021

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