Pontosphaera romansii


Classification: ntax_cenozoic -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera romansii
Sister taxa: << < 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, P. exilis, P. pax ⟩⟨> >>

Taxonomy:

Citation: Pontosphaera romansii Bown & Newsam 2017
Rank: Species

Distinguishing features: Large, narrowly elliptical, lens-shaped pontosphaerid with high rim and apparently vacant central area.

Farinacci & Howe catalog pages: P. romansii *


Morphology: Large, narrowly elliptical, lens-shaped pontosphaerid with high rim and apparently vacant central area.
Differentiation: Distinguised from other pontosphaerids by the high, lens-shaped rim. [Bown & Newsam 2017]

Size: Holotype L = 10.5μm (Paratype L = 11.9μm). [Bown & Newsam 2017]

Search data:
TagsLITHS: murolith, elliptical, CA: vacant, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 9->13µm;
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 NP15b subzone (44.12-45.49Ma, top in Lutetian 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 romansii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1096 Go to Archive.is to create a permanent copy of this page - citation notes



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