Pontosphaera formosa


Classification: ntax_cenozoic -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera formosa
Sister taxa: << < P. discopora, P. distincta, P. enormis, 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> >>

Taxonomy:

Citation: Pontosphaera formosa (Bukry & Bramlette, 1969) Romein, 1979
Rank: Species
Basionym: Syracosphaera formosa Bukry & Bramlette, 1969
Variants: Syracosphaera labrosa Bukry & Bramlette (1969) - flange translucent in plane polarised light

Distinguishing features: Large (9-17 µm) Pontosphaera with high flaring rim and distal flange that displays discernible elements in light microscope. The plate is thin and indistinct in XPL, typically with large central hole.

Farinacci & Howe catalog pages: S. formosa * , S. labrosa *

Search data:
TagsLITHS: murolith, elliptical, CA: vacant, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 9->17µm;
Data source notes: lith size from Bown 2005
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP14 zone (46.29-49.11Ma, base in Ypresian stage). Data source: [PRB rough estimate]

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

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O

Bukry, D. & Bramlette, M. N. (1969b). Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. Tulane Studies in Geology. 7: 131-142. gs V O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs

Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 30(1): 57-79. gs V O

Perch-Nielsen, K. (1977a). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs V O

Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs V O

Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs


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Pontosphaera formosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-2-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1074 Go to Archive.is to create a permanent copy of this page - citation notes



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