Pontosphaera plana


Classification: ntax_cenozoic -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera plana
Sister taxa: << < 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 ⟩⟨ P. obliquipons, T. omarians ⟩⟨> >>

Taxonomy:

Citation: Pontosphaera plana (Bramlette & Sullivan, 1961) Haq, 1971
Rank: Species
Basionym: Discolithus planus Bramlette & Sullivan, 1961
Synonyms:
Variants: Pontosphaera inconspicua (Sullivan 1964) Perch-Nielsen 1984 - used for small, early specimens.

Distinguishing features: Simple unadorned plate, typically with two narrow longitudinal slits; margin narrow or inconspicuous.

Farinacci & Howe catalog pages: D. planus * , D. inconspicuus * , D. ovata * , D. segmenta *

Search data:
TagsLITHS: murolith, elliptical, CA: closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 5->12µm;
Data source notes: lith size from ODs & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Palaeocene occurrences are discussed in Bown (2005) and  Bown (2016)
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: [PRB rough estimate]
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Bown 2016

Plot of occurrence data:

References:

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

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O

Bramlette, M. N. & Sullivan, F. R. (1961). Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology. 7(2): 129-188. gs

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

Haq, B. U. (1971). Paleogene calcareous nannoflora. Parts I-IV. Stockholm Contributions in Geology. 25: 1-158. 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

Okada, H. & Thierstein, H. R. (1979). Calcareous nannoplankton - Leg 43, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 43: 507-573. gs V O

Perch-Nielsen, K. (1971c). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

Perch-Nielsen, K. (1981b). New Maastrichtian and Paleocene calcareous nannofossils from Africa, Denmark, and USA and the Atlantic, and some Paleocene lineages. Eclogae Geologicae Helvetiae. 74(3): 831-863. gs V O

Perch-Nielsen, K. (1984b). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs V O

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs V O

Shepherd, C. L. & Kulhanek, D. K. (2016). Eocene nannofossil biostratigraphy of the mid-Waipara River section, Canterbury Basin, New Zealand. Journal of Nannoplankton Research. 26(1): 33-59. gs V O

Varol, O. (1989a). Calcareous nannofossil study of the central and western Solomon Islands. Circum-Pacific Council for Energy and Mineral Resources Earth Sciences. 239-268. gs V O

Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs V O


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Pontosphaera plana compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-1-2021

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