Pontosphaera versa


Classification: Coccolithophores -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera versa
Sister taxa: P. multipora, 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, > >>

Taxonomy:

Citation: Pontosphaera versa (Bramlette & Sullivan, 1961) Sherwood, 1974
Rank: Species
Basionym: Discolithus versus Bramlette & Sullivan, 1961
Synonyms: Discolithina scissura Perch-Nielsen, 1971
Pontosphaera scissura (Perch-Nielsen, 1971) Romein, 1979

Distinguishing features: Simple unadorned plate, typically with two longitudinal slits, and a broad raised margin/rim.

Farinacci & Howe catalog pages: Discolithus versus * , Discolithina scissura *

Search data:
TagsLITHS: murolith, elliptical, hollow, RIM: rim-high, outer wall acw-imbricate, CA: pores, PROCESS: hollow,
CSPH: not known, V-UNITS: outer-rim, V-prominent, R-UNITS: c-str, inner-rim, px-plate, R-prominent, DETAILS: ca_conjunct, isogyres oblique, isogyres separated, rim-unicyclic,
MetricsLith size: 8->15µm;
Sources: lith size from OD & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: Bown 2005
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: [PRB rough estimate]

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Pontosphaera versa, synonyms included - Discolithina versa; Pontosphaera scissura; Pontosphaera versa;
  • space-time plot :: Samples map :: Parent: Pontosphaera

    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 :: view :: open

    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 :: view :: open

    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 :: ::

    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 :: view :: open

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

    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 :: view :: open

    Sherwood, R. W. (1974). Calcareous nannofossil systematics, palaeoecology and biostratigraphy of the Middle Eocene Weches Formation of Texas. Tulane Studies in Geology. 11: 1-79. gs :: view :: open


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    Pontosphaera versa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-6-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1100 Go to Archive.is to create a permanent copy of this page - citation notes



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