Helicosphaera bramlettei


Classification: Coccolithophores -> Zygodiscales -> Helicosphaeraceae -> Helicosphaera -> H. lophota group -> Helicosphaera bramlettei
Sister taxa: H. clarissima, H. compacta, H. disrupta, H. reticulata, H. robinsoniae, H. bramlettei, H. lophota, H. papillata, H. prolixa, H. seminulum, H. wilcoxonii,

Taxonomy:

Citation: Helicosphaera bramlettei (Müller, 1970) Jafar & Martini, 1975
Rank: Species
Basionym: Helicopontosphaera bramlettei Müller, 1970
Variants: Helicosphaera gartneri Theodoridis, 1984

Distinguishing features: Elliptical Helicosphaera with relatively wide central area spanned by a broad, oblique disjunct bar.

Farinacci & Howe catalog pages: Helicopontosphaera bramlettei * , Helicosphaera gartneri *

Search data:
TagsLITHS: placolith, asymmetric, RIM: wing, CA: bar-diagonal NE-SW, bar-diagonal, bar,
CSPH: ellipsoidal-----, elongated, monomorphic, varimorphic, V-UNITS: distal shield, V-prominent, R-UNITS: blanket, c-str, px-plate, R-prominent, DETAILS: ca_disjunct, rim-bicyclic, isogyres kinked, isogyres oblique, isogyres separated,
MetricsLith size: 8->12µm;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP25 zone (24.40-26.84Ma, top in Chattian stage). Data source: Boesiger et al 2017
First occurrence (base): within NP14 zone (46.29-49.11Ma, base in Ypresian 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: Helicosphaera bramlettei, synonyms included - Helicopontosphaera bramlettei; Helicosphaera bramlettei;
  • space-time plot :: Samples map :: Parent: H. lophota group

    References:

    Boesiger, T. M., de Kaenel, E., Bergen, J. A., Browning, E. & Blair, S. A. , . (2017). Oligocene to Pleistocene taxonomy and stratigraphy of the genus Helicosphaera and other placolith taxa in the circum North Atlantic Basin. Journal of Nannoplankton Research. 37(2-3): 145-175. gs

    Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs

    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

    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

    de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program. Scientific Results. 149: 79-145. 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. (1973). Evolutionary trends in the Cenozoic coccolithophore genus Helicopontosphaera. Micropaleontology. 19(1): 32-52. gs

    Jafar, S. A. & Martini, E. (1975). On the validity of the calcareous nannoplankton genus Helicosphaera. Senckenbergiana Lethaea. 56: 381-397. gs

    Müller, C. (1970b). Nannoplankton-Zonen der Unteren-Meeresmolasse Bayerns. Geologica Bavarica. 63: 107-118. gs

    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

    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

    Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs

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


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    Helicosphaera bramlettei compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 31-3-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=654 Go to Archive.is to create a permanent copy of this page - citation notes



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