Discoaster wemmelensis


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. multiradiatus group -> Discoaster wemmelensis
Sister taxa: D. delicatus, D. multiradiatus, D. lenticularis, D. wemmelensis, D. mohleri, D. nobilis, D. salisburgensis, D. barbadiensis, D. spinescens, D. kuepperi, D. splendidus, D. diastypus, D. bifax,

Taxonomy:

Citation: Discoaster wemmelensis Achuthan & Stradner, 1969
Rank: Species

Distinguishing features: Small (4-6 µm), rosette-shaped discoaster with raised central area; 20-30 rays joined along most of their length with simple ray tips.

Farinacci & Howe catalog pages: Discoaster wemmelensis *

Search data:
TagsLITHS: nannolith-radiate, rosette-shaped, RIM: free-rays-short,
CSPH: not known, V-UNITS: all, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 4->6µm; Segments: 20->26;
Sources: size from OD & illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: PRB entry to Nannotax
First occurrence (base): within NP14 zone (46.29-49.11Ma, base in Ypresian stage). Data source: PRB entry to Nannotax

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: Discoaster wemmelensis, synonyms included - Discoaster wemmelensis;
  • space-time plot :: Samples map :: Parent: D. multiradiatus group

    References:

    Achuthan, M. V. & Stradner, H. (1969). Calcareous nannoplankton from the Wemmelian stratotype. In, Brönnimann, P. & Renz, H. H. (eds) Proceedings of the First International Conference on Planktonic Microfossils. Brill, Leiden, Geneva 1: 1-13. 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. (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

    Perch-Nielsen, K. (1971b). 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. (1977). 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

    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


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    Discoaster wemmelensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=514 Go to Archive.is to create a permanent copy of this page - citation notes



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