Discoaster tani ornatus


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. nodifer group -> Discoaster tani ornatus
Sister taxa: D. cruciformis, D. colletii, D. gemmifer, D. mediosus, D. binodosus, D. nodifer, D. distinctus, D. septemradiatus, D. tanii, D. tani ornatus, D. istanbulensis, D. martinii, D. williamsii, D. backmanii, D. okadai,

Taxonomy:

Citation: Discoaster tani ornatus Bramlette & Wilcoxon 1967
Rank: sub-species
Basionym: Discoaster tani ornatus Bramlette & Wilcoxon 1967
Synonyms:

Distinguishing features: 5 rayed large stellate discoaster with prominent lateral nodes on their rays, ray-end notches or bifurcations and a stellate central boss.

Farinacci & Howe catalog pages: Discoaster tani ornatus *


Morphology remarks: D. tani ornatus tends to have thicker rays, more conspicuous central boss and more developed ray-end notches than Discoaster tanii or Discoaster nodifer.

Search data:
TagsLITHS: nannolith-radiate, star-shaped, RIM: tips-bifurcate, free-rays-long, tips w lateral nodes, PROCESS: boss,
CSPH: not known, V-UNITS: all, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 10->15µm; Segments: 5->5;
Sources: size from 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 NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: PRB entry to Nannotax
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian 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 tani ornatus, synonyms included - Discoaster ornatus; Discoaster tani ornatus; Discoaster tanii ornatus; space-time plot :: Samples map :: Parent: D. nodifer group

    References:

    Bown, P. R. & Dunkley Jones, T. (2006). New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research. 28(1): 17-34. 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

    Bramlette, M. N. & Wilcoxon, J. A. (1967b). Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology. 5: 93-131. 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

    Shamrock, J. L. & Watkins, D. K. (2012). Eocene calcareous nannofossil biostratigraphy and community structure from Exmouth Plateau, Eastern Indian Ocean (ODP Site 762). Stratigraphy. 9(1): 1-11. gs


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    Discoaster tani ornatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-9-2019

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=509 Go to Archive.is to create a permanent copy of this page - citation notes



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