Discoaster diastypus


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. multiradiatus group -> Discoaster diastypus
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 diastypus Bramlette & Sullivan, 1961
Rank: Species

Distinguishing features: Large to very large rosette-shaped discoasters with prominent bosses on both sides; 9-16 rays joined along 1/2-2/3 length &typically curved.

Farinacci & Howe catalog pages: Discoaster diastypus *

Search data:
TagsLITHS: nannolith-radiate, rosette-shaped, star-shaped, RIM: N: curved rays, free-rays-short, CA: process, PROCESS: boss, boss-prox & dist,
CSPH: not known, V-UNITS: all, V-prominent, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 10->22µm; Segments: 9->16;
Sources: size from OD, Romein 1979 & 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 NP12 zone (50.50-53.70Ma, top in Ypresian stage). Data source: PRB entry to Nannotax
First occurrence (base): in upper part of NP10 zone (60% up, 54.8Ma, in Ypresian stage). Data source: Agnini et al. 2007, fig. 9, zonal marker for CP8/9 boundary

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

    References:

    Agnini, C., Fornaciari, E., Raffi, I., Rio, D., Rohl, U. & Westerhold, T. (2007). High-resolution nannofossil biochronology of middle Paleocene to early Eocene at ODP Site 1262: Implications for calcareous nannoplankton evolution. Marine Micropaleontology. 64: 215-248. gs :: ::

    Bown, P. R. (2005). 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

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

    Bybell, L. M. & Self-Trail, J. (1995). Evolutionary, biostratigraphic and taxonomic study of calcareous nanofossils from a continuous Palaeocene-Eocene boundary section in New Jersey. US Geological Survey professional paper. 1554: 1-36. gs :: ::

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

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


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    Discoaster diastypus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-7-2020

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=465 Go to Archive.is to create a permanent copy of this page - citation notes



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