Discoaster distinctus


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. nodifer group -> Discoaster distinctus
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 distinctus Martini, 1958
Rank: Species
Synonyms: Discoaster nivalis Manivit 1959 [my interpretation - JRY 2015]
Discoaster bronnimanni Stradner 1961[my interpretation - JRY 2015]
Discoaster turkiensis Sadek & Ozer 1981[my interpretation - JRY 2015]

Distinguishing features: 5-6 rayed stellate discoasters; ray tips with bifurcation and lateral nodes (resemble spanners).

Farinacci & Howe catalog pages: Discoaster distinctus * , Discoaster nivalis * , Discoaster bronnimanni * , Discoaster turkiensis *

Search data:
TagsLITHS: nannolith-radiate, star-shaped, RIM: tips-bifurcate, free-rays-long, tips w lateral nodes,
CSPH: not known, V-UNITS: all, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 7->16µm; Segments: 5->6;
Sources: size from OD
The morphological data given here can be used on the advanced search page. See also these notes

See also: Discoaster deflandrei - very similar but bifurcations less angular;Discoaster nodifer - similar but ray tip notched rather than bifurcate;;

Geological Range:
Last occurrence (top): within NP15 zone (42.87-46.29Ma, top in Lutetian stage). Data source: PRB entry to Nannotax
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian 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 distinctus, synonyms included - Discoaster broennimannii; Discoaster bronnimannii; Discoaster distinctus;
  • space-time plot :: Samples map :: Parent: D. nodifer group

    References:

    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

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

    Martini, E. (1958). Discoasteriden und verwandte Formen im NW-deutschen Eozän (Coccolithophorida). 1. Taxonomische Untersuchungen. Senckenbergiana Lethaea. 39: 353-388. 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

    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

    Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs


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    Discoaster distinctus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=466 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (1)

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    Gravatar
    J Kell (Lincoln Nebraska, US)
    I think the bifurcate ray-tips resemble wrenches. :)
    Gravatar
    Mike Styzen (Noble Energy, US)
    Is this a synonym of Discoaster saundersi, Hay et al. 1967?
    Gravatar
    Paul Bown (Univeristy College London, UK)
    The holotypes do look similar, but I think the wrench-like ray endings may be more angular in D. distinctus.
    Gravatar
    Mike Styzen (Noble Energy, US)
    D. saundersi looks like an elvis species to me
    Gravatar
    Paul Bown (Univeristy College London, UK)
    I agree! Spanner is UK English for wrench! Two nations divided by a common language!
    Gravatar
    J Kell (Lincoln Nebraska, US)
    hahaha
    Page 1 of 1
     

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