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,

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


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]

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

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

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
  • Taxon plotted: Discoaster distinctus, synonyms included - Discoaster broennimannii; Discoaster bronnimannii; Discoaster distinctus; space-time plot :: Samples map :: Parent: D. nodifer group

    References:

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


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    Discoaster distinctus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-12-2018

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



    Comments (1)

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    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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