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,

Short diagnosis: 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 *

Short diagnosis: 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:

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: 15-12-2017

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Go 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. :)
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Mike Styzen (Noble Energy, US)
Is this a synonym of Discoaster saundersi, Hay et al. 1967?
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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.
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Mike Styzen (Noble Energy, US)
D. saundersi looks like an elvis species to me
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Paul Bown (Univeristy College London, UK)
I agree! Spanner is UK English for wrench! Two nations divided by a common language!
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J Kell (Lincoln Nebraska, US)
hahaha
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