Discoaster distinctus


Classification: ntax_cenozoic -> 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: D. distinctus * , D. nivalis * , D. bronnimanni * , D. turkiensis *

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

Search data:
TagsLITHS: nannolith-radiate, star-shaped, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 7->16µm; Segments: 5->6;
Data source notes: size from OD
The morphological data given here can be used on the advanced search page. See also these notes

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:

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 V O

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 V O

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

Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 30(1): 57-79. gs V O

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

Perch-Nielsen, K. (1971c). 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. (1977a). 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 V O

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 V O

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 V O

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

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 V O


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Discoaster distinctus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

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Short stable page link: https://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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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.
Gravatar
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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