Discoaster quinqueramus


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. quinqueramus group -> Discoaster quinqueramus
Sister taxa: D. quintatus, D. quinqueramus, D. berggrenii, D. explicatus, D. consutus, D. bergenii, D. compactus, D. vinsonii, D. abrachiatus, D. newellii, D. tetracladus, D. hexaramus, D. prolixus,

Taxonomy:

Citation: Discoaster quinqueramus Gartner 1969
Rank: Species
Synonyms:
Notes & discussion: D. bergenii, D. bergrennii and D. quinqueramus form an anagenetic lineage, with central area size decreasing and free ray length increasing. Distinguishing them is useful for determining position within the early part of zone NN11.

Distinguishing features: Symmetrical; central-area, with prominent distal sutural ridges and large proximal boss; rays concavo-convex, with rounded tips. Central area width less than free ray length [or, adjacent rays meet at the central area].

Farinacci & Howe catalog pages: Discoaster quinqueramus * , Discoaster quintatus + * , Eu-discoaster quinqueramus *


Morphology remarks: Symmetrical 5-rayed discoaster; central-area, with prominent distal sutural ridges and large proximal boss; rays concavo-convex, with rounded tips. Central area width less than free ray length.

Size: : Highly variable, c.5-15microns.

Search data:
TagsLITHS: nannolith-radiate, star-shaped, RIM: free-rays-long, CA: process, PROCESS: boss, boss-proximal, distal-star,
CSPH: not known, V-UNITS: all, V-prominent, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 6->20µm; Segments: 5->5;
Sources: size from OD & illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Confined to NN11 (zone defining species). Virtually absent from the Mediterranean and Para-Tethys.
Last occurrence (top): at top of NN11 zone (100% up, 5.6Ma, in Messinian stage). Data source: zonal marker (see e.g. Young 1998)
First occurrence (base): at base of NN11 zone (0% up, 8.3Ma, in Tortonian stage). Data source: zonal marker (see e.g. Young 1998)Young 1998

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 quinqueramus, synonyms included - Discoaster quinqueramus; Discoaster quinqueramus (morphotype A); Discoaster quinqueramus/berggrenii; Discoaster quintatus;
  • space-time plot :: Samples map :: Parent: D. quinqueramus group

    References:

    Bergen, J. A. (1984). Calcareous nannoplankton from Deep Sea Drilling Project Leg 78A: evidence for imbricate underthrusting at the Lesser Antillian active margin. Initial Reports of the Deep Sea Drilling Project. 78A: 411-445. gs :: view :: open

    Blair, S. A., Bergen, J. A., de Kaenel, E., Browning, E. & Boesiger, T. M. (2017). Upper Miocene-Lower Pliocene taxonomy and stratigraphy in the circum North Atlantic Basin: radiation and extinction of Amauroliths, Ceratoliths and the D. quinqueramus lineage. Journal of Nannoplankton Research. 37(2-3): 113-144. gs :: view :: open

    Bukry, D. & Bramlette, M. N. (1969). Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. Tulane Studies in Geology. 7: 131-142. gs :: view :: open

    de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs :: view :: open

    Gartner, S. (1969). Correlation of Neogene planktonic foraminifera and calcareous nannofossil zones. Transactions of the Gulf Coast Association of Geological Societies. 19: 585-599. gs :: ::

    Müller, C. (1974). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs :: view :: open

    Perch-Nielsen, K. (1972). Remarks on Late Cretaceous to Pleistocene coccoliths from the North Atlantic. Initial Reports of the Deep Sea Drilling Project. 12: 1003-1069. gs :: view :: open

    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 :: 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 :: ::

    Wei, W. (2003). Upper Miocene nannofossil bistratigraphy and taxonomy of Exxon core CH30-43-2 from the Gulf of Mexico. Journal of Nannoplankton Research. 25(1): 17-23. gs :: view :: open

    Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs :: ::


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    Discoaster quinqueramus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=496 Go to Archive.is to create a permanent copy of this page - citation notes



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