Discoaster astellaris


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. pentaradiatus group -> Discoaster bellus -> Discoaster astellaris
Sister taxa: D. astellaris, D. gemmulatus,

Taxonomy:

Citation: Discoaster astellaris de Kaenel & Bergen, in de Kaenel et al. 2017
Rank: species
Synonyms:

Distinguishing features: Like D. bellus but asymmetric

Farinacci & Howe catalog pages: Discoaster astellaris *


Morphology remarks: Similar to D. asymmetricus but lacking a central knob.

Search data:
Tags
MetricsLith size: 0->0┬Ám; Segments: 5->5;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Range similar to that of regular D. bellus. Blair et al. (2017) report that it is too rare in the early part of its range to be of any use but that it becomes consistently present in upper NN10 and that its LAD in lower NN11 is useful.
Last occurrence (top): in lower part of NN11 zone (20% up, 7.8Ma, in Messinian stage). Data source: Blair et al 2017
First occurrence (base): within NN8 zone (10.55-10.89Ma, base in Tortonian stage). Data source: Blair et al 2017

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Discoaster bellus

    References:

    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


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    Discoaster astellaris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1589 Go to Archive.is to create a permanent copy of this page - citation notes



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