Discoaster gemmulatus


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

Taxonomy:

Citation: Discoaster gemmulatus Blair & Bergen, in Blair et al. 2017
Rank: species

Distinguishing features: Like D. bellus but with weak central knob

Farinacci & Howe catalog pages: D. gemmulatus *


Phylogenetic relations: Suggested by Blair et al (2017) to be an evolutionary intermediate between D. bellus and D. quinqueramus

Search data:
TagsLITHS: nannolith-radiate, star-shaped, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Range similar to D. bellus.
Last occurrence (top): within NN11 zone (5.59-8.29Ma, top 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:

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 V O


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Discoaster gemmulatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1593 Go to Archive.is to create a permanent copy of this page - citation notes



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