Discoaster prepentaradiatus plautus


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. pentaradiatus group -> Discoaster prepentaradiatus -> Discoaster prepentaradiatus plautus
Sister taxa: D. prepentaradiatus prepentaradiatus, D. prepentaradiatus plautus, D. styzenii, D. trifolius,

Taxonomy:

Citation: Discoaster prepentaradiatus ssp. plautus Browning & Bergen, in Browning et al. 2017
Rank: sub-species
Notes & discussion: This form is often regarded as the typical type of D. prepentaradiatus, however in the original description whilst Bukry & Percival (1971) illustrated both forms they selected a specimen with slender bifurcations for the holotype.

Distinguishing features: Form with broad bifurcations

Farinacci & Howe catalog pages: Discoaster prepentaradiatus plautus *


Morphology remarks: Typically this form has robust bifurcations diverging at an obtuse angle, relatively broad rays and large central area.

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

Geological Range:
Notes: Browning et al. (2017) record this form as having a consisitently lower LAD in the Gulf of Mexico than the form with robust bifurcations.
Last occurrence (top): in upper part of NN10 zone (83% up, 8.5Ma, in Tortonian stage). Data source: Browning et al 2017
First occurrence (base): in mid part of NN9 zone (51% up, 10Ma, in Tortonian stage). Data source: Browning 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 prepentaradiatus

    References:

    Browning, E., Bergen, J. A., Blair, S. A., Boesiger, T. M. & de Kaenel, E. (2017). Late Miocene to Late Pliocene taxonomy and stratigraphy of the genus Discoaster in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 189-214. gs

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    Discoaster prepentaradiatus plautus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-10-2019

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