Discoaster prepentaradiatus plautus
Classification: ntax_cenozoic -> Discoasterales -> Discoasteraceae -> Discoaster -> D. pentaradiatus group -> Discoaster prepentaradiatus -> Discoaster prepentaradiatus plautus
Sister taxa: D. prepentaradiatus prepentaradiatus, D. prepentaradiatus plautus, D. styzenii, D. trifolius
- Browning et al 2017 fig3-04.jpg
- Browning et al 2017 pl01 17.JPG
- Browning et al 2017 pl01 18.JPG
- Browning et al 2017 pl01 19.JPG
Citation: Discoaster prepentaradiatus ssp. plautus Browning & Bergen, in Browning et al. 2017Rank: sub-speciesTaxonomic 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: D. prepentaradiatus plautus *
Morphology: Typically this form has robust bifurcations diverging at an obtuse angle, relatively broad rays and large central area.
The morphological data given here can be used on the advanced search page. See also these notes
|Tags||LITHS: nannolith-radiate, star-shaped, CROSS-POLARS: 1ou, V-prominent, |
|Metrics||Lith size: 0->0µm; |
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:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Discoaster prepentaradiatus
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 V O