Nannotax3 - ntax_cenozoic - Discoaster triuncinus

Discoaster triuncinus

Classification: ntax_cenozoic -> Discoasterales -> Discoasteraceae -> Discoaster -> D. pentaradiatus group -> Discoaster hamatus -> Discoaster triuncinus
Sister taxa: D. bolivariae, D. triuncinus

Browning et al 2017 fig3-06.jpg
Browning et al 2017 pl04 01-2.JPG
Browning et al 2017 pl04 03.JPG
Theod84 pl37-07.JPG

Taxonomy:

Citation: Discoaster triuncinus Browning & Bergen, in Browning et al. 2017

Rank: species

Distinguishing features: 3-rayed D. hamatus

Farinacci & Howe catalog pages: D. triuncinus *

Search data:

Tags	LITHS: nannolith-radiate, star-shaped, CROSS-POLARS: 1ou, V-prominent,
Metrics	Lith size: 0->0µm;

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Borowning et al record it as rangig into NN10 but with poorly constrained range due to rare and sproadic occurrence.
Last occurrence (top): in lower part of NN10 zone (30% up, 9.2Ma, in Tortonian stage). Data source: Browning et al 2017
First occurrence (base): within NN9 zone (9.53-10.55Ma, base 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 hamatus

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 V O

Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs V O

Discoaster triuncinus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-1-2021

Taxon Search:

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1646 Go to Archive.is to create a permanent copy of this page - citation notes

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