Discoaster spinescens


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. multiradiatus group -> Discoaster spinescens
Sister taxa: D. delicatus, D. multiradiatus, D. lenticularis, D. wemmelensis, D. mohleri, D. nobilis, D. salisburgensis, D. barbadiensis, D. spinescens, D. kuepperi, D. splendidus, D. diastypus, D. bifax,

Taxonomy:

Citation: Discoaster spinescens Bown & Dunkley Jones, 2006
Rank: Species
Notes & discussion: Similar to Discoaster barbadiensis Tan, 1927, but with a taller spine that is distinctly conspicuous in side- and plan-views, but may be a preservational morphotype of this species.

Distinguishing features: Rosette-shaped discoaster, bearing a tall, thin spine on one side; ca 12 rays, joined along most of their length with triangular terminations, .

Farinacci & Howe catalog pages: Discoaster spinescens *

Search data:
TagsLITHS: nannolith-radiate, rosette-shaped, RIM: free-rays-short, PROCESS: boss,
CSPH: not known, V-UNITS: all, R-UNITS: none, DETAILS: 1ou,
MetricsLith size: 7->10┬Ám; Segments: 8->19;
Sources: size from OD
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP16 zone (40.40-42.87Ma, top in Bartonian stage). Data source: PRB entry to Nannotax
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian stage). Data source: PRB entry to Nannotax

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: D. multiradiatus group

    References:

    Bown, P. R. & Dunkley Jones, T. (2006). New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research. 28(1): 17-34. gs

    Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs


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    Discoaster spinescens compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=503 Go to Archive.is to create a permanent copy of this page - citation notes



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