Discoaster gemmifer


Classification: ntax_cenozoic -> Discoasterales -> Discoasteraceae -> Discoaster -> D. nodifer group -> Discoaster gemmifer
Sister taxa: D. cruciformis, D. colletii, D. gemmifer, D. mediosus, D. binodosus, D. nodifer, D. distinctus, D. septemradiatus, D. tanii, D. tani ornatus, D. istanbulensis, D. martinii, D. williamsii, D. backmanii, D. okadai

Taxonomy:

Citation: Discoaster gemmifer Stradner, 1961
Rank: Species

Distinguishing features: A discoaster with 8 bifurcating rays without a prominent central knob. The rays form an overlapping pattern that spirals dextrally and is distinctive of this species.

Farinacci & Howe catalog pages: D. gemmifer *

Search data:
TagsLITHS: nannolith-radiate, star-shaped, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 8->22µm; Segments: 8->8;
Data source notes: size from OD & illustrated specs
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: Neptune records
First occurrence (base): within NP11 zone (53.70-54.17Ma, base in Ypresian stage). Data source: Neptune records

Plot of occurrence data:

References:

Perch-Nielsen, K. (1971c). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs V O

Stradner, H. (1961). Vorkommen von Nannofossilien im Mesozoikum und Alttertiär. Erdoel-Zeitschrift. 77(3): 77-88. gs


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Discoaster gemmifer compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-4-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=470 Go to Archive.is to create a permanent copy of this page - citation notes



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