Holodiscolithus geisenii


Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Holodiscolithus -> Holodiscolithus geisenii
Sister taxa: H. agniniae, H. catellus, H. geisenii, H. lippertii, H. liui, H. macroporus, H. minolettii, H. serus, H. solidus, H. whitesideae, H. sp.

Taxonomy:

Citation: Holodiscolithus geisenii Bown, 2005
Rank: Species

Distinguishing features: Small, elliptical with complex, weakly birefringent, central plate

Farinacci & Howe catalog pages: H. geisenii *


Morphology: Small, elliptical, inconspicuous coccolith with a narrow dark rim and a complexly-constructed, weakly-birefringent central area plate. The central plate is characterized by gently curving axial sutures (i.e. black lines) flanked by small blocks of higher birefringence.

Search data:
TagsLITHS: holococcolith, elliptical, CROSS-POLARS: R-prominent,
MetricsLith size: 3->4µm;
Data source notes: lith size from OD & extended slightly
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: Bown & Dunkley Jones, 2006
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: [PRB rough estimate]

Plot of occurrence data:

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. 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


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Holodiscolithus geisenii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=718 Go to Archive.is to create a permanent copy of this page - citation notes



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