Varolia cistula


Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Varolia -> Varolia cistula
Sister taxa: V. boomeri, V. cistula, V. gracilimura, V. macleodii, V. sicca, V. sp.

Taxonomy:

Citation: Varolia cistula Bown, 2005
Rank: Species

Distinguishing features: Small to medium-sized, thin-walled, box-like holococcolith with a gently curved upper surface. The thin, birefringent walls comprise at least four crystallographically distinct blocks.

Farinacci & Howe catalog pages: V. cistula *

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: closed, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith size: 4->4.7µm;
Data source notes: lith size (larger of height & width) 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 NP23 zone (29.62-32.02Ma, top in Rupelian stage). Data source: Bown 2005
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian stage). Data source: Dunkley Jones et al., 2009

Plot of occurrence data:

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 V O

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

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


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Varolia cistula compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-4-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1478 Go to Archive.is to create a permanent copy of this page - citation notes



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