Varolia macleodii
Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Varolia -> Varolia macleodii
Sister taxa: V. boomeri, V. cistula, V. gracilimura, V. macleodii, V. sicca, V. sp.
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Taxonomy:
Citation: Varolia macleodii Bown & Dunkley Jones, 2006Rank: SpeciesTaxonomic discussion: Similar to Varolia cistula but with a filled central cavity.
Distinguishing features: Small, thin-walled, cavate holococcolith with a domed upper surface. The cavate central-area space is filled with small, birefringent elements and at least two prominent vertical plates.
Farinacci & Howe catalog pages: V. macleodii *
Search data:
| Tags | LITHS: holococcolith, elliptical, hollow, CA: closed, CROSS-POLARS: V-prominent, R-prominent, |
| Metrics | Lith size: 3.5->4.2µm;
Data source notes: lith size (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 NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: Dunkley Jones et al., 2009
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:
- 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: Varolia
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
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
