Heliolithus aktasii


Classification: ntax_cenozoic -> Discoasterales -> Heliolithaceae -> Heliolithus -> Heliolithus aktasii
Sister taxa: H. aktasii, H. bukryi, H. cantabriae, H. kleinpellii, H. knoxii, H. riedelii, H. sp.

Taxonomy:

Citation: Heliolithus aktasii Varol, 1989
Rank: Species

Distinguishing features: Two relatively thick cycles of similar diameter.

Farinacci & Howe catalog pages: H. aktasii *

Search data:
TagsLITHS: nannolith-radiate, circular, star-shaped, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith size: 6->8µm;
Data source notes: size from OD & slightly extended
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of NP9 zone (20% up, 56.9Ma, in Ypresian stage). Data source: Varol, (1989, fig. 12.4)
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Varol, 1989

Plot of occurrence data:

References:

Varol, O. (1989c). Palaeocene calcareous nannofossil biostratigraphy. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series. 265-310. gs V O

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Heliolithus aktasii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-2-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=699 Go to Archive.is to create a permanent copy of this page - citation notes
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