Lithastrinus quadricuspis


Classification: Mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Lithastrinus -> Lithastrinus quadricuspis
Sister taxa: L. quadricuspis, L. pentabrachius, L. grillii, L. septenarius, L. sp.,

Distinguishing features: Nannolith with two superposed cycles of four ray-like elements with a narrow central diaphragm. One cycle has long narrow rays and the other has much shorter rays.


Taxonomy:

Citation: Lithastrinus quadricuspis Farhan, 1987
Rank: Species

Farinacci & Howe catalog pages: Lithastrinus quadricuspis + *

Distinguishing features: Nannolith with two superposed cycles of four ray-like elements with a narrow central diaphragm. One cycle has long narrow rays and the other has much shorter rays.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): within UC15b subzone (77.61-79.00Ma, base in Campanian stage). Data source: Burnett 1998

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Lithastrinus quadricuspis, synonyms included - Lithastrinus quadricuspis; space-time plot :: Samples map :: Parent: Lithastrinus

    References:

    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

    Farhan, A. (1987). Evolutionary Trend of the Genus Lithastrinus to the Genus Uniplanarius. Abhandlungen der Geologischen Bundesanstalt. 39: 57-65. gs

    Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-60. gs


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    Lithastrinus quadricuspis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-9-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10572 Go to Archive.is to create a permanent copy of this page - citation notes



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