Lithastrinus septenarius


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

Distinguishing features: Lithastrinus with seven narrow, curving wall-elements surrounding a narrow central area.


Taxonomy:

Citation: Lithastrinus septenarius Forchheimer, 1972
Rank: Species
Notes & discussion: Varol (1992) used the name Lithastrinus moratus for this morphotype

Farinacci & Howe catalog pages: Lithastrinus septenarius *

Distinguishing features: Lithastrinus with seven narrow, curving wall-elements surrounding a narrow central area.

Geological Range:
Last occurrence (top): at top of UC11c subzone (100% up, 85.6Ma, in Santonian stage). Data source: Burnett 1998 (zonal marker)
First occurrence (base): at base of UC9a subzone (0% up, 91.8Ma, in Turonian stage). Data source: Burnett 1998 (zonal marker), fig.6.3

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 septenarius, synonyms included - Lithastrinus septenarius;
  • 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

    Forchheimer, S. (1972). Scanning electron microscope studies of Cretaceous coccoliths from the Köpingsberg Borehole No. 1, SE Sweden. Sveriges Geologiska Undersökning; Series C. #668, 65: 1-141. gs

    Varol, O. (1992b). Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy. Newsletters on Stratigraphy. 27(93-127): -. gs

    Watkins, D. K. (1992). Upper Cretaceous nannofossils from Leg 120, Kergeulen Plateau, Southern Ocean. Proceedings of the Ocean Drilling Program. Scientific Results. 120: 343-370. gs


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    Lithastrinus septenarius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10573 Go to Archive.is to create a permanent copy of this page - citation notes



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