Nannotax3 - ntax_mesozoic - Ansulasphaera covingtonii Nannotax3 - ntax_mesozoic - Ansulasphaera covingtonii

Ansulasphaera covingtonii


Classification: ntax_mesozoic -> Watznaueriales -> Watznaueriaceae -> Ansulasphaera -> Ansulasphaera covingtonii
Sister taxa: A. bownii, A. covingtonii, A. helvetica, C. nudus, A. sp.

Distinguishing features:
Parent taxon (Ansulasphaera): Watznaueriacean coccoliths with a tube-like/conical proximal shield.
This taxon: Ansulasphaera with an extended, conical, proximal shield and an elevated tube cycle on the distal side


Taxonomy:

Citation: Ansulasphaera covingtonii de Kaenel & Bergen, 1996
taxonomic rank: Species

Farinacci & Howe catalog pages: A. covingtonii *

Distinguishing features:
Parent taxon (Ansulasphaera): Watznaueriacean coccoliths with a tube-like/conical proximal shield.
This taxon: Ansulasphaera with an extended, conical, proximal shield and an elevated tube cycle on the distal side


Morphology:

Similar to Ansulasphaera helvetica Grün and Zweili, 1980.

Search data:
LITHS: placolith, elliptical, cylindrical, hollow, CA: vacant, CROSS-POLARS: rim-unicyclic, V-prominent,
Lith size: 4->6µm;
Data source notes: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Tithonian Stage (143.10-149.24Ma, top in Tithonian stage). Data source: de Kaenel & Bergen 1993
First occurrence (base): within Tithonian Stage (143.10-149.24Ma, base in Tithonian stage). Data source: de Kaenel & Bergen 1993

Plot of occurrence data:

References:

Bown, P. R. & Young, J. R. (1997). Mesozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 21-36. gs

de Kaenel, E. & Bergen, J. A. (1993). New Early and Middle Jurassic coccolith taxa and biostratigraphy from the eastern proto-Atlantic (Morocco, Portugal and DSDP Site 547B). Eclogae Geologicae Helvetiae. 86(861-907): -. gs O

de Kaenel, E. & Bergen, J. A. (1996b). Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 27-59. gs O

Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs


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Ansulasphaera covingtonii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-2-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10028 Go to Archive.is to create a permanent copy of this page - citation notes
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