Cyclagelosphaera alta


Classification: Mesozoic -> Watznaueriales -> Watznaueriaceae -> Cyclagelosphaera -> Cyclagelosphaera alta
Sister taxa: C. margerelii, C. alta, C. reinhardtii, C. rotaclypeata, C. shenleyensis, C. argoensis, C. brezae, C. centrumelliptica, C. deflandrei, C. jiangii, C. lacuna, C. wiedmannii, C. sp.,

Distinguishing features: Cyclagelosphaera with central-plug-forming inner tube cycle that forms a raised conical structure.


Taxonomy:

Citation: Cyclagelosphaera alta Perch-Nielsen 1979
Rank: Species
Notes & discussion: This species was described from the Danian but has been recorded from the Maastrichtian (Thibault 2010)

Farinacci & Howe catalog pages: Cyclagelosphaera alta *

Distinguishing features: Cyclagelosphaera with central-plug-forming inner tube cycle that forms a raised conical structure.

Search data:
TagsLITHS: placolith, circular, CA: closed,
CSPH: equant, monomorphic, R-UNITS: R-prominent, DETAILS: ca_conjunct, rim-unicyclic,
MetricsLith size: 5->7µm;
Sources: illustrated specimens - Danian specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Danian Stage (61.61-66.04Ma, top in Danian stage). Data source:
First occurrence (base): within Maastrichtian Stage (66.04-72.05Ma, base in Maastrichtian stage). Data source:

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Cyclagelosphaera

    References:

    Perch-Nielsen, K. (1979a). Calcareous nannofossil zonation at the Cretaceous/Tertiary boundary in Denmark. In, Birkelund, T. & Bromley, R. G. (eds) Proceedings Cretaceous-Tertiary Boundary Events Symposium, Copenhagen, 1. Copenhagen 115-135. gs :: ::

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs :: view :: open


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    Cyclagelosphaera alta compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-5-2020

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10338 Go to Archive.is to create a permanent copy of this page - citation notes



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