Ansulasphaera bownii


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

Distinguishing features: Ansulasphaera species with wide central opening, short proximal shield and poorly developed tube cycles.


Taxonomy:

Citation: Ansulasphaera bownii Rahman & Roth, 1991
Rank: Species

Farinacci & Howe catalog pages: Ansulasphaera bownii *

Distinguishing features: Ansulasphaera species with wide central opening, short proximal shield and poorly developed tube cycles.

Geological Range:
Last occurrence (top): within Tithonian Stage (145.01-152.06Ma, top in Tithonian stage). Data source: Rahman & Roth, 1991 (original description)
First occurrence (base): within Oxfordian Stage (157.25-163.47Ma, base in Oxfordian stage). Data source: Rahman & Roth, 1991 (original description)

Plot of occurrence data:

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

    References:

    Rahman, A. & Roth, P. H. (1991). Upper Jurassic calcareous nannofossils from the DSDP Site 534 in the Blake Bahama Basin, western North Atlantic. Eclogae Geologicae Helvetiae. 84: 765-789. gs


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    Ansulasphaera bownii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10027 Go to Archive.is to create a permanent copy of this page - citation notes



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