Cyclagelosphaera brezae


Classification: Mesozoic -> Watznaueriales -> Watznaueriaceae -> Cyclagelosphaera -> Cyclagelosphaera brezae
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: Medium to large Cyclagelosphaera with closed central area, small proximal shield, large elements, and indistinct V-units cycle.


Taxonomy:

Citation: Cyclagelosphaera brezae Applegate & Bergen, 1988
Rank: Species
Synonyms:
  • Cyclagelosphaera paucisegmenta Varol & Bowman 2019 this form appears to be identical and the authors did not differentiate it form C. brezae. [my interpretation - JRY 2019]

Farinacci & Howe catalog pages: Cyclagelosphaera brezae *

Distinguishing features: Medium to large Cyclagelosphaera with closed central area, small proximal shield, large elements, and indistinct V-units cycle.


Size: 8-12 µm according to Varol & Bowman 2019; holotype of Applegate & Bergen 9 µm.

Geological Range:
Last occurrence (top): within Valanginian Stage (133.88-139.39Ma, top in Valanginian stage). Data source: Bown 2005
First occurrence (base): within Late Tithonian Substage (145.01-147.72Ma, base in Tithonian stage). Data source: Varol & Bowman 2019

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: Cyclagelosphaera brezae, synonyms included - Cyclagelosphaera brezae;
  • space-time plot :: Samples map :: Parent: Cyclagelosphaera

    References:

    Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program. Scientific Results. 103: 293-348. gs

    Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. gs

    Varol, O. & Bowman, A. R. (2019). Taxonomic revision of selected Late Jurassic (Tithonian) calcareous nannofossils and the application of mobile mounting. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 291: 65-87. gs


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    Cyclagelosphaera brezae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10341 Go to Archive.is to create a permanent copy of this page - citation notes



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