Nannotax3 - ntax_mesozoic - Cyclagelosphaera brezae <title>Nannotax3 - ntax_mesozoic - Cyclagelosphaera brezae

Cyclagelosphaera brezae


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

Distinguishing features:
Parent taxon (Cyclagelosphaera): Circular watznaueriacean coccoliths.
This taxon: 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: C. brezae *

Distinguishing features:
Parent taxon (Cyclagelosphaera): Circular watznaueriacean coccoliths.
This taxon: Medium to large Cyclagelosphaera with closed central area, small proximal shield, large elements, and indistinct V-units cycle.


Morphology:


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


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: placolith, circular, CA: ca_conjunct, closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 8->12µm;
Data source notes: Varol & Bowman 2019
The morphological data given here can be used on the advanced search page. See also these notes

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:

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 O

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 O

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: 30-1-2023

Taxon Search:
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AphiaID: not found
Short stable page link: https://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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