Nannotax3 - ntax_mesozoic - Chiastozygus synquadriperforatus

Chiastozygus synquadriperforatus


Classification: ntax_mesozoic -> Eiffellithales -> Chiastozygaceae -> Chiastozygus -> Chiastozygus synquadriperforatus
Sister taxa: C. amphipons, C. bifarius, C. lamprostauros, C. litterarius, C. platyrhethus, C. spissus ⟩⟨ C. antiquus, C. garrisonii, C. stylesii, C. trabalis ⟩⟨ C. propagulis, C. quadriperforatus, C. synquadriperforatus, C. tenuis, C. sp.

Distinguishing features:
Parent taxon (Chiastozygus): Murolith (loxolith) coccoliths with relatively narrow rim and wide central area spanned by diagonal bars. Inner/proximal rim cycle is variably developed and so the LM image may be unicyclic or bicyclic.
This taxon: Cross asymmetric one bar longer than the other,


Taxonomy:

Citation: Chiastozygus synquadriperforatus Bukry, 1969
Rank: Species

Farinacci & Howe catalog pages: C. synquadriperforatus *

Distinguishing features:
Parent taxon (Chiastozygus): Murolith (loxolith) coccoliths with relatively narrow rim and wide central area spanned by diagonal bars. Inner/proximal rim cycle is variably developed and so the LM image may be unicyclic or bicyclic.
This taxon: Cross asymmetric one bar longer than the other,


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: murolith, elliptical, CA: ca_disjunct, process, diagonal cross, CROSS-POLARS: rim-unicyclic, V-prominent,
Lith size: 5->7µm;
Data source notes: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Burnett (1998)
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Burnett (1998)

Plot of occurrence data:

References:

al Rawahi, Z. & Dunkley Jones, T. (2019). Calcareous nannofossil assemblages of the Late Cretaceous Fiqa Formation, north Oman. Journal of Micropalaeontology. 38(1): 25-54. gs O

Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O

Hattner, J. G. & Wise, S. W. (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology. 24: 41-117. gs

Püttmann, T. & Mutterlose, J. (2019). Calcareous nannofossils from a Late Cretaceous nearshore setting. Journal of Nannoplankton Research. S4: 81-88. gs V O

Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs O


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Chiastozygus synquadriperforatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-12-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10258 Go to Archive.is to create a permanent copy of this page - citation notes



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