Nannotax3 - ntax_mesozoic - Petrarhabdus vietus Nannotax3 - ntax_mesozoic - Petrarhabdus vietus

Petrarhabdus vietus


Classification: ntax_mesozoic -> Podorhabdales -> Prediscosphaeraceae -> Petrarhabdus -> Petrarhabdus vietus
Sister taxa: P. copulatus, P. kirenii, P. vietus, P. sp.

Distinguishing features:
Parent taxon (Petrarhabdus): Prediscosphaera with massive, blocky spine covering most of the distal surface.
This taxon: >A species of Petrarhabdus in which the spine is significantly smaller than the coccolith. In the LM, the image is very highly birefringent.  In the SEM, the spine appears to be composed of three stacks of calcite blocks.


Taxonomy:

Citation: Petrarhabdus vietus Burnett, 1997
taxonomic rank: Species
Synonyms:
Taxonomic discussion: The shield does not seem to closely resemble that of P. copulatus and the assignment of the species should be considered tentative.

Farinacci & Howe catalog pages: P. vietus *

Distinguishing features:
Parent taxon (Petrarhabdus): Prediscosphaera with massive, blocky spine covering most of the distal surface.
This taxon: >A species of Petrarhabdus in which the spine is significantly smaller than the coccolith. In the LM, the image is very highly birefringent.  In the SEM, the spine appears to be composed of three stacks of calcite blocks.

Search data:
LITHS: placolith, elliptical, CA: ca_disjunct, process, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
Lith size: 10->20µm;
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): in upper part of UC20a subzone (80% up, 69Ma, in Maastrichtian stage). Data source: Burnett 1998, fig 6.6
First occurrence (base): within Santonian Stage (83.65-85.70Ma, base in Santonian stage). Data source: Burnett 1998

Plot of occurrence data:

References:

Burnett, J. A. (1997c). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs

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

Perez-Rodriguez, I., Lees, J. A., Larasoaña, J. C., Arz, J. A. & Arenillas, I. (2012). Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain. Cretaceous Research. 37: 100-126. gs


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Petrarhabdus vietus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-6-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10893 Go to Archive.is to create a permanent copy of this page - citation notes
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