Nannotax3 - ntax_mesozoic - Cribrocorona

Cribrocorona


Classification: ntax_mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Cribrocorona
Sister taxa: Podorhabdus, Hemipodorhabdus, Axopodorhabdus, Tetrapodorhabdus, Hexapodorhabdus, Octocyclus, Octopodorhabdus ⟩⟨ Dodekapodorhabdus, Perissocyclus, Teichorhabdus ⟩⟨ Cribrosphaerella, Ethmorhabdus, Nephrolithus, Psyktosphaera ⟩⟨ Cribrocorona

Distinguishing features:
Parent taxon (Axopodorhabdaceae): Regular placoliths; central-area, with cross-bars or perforated plate; often with tall, hollow spines.
Distal shield elements non-imbricate V-units; proximal shield and inner cycle formed from R-units. Rim often appears beaded in LM

This taxon: Subcircular with very high rim; central-area narrow, with grill.


Daughter taxa (time control age-window is: 0-800Ma)
Cribrocorona echinus
One cycle regular, the other appears to be a hemispherical mass of spines
Cribrocorona gallica
Both cycles regular, grill in central area.
Cribrocorona sp.
Specimens not identified to species level.

Taxonomy:

Citation: Cribrocorona Perch-Nielsen, 1973
Rank: Genus
Type species: Coccolithus gallicus Stradner, 1963

Farinacci & Howe catalog pages: Cribrocorona *

Distinguishing features:
Parent taxon (Axopodorhabdaceae): Regular placoliths; central-area, with cross-bars or perforated plate; often with tall, hollow spines.
Distal shield elements non-imbricate V-units; proximal shield and inner cycle formed from R-units. Rim often appears beaded in LM

This taxon: Subcircular with very high rim; central-area narrow, with grill.

Search data:
TagsLITHS: placolith, circular, cylindrical, hollow, CA: ca_disjunct, grill, vacant, closed, CROSS-POLARS: rim-unicyclic, R-prominent,
MetricsLith size: 4->10µm;
Data source notes: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
First occurrence (base): near base of Santonian Stage (5% up, 86.1Ma, in Santonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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

Perch-Nielsen, K. (1973c). Neue Coccolithen aus dem Maastrichtien von Danemark, Madagaskar und Agypten. Bulletin of the Geological Society of Denmark. 22: 306-333. gs V O


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Cribrocorona compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-11-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10305 Go to Archive.is to create a permanent copy of this page - citation notes



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