Cribrosphaerella


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

Distinguishing features: Elliptical to subrectangular; central-area with coarsely-perforate net.


Daughter taxa (time control age-window is: 0-800Ma)
Cribrosphaerella circula
Small (4-6µm), sub-circular, Cribrosphaerella species
Cribrosphaerella daniae
Large Cribrosphaerella species with narrow rim
Cribrosphaerella ehrenbergii
Typical Cribrosphaerella species
Cribrosphaerella pelta
Cribrosphaerella with small central area
Cribrosphaerella santacruzensis
Large oblong species of Cribrosphaerella with broad shield
Cribrosphaerella sp.
Specimens not identified to species level

Taxonomy:

Citation: Cribrosphaerella Deflandre in Piveteau, 1952
Rank: Genus
Type species: Cribrosphaerella ehrenbergii (Arkhangelsky, 1912) Deflandre in Piveteau, 1952
Synonyms:
Taxonomic discussion: Although several species have been described most authors assign all specimens to C. ehrenbergii

Farinacci & Howe catalog pages: Cribrosphaerella + * , Cretadiscus * , Cribrosphaera * , Favocentrum *

Distinguishing features: Elliptical to subrectangular; central-area with coarsely-perforate net.


Morphology: Well-preserved specimens show three-shields (or tiers), the upper two shields are formed of V-units, and on overgrown species may fuse into one mass. The proximal shield is formed of R-units with the V-units appearing as a cycle of peg-like elements between the R-units.

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, grill, plate, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 4->12µm;
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 Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Albian Stage (0% up, 113Ma, in Albian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Arkhangelsky, A. D. (1912). Upper Cretaceous deposits of east European Russia. Materialien zur Geologie Russlands. 25: 1-631. gs

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

Gartner, S. (1968). Coccoliths and related calcareous nannofossils from Upper Cretaceous deposits of Texas and Arkansas. University of Kansas Paleontological Contributions, Articles. 48 (Protista 1): 1-56. gs V O

Piveteau, J. (1952). Traité de Paléontologie. In, Grassé, P. P. (ed.) Traité de Zoologie. Anatomie, systématique, biologie, 1, part 1, Phylogenie. Protozoaires: généralités. Flagellés. Masson and Cie, Paris 107-115,. gs


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Cribrosphaerella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10309 Go to Archive.is to create a permanent copy of this page - citation notes



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