Nannotax3 - ntax_main - Gaarderella granulifera Nannotax3 - ntax_main - Gaarderella granulifera

Gaarderella granulifera


Classification: ntax_main -> Mesozoic nannofossils -> Podorhabdales -> Biscutaceae -> Gaarderella -> Gaarderella granulifera
Sister taxa: G. granulifera, G. sp.


Taxonomy:
Citation: Gaarderella granulifera Black 1973
Taxonomic rank: species
Basionym: Gaarderella granulifera * Black 1973

Synonyms:

Distinguishing features:
Parent taxon (Gaarderella): Elliptical, large with broad shields; central area wide, spanned by a granular plate.
This taxon: Large placolith with broad shields and wide central area spanned by a granular central-area plate.


Morphology:
The nature of the rim is uncertain because the type images are all proximal views, but they appear to by Sollasites-like. The use of the name for LM images is rather variable. Rarely reported.

Search data:
LITHS: placolith, elliptical, CA: plate, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 8->12µm;
Data source notes: original description & 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 Albian Stage (100.50-113.20Ma, top in Albian stage). Data source: Bown et al. 1998
First occurrence (base): within Albian Stage (100.50-113.20Ma, base in Albian stage). Data source: Bown et al. 1998

Plot of occurrence data:

References:

Black, M. (1973). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph. 127: 49-112. gs

Bown, P. R. (2001). Calcareous nannofossils of the Gault, Upper Greensand and Glauconitic Marl (Middle Albian-Lower Cenomanian) from the BGS Selborne boreholes, Hampshire. Proceedings of the Geologists' Association. 112: 223-236. gs

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Jeremiah, J. (1996). A proposed Albian to Lower Cenomanian nannofossil biozonation for England and the North Sea Basin. Journal of Micropalaeontology. 15(97-129): -. gs

Kennedy, W. J., et al. (2000). Integrated stratigraphy across the Aptian-Albian boundary in the Marnes Bleues, at the Col de Pre _-Guittard, Arnayon (Drome), and at Tartonne (Alpes-de-Haute-Provence), France: a candidate Global Boundary Stratotype Section and Boundary Point for the base of the Albian Stage. Cretaceous Research. 21: 591-720. gs


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Gaarderella granulifera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-7-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10455 Go to Archive.is to create a permanent copy of this page - citation notes



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