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.
| LITHS: placolith, elliptical, CA: plate, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
| Lith size: 8->12µm; Data source notes: original description & illustrated specimens |
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:
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. gsReferences:

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