Ramsaya


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Ramsaya
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata, Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths,

Distinguishing features: Holococcoliths with rim of 12-14 blocks and central-area spanned by a narrow, dark bar.


Daughter taxa: (blue => in age window 0-800Ma)
Holococcoliths with rim of 12-14 blocks and central-area spanned by a narrow, dark bar.

Taxonomy:

Citation: Ramsaya Risatti, 1973
Rank: Genus
Type species: Ramsaya swanseana Risatti, 1973

Farinacci & Howe catalog pages: Ramsaya * , ,

Distinguishing features: Holococcoliths with rim of 12-14 blocks and central-area spanned by a narrow, dark bar.

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 Maastrichtian Stage (0% up, 72.1Ma, in Maastrichtian 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

Risatti, J. B. (1973). Nannoplankton biostratigraphy of the Upper Bluffport Marl-Lower Prairie Bluff Chalk interval (upper Cretaceous) in Mississippi. In, Smith, L. A. & Hardenbol, J. (eds) Proceedings of the Symposium on Calcareous Nannofossils. Gulf Coast Section SEPM Publication, 8-57. gs


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Ramsaya compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10983 Go to Archive.is to create a permanent copy of this page - citation notes



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