Distinguishing features:
Parent taxon (Laguncula): Murolith coccoliths with large bulbous/spherical, hollow spines or processes.
This taxon: Low rimmed coccolith with large, ?flat, flaring distal process with a curved upper surface.
Taxonomy:
Farinacci & Howe catalog pages: L. montrisouensis *
Distinguishing features:
Parent taxon (Laguncula): Murolith coccoliths with large bulbous/spherical, hollow spines or processes.
This taxon: Low rimmed coccolith with large, ?flat, flaring distal process with a curved upper surface.
Morphology:
Size:
LITHS: murolith, circular, cylindrical, hollow, CA: process, |
Lith size: 8->10µm; Data source notes: illustrated specimens (diameter) |
Geological Range:
Last occurrence (top): within Cenomanian Stage (93.90-100.50Ma, top in Cenomanian stage). Data source: Burnett 1998
First occurrence (base): within Albian Stage (100.50-113.20Ma, base in Albian stage). Data source: Burnett 1998
Plot of occurrence data:
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 Burnett, J. A. (1997c). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs OReferences:
Laguncula montrisouensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-10-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10552 Go to Archive.is to create a permanent copy of this page - citation notes |
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