Nannotax3 - ntax_mesozoic - Laguncula montrisouensis Nannotax3 - ntax_mesozoic - Laguncula montrisouensis

Laguncula montrisouensis


Classification: ntax_mesozoic -> Heterococcoliths inc sedis -> globular inc sedis -> Laguncula -> Laguncula montrisouensis
Sister taxa: L. dorotheae, L. montrisouensis, L. sp.

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:

Citation: Laguncula montrisouensis Burnett, 1997
taxonomic rank: Species

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:

A species of Laguncula with a subdiamond-shaped outline and a thin basal plate situated at the neck of the form. Distinguished from L. dorotheae in having a subangular outline and a basal plate. [Burnett 1997]

Size:
Holotype dimensions: 10.4µm long, 8.7µm at widest point, 5.7µm plate width.

Search data:
LITHS: murolith, circular, cylindrical, hollow, CA: process,
Lith size: 8->10µm;
Data source notes: illustrated specimens (diameter)
The morphological data given here can be used on the advanced search page. See also these notes

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:

References:

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 O


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Laguncula montrisouensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2024

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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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