Nannotax3 - ntax_main - Lapideacassis wisei Nannotax3 - ntax_main - Lapideacassis wisei

Lapideacassis wisei


Classification: ntax_main -> Nannolith families inc sed -> Lapideacassaceae -> Lapideacassis -> Lapideacassis wisei
Sister taxa: L. glans, L. mariae, L. asymmetrica, L. blackii, L. magnifica, L. bispinosa, L. cornuta, L. wisei, L. trispina, L. tricornus, L. multispinata, L. sp.


Taxonomy:
Citation: Lapideacassis wisei (Perch-Nielsen, in Perch-Nielsen & Franz, 1977) Young & Bown 2014
Taxonomic rank: species
Basionym: Scampanella wisei Perch-Nielsen, in Perch-Nielsen & Franz, 1977

Distinguishing features:
Parent taxon (Lapideacassis): Hemispherical to cylindrical nannoliths, with walls constructed from one to several cycles of thin elements, enclosing a hollow central space; the nannolith tapers distally, and may have long apical spines or processes.
Species arranged here by number of spines.

This taxon: 3, asymmetric, spines; proximal collar

Farinacci & Howe catalog pages:
S. wisei *


Morphology:
Nannolith with a proximal tier, a distal tier, and an apical cone from which three asymmetrically arranged apical spines extend.

Search data:
LITHS: nannolith-radiate, circular, cylindrical, hollow, CA: process, CROSS-POLARS: R-prominent,
Lith size: 6->12µm; Segments: 6->10;
Data source notes: length (excluding spines) from illustrated specimens; elem numbers from count on SEM image and extend range by +-2
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP9 zone (55.86-57.21Ma, top in Ypresian stage). Data source: Perch-Nielsen & Franz 1977
First occurrence (base): within NP3 zone (63.25-64.81Ma, base in Danian stage). Data source: Perch-Nielsen & Franz 1977

Plot of occurrence data:

References:

Perch-Nielsen, K. & Franz, H. E. (1977). Lapideacassis and Scampanella, calcareous nannofossils from the Paleocene at sites 354 and 356, DSDP Leg 39, Southern Atlantic. Initial Reports of the Deep Sea Drilling Project. 39: 849-862. gs

Young, J. R. & Bown, P. R. (2014). Some emendments to calcareous nannoplankton taxonomy. Journal of Nannoplankton Research. 33(1): 39-46. gs


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Lapideacassis wisei compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-6-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=808 Go to Archive.is to create a permanent copy of this page - citation notes



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