Nannotax3 - ntax_mesozoic - Lapideacassis trispina

Lapideacassis trispina


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Lapideacassaceae -> Lapideacassis -> Lapideacassis trispina
Sister taxa: L. asymmetrica, L. bispinosa, L. cornuta, L. glans, L. magnifica, L. mariae, L. tricornus, L. trispina, L. sp.

Distinguishing features:
Parent taxon (Lapideacassis): Large hemispherical to tall cylindrical nannoliths with narrow walls constructed from one to several cycles of thin elements, enclosing a hollow central space; the nannolith tapers distally, and may have apical spines or processes. Protruding ledges often mark the junction of different cycles in the wall.
This taxon: Lapideacassis with three, near-horizontally orientated, tapering apical spines.


Taxonomy:

Citation: Lapideacassis trispina Perch-Nielsen in Perch-Nielsen & Franz, 1977
Rank: Species

Farinacci & Howe catalog pages: L. trispina *

Distinguishing features:
Parent taxon (Lapideacassis): Large hemispherical to tall cylindrical nannoliths with narrow walls constructed from one to several cycles of thin elements, enclosing a hollow central space; the nannolith tapers distally, and may have apical spines or processes. Protruding ledges often mark the junction of different cycles in the wall.
This taxon: Lapideacassis with three, near-horizontally orientated, tapering apical spines.

Search data:
TagsLITHS: nannolith-radiate, circular, cylindrical, hollow, CA: process, closed, CROSS-POLARS: R-prominent,
MetricsLith size: 10->14µm; Segments: 8->12;
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:
Notes: Paleocene occurrence may be Cretaceous reworking according to Perch-Nielsen and Franz (1977).
Last occurrence (top): within NP4 zone (61.51-63.25Ma, top in Selandian stage). Data source: Perch-Nielsen & Franz 1977
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian stage). Data source: Burnett 1998

Plot of occurrence data:

References:

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 V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

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 V O


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Lapideacassis trispina compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10564 Go to Archive.is to create a permanent copy of this page - citation notes



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