Quadrilateris


Classification: ntax_cenozoic -> Holococcoliths -> fossil holococcoliths -> Quadrilateris
Sister taxa: Clathrolithus, Corannulus, Daktylethra, Holodiscolithus, Lanternithus, Multipartis, Octolithus, Orthozygus, Quadrilateris, Semihololithus, Varolia, Youngilithus, Zygrhablithus, Unidentified fossil holococcoliths

Daughter taxa (time control age-window is: 0-800Ma)
Quadrilateris imparidividuus
A small, narrowly rectangular holococcolith formed from four thin blocks that are birefringent in XPL.
Quadrilateris sp.
Specimens which cannot be assigned to any established species

Taxonomy:

Citation: Quadrilateris Varol, 1991
Rank: Genus
Type species: Quadrilateris imparidividuus Varol, 1991

Distinguishing features: Rectangular holococcoliths formed from four thin blocks that are birefringent in XPL.

Farinacci & Howe catalog pages: Quadrilateris *

Search data:
TagsLITHS: holococcolith, quadrate, hollow, CA: bar, CROSS-POLARS: R-prominent,
MetricsLith size: 2->4µm; Segments: 4->4;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): near top of Priabonian Stage (86% up, 34.4Ma, in Priabonian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Lutetian Stage (23% up, 46.3Ma, in Lutetian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Varol, O. (1991). New Cretaceous and Tertiary Calcareous Nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 182: 211-237. gs


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Quadrilateris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-6-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1139 Go to Archive.is to create a permanent copy of this page - citation notes



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