Nannotax3 - ntax_cenozoic

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:

Tags	LITHS: holococcolith, quadrate, hollow, CA: bar, CROSS-POLARS: R-prominent,
Metrics	Lith 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:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: fossil holococcoliths

References:

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

Quadrilateris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-4-2021

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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