Nannoconus quadriangulus

Classification: Mesozoic -> Braarudosphaerales -> Nannoconaceae -> Nannoconus -> N. truitti group -> Nannoconus quadriangulus
Sister taxa: N. cornuta, N. donnatensis, N. elongatus, N. inconspicuus, N. longus, N. minutus, N. multicadus, N. planus, N. quadriangulus, N. quadricanalis, N. truittii,

Distinguishing features: quadriangular (height = width).

Daughter taxa: (blue => in age window 0-800Ma)
tapering, typically similar height and width.
quadriangular (height = width).


Citation: Nannoconus quadriangulus Deflandre & Deflandre-Rigaud, 1962
Rank: Species

Farinacci & Howe catalog pages: N. quadriangulus *

Distinguishing features: quadriangular (height = width).

Morphology remarks: Short-cylindrical (quadriangular) nannoconids with central cavity that is similar in width to the wall.

Search data:
TagsLITHS: nannolith-radiate, circular, cylindrical, hollow, CA: vacant, CROSS-POLARS: T-prominent,
MetricsLith size: 5->7µm;
Data source notes: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Aptian Stage (112.95-126.30Ma, top in Aptian stage). Data source: Perch-Nielsen 1985a
First occurrence (base): within Aptian Stage (112.95-126.30Ma, base in Aptian stage). Data source: Perch-Nielsen 1985a

Plot of occurrence data:


Deflandre, G. & Deflandre-Rigaud, M. (1962). Remarques sur l'évolution des Nannoconidés à propos de quelques nouveaux types du Crétacé inferieur de Haute-Provence. Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Paris. 255: 2948-2951. gs V O


Nannoconus quadriangulus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-10-2020

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