Nannotax3 - ntax_cenozoic - Amaurolithus brevigracilis Nannotax3 - ntax_cenozoic - Amaurolithus brevigracilis

Amaurolithus brevigracilis

Classification: ntax_cenozoic -> Nannolith families inc sed -> Ceratolithaceae -> Amaurolithus -> Amaurolithus brevigracilis
Sister taxa: A. brevigracilis, A. delicatus, A. primus, A. tricorniculatus, A. sp.


Citation: Amaurolithus brevigracilis de Kaenel & Bergen, in de Kaenel et al. 2017
taxonomic rank: species
Taxonomic discussion: Separation of this form from A. delicatus is of uncertain utility.

Distinguishing features:
Parent taxon (Amaurolithus): Ceratoliths non-birefringent or only weakly birefringent
This taxon: Like A. delicatus but shorter arms.

Farinacci & Howe catalog pages: A. brevigracilis *

Search data:
LITHS: nannolith-other, horseshoe-shaped, CROSS-POLARS: 1ou, V-prominent,
Lith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN14 zone (3.92-4.13Ma, top in Zanclean stage). Data source: Blair et al 2017
First occurrence (base): within CN9b subzone (6.91-7.42Ma, base in Tortonian stage). Data source: Blair et al 2017

Plot of occurrence data:


Blair, S. A., Bergen, J. A., de Kaenel, E., Browning, E. & Boesiger, T. M. (2017). Upper Miocene-Lower Pliocene taxonomy and stratigraphy in the circum North Atlantic Basin: radiation and extinction of Amauroliths, Ceratoliths and the D. quinqueramus lineage. Journal of Nannoplankton Research. 37(2-3): 113-144. gs O


Amaurolithus brevigracilis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-2-2024

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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