Nannotax3 - ntax_mesozoic - Eoconusphaera hallstattensis Nannotax3 - ntax_mesozoic - Eoconusphaera hallstattensis

Eoconusphaera hallstattensis

Classification: ntax_mesozoic -> Nannoliths inc sedis -> Eoconusphaeraceae -> Eoconusphaera -> Eoconusphaera hallstattensis
Sister taxa: E. hallstattensis, E. zlambachensis, E. sp.


Citation: Eoconusphaera hallstattensis Demangel et al. 2021
taxonomic rank: Species
Basionym: Eoconusphaera hallstattensis Demangel et al. 2021
Taxonomic discussion: Eoconusphaera hallstattensis and E. zlambachensis have distinctly different organisation of the elements in the core, with irregularly overlapping vertical laths in E. hallstattensis and oblique bundles of regularly arranged laths in E. zlambachensis. Also, E. hallstattensis does not show an axial suture under crossed nicols, while E. zlambachensis does. The two species can be easily distinguished in the LM due to their different inner structures. Finally, the two species are dominant in distinct stratigraphic intervals - Early Rhaetian for E. hallstattensis vs M-L Rhaetian for E. zlambachensis.

Farinacci & Howe catalog pages: E. hallstattensis *

2 - 6 µm long

Search data:
LITHS: nannolith-other, circular, CA: closed, CROSS-POLARS: V-prominent, R-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 Rhaetian Stage (201.3-209.46Ma, top in Rhaetian stage). Data source:
First occurrence (base): within Rhaetian Stage (201.3-209.46Ma, base in Rhaetian stage). Data source:

Plot of occurrence data:


Demangel, I., Howe, R., Gardin, S. & Richoz, S. (2021). Eoconusphaera hallstattensis sp. nov. and a review of the Rhaetian genus Eoconusphaera. Journal of Nannoplankton Research. 39(1): 77-87. gs O

Gardin, S., Krystyn, L., Richoz, S., Bartolini, A. & Galbrun, B. (2012). Where and when the earliest coccolithophores? Lethaia. 45: 507-523. gs


Eoconusphaera hallstattensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-12-2023

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

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