Nannotax3 - ntax_main - Rhagodiscus eboracensis Nannotax3 - ntax_main - Rhagodiscus eboracensis

Rhagodiscus eboracensis


Classification: ntax_main -> Mesozoic nannofossils -> Eiffellithales -> Rhagodiscaceae -> Rhagodiscus -> Rhagodiscus eboracensis
Sister taxa: R. achlyostaurion, R. amplus, R. angustus, R. asper, R. cepekii, R. dekaenelii, R. infinitus, R. manifestus NOMEN NUDUM, R. pseudoangustus, R. splendens ⟩⟨ R. adinfinitus, R. buisensis, R. gallagheri, R. indistinctus, R. pancostii, R. plebeius, R. robustus, R. sageri, R. sicutclipeus ⟩⟨ R. eboracensis, R. hamptonii, R. reniformis, R. sp.


Taxonomy:
Citation: Rhagodiscus eboracensis Black 1971
Taxonomic rank: species
Basionym: Rhagodiscus eboracensis * Black 1971

Synonyms:

Distinguishing features:
Parent taxon (Rhagodiscus): Loxolith coccoliths with low rim and central-area filled by a granular plate which may be perforate and/or spine-bearing. In xpl the rim is unicyclic moderately bright, the central area is granular, lacking a clear extinction cross.
This taxon: Medium sized, with wide rim and no spine, weakly asymmetric

Search data:
LITHS: murolith, elliptical, CA: plate, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 6->7µm;
Data source notes: original description & 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 Hauterivian Stage (126.50-132.60Ma, top in Hauterivian stage). Data source: Original description
First occurrence (base): within Hauterivian Stage (126.50-132.60Ma, base in Hauterivian stage). Data source: Original description

Plot of occurrence data:

References:

Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs

De Kaenel, E., Mojon, P. -O. & Pictet, A. (2020). New biostratigraphical data (calcareous nannofossils, ammonites) and Early to Late Barremian transition in the Urgonien Jaune facies and Marnes de la Russille complex of the Swiss Jura Mountains. Swiss Journal of Palaeontology. 139(6): 1-43. gs O

Wind, F. H. & Cepek, P. (1979). Lower Cretaceous calcareous nannoplankton from DSDP Hole 397A (northwest African Margin). Initial Reports of the Deep Sea Drilling Project. 47A: 221-235. gs


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Rhagodiscus eboracensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-10-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11020 Go to Archive.is to create a permanent copy of this page - citation notes



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