Nannotax3 - ntax_main - Rhagodiscus cepekii Nannotax3 - ntax_main - Rhagodiscus cepekii

Rhagodiscus cepekii


Classification: ntax_main -> Mesozoic nannofossils -> Eiffellithales -> Rhagodiscaceae -> Rhagodiscus -> Rhagodiscus cepekii
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 cepekii (Crux 1987) Rutledge & Bown, in Bown et al. 1998
Taxonomic rank: species
Basionym: Chiastozygus cepekii * Crux 1987

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: Small (~4µm) loxolith coccoliths with granular basal plate and 'cross-bars' supporting a large, flaring spine with serrated edges. In LM, this species may be virtually indistinguishable from small specimens of R. asper.

Search data:
LITHS: murolith, elliptical, CA: grill, plate, process, CROSS-POLARS: rim-unicyclic, R-prominent,
Lith size: 3.5->4.5µm;
Data source notes: original description +/-0.5µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Barremian Substage (124.40-126.50Ma, top in Barremian stage). Data source: Bown et al. 1998
First occurrence (base): within Early Barremian Substage (124.40-126.50Ma, base in Barremian stage). Data source: Bown et al. 1998

Plot of occurrence data:

References:

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Crux, J. A. (1987c). Six new species of calcareous nannofossils from the Lower Cretaceous strata of England and Germany. INA Newsletter. 9(1): 30-35. gs

Crux, J. A. (1989). Biostratigraphy and palaeogeographical applications of Lower Cretaceous nannofossils from north-western Europe. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 143-211. gs


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Rhagodiscus cepekii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-9-2026

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11018 Go to Archive.is to create a permanent copy of this page - citation notes



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