Rhagodiscus dekaenelii


Classification: Mesozoic -> Eiffellithales -> Rhagodiscaceae -> Rhagodiscus -> Rhagodiscus dekaenelii
Sister taxa: R. achlyostaurion, R. amplus, R. angustus, R. asper, R. cepekii, R. dekaenelii, R. infinitus, R. pseudoangustus, R. splendens, R. adinfinitus, R. gallagheri, R. indistinctus, R. pancostii, R. plebeius, R. robustus, R. sageri, R. eboracensis, R. hamptonii, R. reniformis, R. sp.,

Distinguishing features: Small Rhagodiscus with a birefringent spine/spine base that almost fills the central area.


Taxonomy:

Citation: Rhagodiscus dekaenelii Bergen, 1994
Rank: Species
Notes & discussion: This form is similar to R. achylostaurion, but has a non-overlapping range.

Farinacci & Howe catalog pages: Rhagodiscus dekaenelii *

Distinguishing features: Small Rhagodiscus with a birefringent spine/spine base that almost fills the central area.


Morphology remarks: May be used as a secondary marker species approximating the base of Zone NK3 in the absence of Calcicalathina oblongata and Tubodiscus verenae (Bown, 2005).

Search data:
TagsLITHS: murolith, elliptical, CA: plate, process, R-UNITS: R-prominent, DETAILS: rim-unicyclic,
MetricsLith size: 4->6µm;
Sources: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Hauterivian Substage (133.09-133.88Ma, top in Hauterivian stage). Data source: Bown et al. 1998
First occurrence (base): within Early Valanginian Substage (136.41-139.39Ma, base in Valanginian stage). Data source: Bown et al. 1998

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Rhagodiscus dekaenelii, synonyms included - Rhagodiscus dekaenelii;
  • space-time plot :: Samples map :: Parent: Rhagodiscus

    References:

    Bergen, J. A. (1994). Berriasian to early Aptian calcareous nannofossils from the Vocontian Trough (SE France) and Deep Sea Drilling Site 534: new nannofossil taxa and a summary of low-latitude biostratigraphic events. Journal of Nannoplankton Research. 16(2): 59-69. gs :: view :: open

    Bown, P. R. (2005). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-82. gs :: view :: open

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


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    Rhagodiscus dekaenelii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11019 Go to Archive.is to create a permanent copy of this page - citation notes



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