Rhagodiscus hamptonii


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

Distinguishing features: A species of Rhagodiscus with construction and light microscopic image similar to that of R. achlyostaurion, but which is larger (length c. 6.5-8.5 µm, width c. 5.0-6.5 µm), with a relatively narrower rim and broad central area, with no spine or a small spine base.


Taxonomy:

Citation: Rhagodiscus hamptonii Bown in Kennedy et al., 2000
Rank: Species

Farinacci & Howe catalog pages: Rhagodiscus hamptonii *

Distinguishing features: A species of Rhagodiscus with construction and light microscopic image similar to that of R. achlyostaurion, but which is larger (length c. 6.5-8.5 µm, width c. 5.0-6.5 µm), with a relatively narrower rim and broad central area, with no spine or a small spine base.

Geological Range:
Last occurrence (top): within Late Albian Substage (100.50-107.59Ma, top in Albian stage). Data source: Kennedy et al., 2000
First occurrence (base): within Late Aptian Substage (112.95-122.98Ma, base in Aptian stage). Data source: Kennedy et al., 2000

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Rhagodiscus

    References:

    Bown, P. R. (2001). Calcareous nannofossils of the Gault, Upper Greensand and Glauconitic Marl (Middle Albian-Lower Cenomanian) from the BGS Selborne boreholes, Hampshire. Proceedings of the Geologists' Association. 112: 223-236. gs

    Gale, A. S. et al. (2011). The uppermost Middle and Upper Albian succession at the Col de Palluel, Hautes-Alpes, France: An integrated study (ammonites, inoceramid bivalves, planktonic foraminifera, nannofossils, geochemistry, stable oxygen and carbon isotopes, cyclostratigraphy). Cretaceous Research. 32: 59-130. gs

    Kennedy, W. J. et al. (2000). Integrated stratigraphy across the Aptian-Albian boundary in the Marnes Bleues, at the Col de Pre _-Guittard, Arnayon (Drome), and at Tartonne (Alpes-de-Haute-Provence), France: a candidate Global Boundary Stratotype Section and Boundary Point for the base of the Albian Stage. Cretaceous Research. 21: 591-720. gs


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    Rhagodiscus hamptonii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11022 Go to Archive.is to create a permanent copy of this page - citation notes



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