Rhagodiscus pancostii


Classification: Mesozoic -> Eiffellithales -> Rhagodiscaceae -> Rhagodiscus -> Rhagodiscus pancostii
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: Small (holotype 4 µm), with small slender spine with bright tip


Taxonomy:

Citation: Rhagodiscus pancostii Lees, 2007
Rank: Species

Farinacci & Howe catalog pages: Rhagodiscus pancostii * , ,

Distinguishing features: Small (holotype 4 µm), with small slender spine with bright tip


Morphology remarks: "A small, elliptical species of Rhagodiscus that bears a very small, delicate spine. The spine-tip appears bright in XPL. Differentiation: Similar to R. achlyostaurion, but with a spine-base/top that is much smaller, and does not occupy most of the central area. R. gallagheri is somewhat similar, but has no spine and is more narrowly elliptical. The specimen in Pl.4, figs 5, 6 has a narrower, brighter rim, which differs from that seen in R. pancostii; this specimen may be Orastrum partitum." [Lees 2007]

Size: Holotype dimensions: L = 3.96μm, W = 2.86μm

Geological Range:
Last occurrence (top): within Early Turonian Substage (92.90-93.90Ma, top in Turonian stage). Data source: Lees 2007 (original description)
First occurrence (base): within Early Turonian Substage (92.90-93.90Ma, base in Turonian stage). Data source: Lees 2007 (original description)

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:

    Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs


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    Rhagodiscus pancostii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-7-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11026 Go to Archive.is to create a permanent copy of this page - citation notes



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