Rhagodiscus pancostii

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


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

Search data:
TagsLITHS: murolith, elliptical, CA: plate, process, R-UNITS: R-prominent, DETAILS: rim-unicyclic,
MetricsLith size: 3->5µm;
Sources: holotype +/-1µm
The morphological data given here can be used on the advanced search page. See also these notes

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


    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 :: view :: open


    Rhagodiscus pancostii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-7-2020

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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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