Tubodiscus bellii


Classification: Mesozoic -> Podorhabdales -> Tubodiscaceae -> Tubodiscus -> Tubodiscus bellii
Sister taxa: T. bellii, T. burnettiae, T. frankiae, T. jurapelagicus, T. verenae, T. sp.,

Distinguishing features: Medium sized (5-7 µm) with narrow shields / wide central area. In xpl the inner rim cycle is usually slightly narrower than the outer rim cycle


Taxonomy:

Citation: Tubodiscus bellii Bown, 2005
Rank: Species

Farinacci & Howe catalog pages: T. bellii *

Distinguishing features: Medium sized (5-7 µm) with narrow shields / wide central area. In xpl the inner rim cycle is usually slightly narrower than the outer rim cycle


Morphology remarks: Medium sized (5-7 µm) Tubodiscus with narrow shields and wide, open, central area. The rim image is bicyclic in XPL and the two cycles have contrasting birefringence, the inner cycle being distinctly bright. The inner cycle is usually slightly narrower than the outer.

The shields and individual cycles are narrower than those of other tubodiscids.

Search data:
Tagsplacolith, elliptical, CA: vacant, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: rim-bicyclic,
MetricsLith size: 5->7µm;
Data source notes: original description +/-0.5 µm
Sources: original description +/-0.5 µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Berriasian Stage (139.39-145.01Ma, top in Berriasian stage). Data source: Bown 2005
First occurrence (base): within Berriasian Stage (139.39-145.01Ma, base in Berriasian stage). Data source: Bown 2005

Plot of occurrence data:

References:

Bown, P. R. (2005c). 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 V O

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Tubodiscus bellii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-9-2020

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